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ICMS 2019

INTERATIONAL CONFERENCE ON MARINE SCIENCE

“Toward Sustainable Marine Resources and Environment”

4 SEPTEMBER 2019

BOGOR, INDONESIA

DEPARTMENT OF MARINE SCIENCE AND TECHNOLOGY

FACULTY OF FISHERIES AND MARINE SCIENCE

IPB UNIVERSITY

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ICMS 2019

INTERATIONAL CONFERENCE ON MARINE SCIENCE

“Toward Sustainable Marine Resources and Environment” 4 September 2019

Bogor

Indonesia

PROGRAMME AND ABSTRACTS

Editor : Jonson Lumban Gaol, Ani Haryati, Dea Fauzia Lestari, Sri Ratih Deswati

Cover : Mahesa Glagah Agung Satria

Citation:

Gaol J. 2019. Programme and Abstracts International Conference and Marine Science ‘Toward Sustainable Marine Resources and Environment’ 4 September 2019. IPB University. Bogor. 147.

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TABLE OF CONTENTS

ORGANIZING COMMITTEE .................................................................................................................... 1

PREFACE ................................................................................................................................................. 3

SPONSOR ............................................................................................................................................... 4

GENERAL INFORMATION ....................................................................................................................... 5

SPEAKERS ............................................................................................................................................... 7

SCHEDULE .............................................................................................................................................. 8

LIST OF ABSTRACT ................................................................................................................................. 9

KEYNOTE SPEAKER............................................................................................................................... 18

INVITED SPEAKER ................................................................................................................................ 20

ORAL PRESENTATION .......................................................................................................................... 24

Topic 1: Marine Resources and Environment ................................................................................. 25

Topic 2: Marine Science ................................................................................................................... 52

Topic 3: Marine Technology ............................................................................................................ 82

POSTER PRESENTATION .................................................................................................................... 119

LIST OF PARTICIPANT ......................................................................................................................... 136

INDEX ................................................................................................................................................. 141

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ORGANIZING COMMITTEE Advisory Board/Steering Committee 1. Prof. Dr. Iskandar Z. Siregar (International Collaboration Office, PB University) 2. Dr. Luky Adrianto (Faculty of Fisheries and Marine Science, IPB University) 3. Prof. Dr. Dietriech G. Bengen (Dept. of Marine Science and Technology - IPB University) 4. Prof. Dr. Vincentius P. Siregar (Dept. of Marine Science and Technology - IPB University) 5. Prof. Dr. Indra Jaya (Dept. of Marine Science and Technology - IPB University) 6. Dr. Tri Prartono (Dept. of Marine Science and Technology - IPB University) Scientific Committee Marine Science Dr. I Wayan Nurjaya Dept. of Marine Science and Technology - IPB University Indonesia Dr. Neviaty P. Zamani Dept. of Marine Science and Technology - IPB University Indonesia Dr. Agus S. Atmadipoera Dept. of Marine Science and Technology - IPB University Indonesia Dr. Hawis Maduppa Dept. of Marine Science and Technology - IPB University Indonesia Prof. Dr. Zainal Arifin Research Center for Oceanography - Indonesian Institut of

Sciences (LIPI) Indonesia Dr. Davin Setiamarga Wakayama National College of Technology - Japan Dr. Hirano Hirosuke Wakayama National College of Technology - Japan Dr. Philippe Gaspar Collecte Localisation Satellites (CLS) Toulouse - France Dr. Sonja Kleinertz DAAD - Germany Marine Technology Dr. Totok Hestirianoto Dept. of Marine Science and Technology - IPB University Indonesia Prof. Dr. Setyo B. Soesilo Dept. of Marine Science and Technology - IPB University Indonesia Prof. Dr. Henry M. Manik Dept. of Marine Science and Technology - IPB University Indonesia Dr. Nurul Hazrina Idris Univerisity Teknologi Malaysia Dr. Eko Siswanto Japan Agency for Marine-Earth Science and Technology,

(JAMSTEC) - Japan Dr. Fadli Syamsudin BPPT - Indonesia Dr. Takahiro Osawa Yamaguchi University - Japan

Marine Resources and Environment Dr. Meutia S. Ismet Dept. of Marine Science and Technology - IPB University Indonesia Dr. Sri Pujiyati Dept. of Marine Science and Technology - IPB University Indonesia Dr. Syamsul B. Agus Dept. of Marine Science and Technology - IPB University Indonesia Dr. Dwiyoga Nugroho Ministry of Marine and Fisheries Affairs (KKP) - Indonesia Dr. I Nyoman Radiarta Balai Penelitian Observasi Laut – KKP - Indonesia Dr. R. Heru Triharjanto National Institute of Aeronautics and Space of Indonesia

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Chairman: Dr. Jonson Lumban Gaol Treasurer

Risti E. Arhatin, M.Si. Wahyu Adi Setyaningsih., M.Si.

Secretariat Dr. Rastina Sri Ratih Deswati, M.Si. Mahesa Glagah Agung, M.Si Santi Susanti, S.I.K.

Program Dr. Yuli Naulita Ani Haryati, S.I.K. Oktavika Mayasari, A.Md.

Publication & Documentation : Boyke, A.Md Nurkholis, S.Pi.

Logistic & Transportation Dr. Nyoman MN Natih Dr. Totok Hestirianoto Erwin Maulana, S.Pi. Rizky Dimas, S.Pi.

Exhibition & Sponsorship Dr. Syamsul Bahri Agus, M.Si. Tri Hartanto, S.Pi, M.Si. Riza Aitiando Pasaribu, M.Si. Dondy Arafat, M.Si

Proceeding Prof. Henry Munandar Manik, PhD Dr. Neviaty Putri Zamani Dr. Agus Saleh Atmadipoera Dea Fauzia Lestari, M.Si Nadya Cakasana, M.Si

Dept. of Marine Science and Technology Faculty of Fisheries and Marine Sciences, IPB University Agatis Street, IPB Campus Darmaga, Bogor, 16680, Indonesia Phone : +62 (251) 8623644; Fax: +62 (251) 8623644; CP : +62 813 1707 0990 (Dr. Jonson Lumban Gaol) E-mail : icms_itk@ipb.ac.id Website : itk.ipb.ac.id/icms2019

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PREFACE

Indonesia formally endorsed the Sustainable Development Goals (SDGs) as a global development agreement. SDGs which contain 17 Goals and 169 targets are global action plans for the next 15 years (valid from 2016 to 2030), to end poverty, reduce inequality and protect the environment. These 17 Goals build on the successes of the Millennium Development Goals while including areas such as climate change and life below waters (ocean).

Indonesia as a maritime country is expected to succeed in achieving the 14th SDGs goal (life below waters). The SDGs aim to sustainably manage and protect marine and coastal ecosystems from pollution, as well as address the impacts of ocean acidification. Enhancing conservation and the sustainable use of ocean-based resources through international law will also help mitigate some of the challenges facing our oceans.

The SDGs are designed to involve all development actors, be they the Government, Civil Society Organizations (CSOs), the private sector, academics, and so on. Collaboration among researchers is successful key to achieve these goals, and interdisciplinary collaboration within marine science is also expected to trigger research and development activities, especially in the tropical regions of Indonesia.

The First and the Second International Conference on Marine Sciences (ICMS) was held successfully in June 2013 and September 2017 respectively, attended by international participants (Germany, France, Belgium, India, Japan, Philippines, Poland, Thailand, Yemen, Singapore and Indonesia with a total of 110 oral and 110 poster participants and the Second ICMS was successful in publishing more than 50 papers in the IOP proceedings indexed Scopus.

To keep this quadrennial conference agenda forward, in 2019 the Department of Marine Science and Technology will proudly organize the 3nd ICMS agenda in September 2019. Unlike the first ICMS, this year the presented papers (oral and poster) will be published in the international proceedings indexed by SCOPUS, through a defined review procedure, and in addition to being a scientific meeting among researchers. This activity can also encourage Bogor Agriculture University to boost the World University Ranking (WUR) through international scientific publications on SCOPUS indexed proceedings. It is expected that in this second ICMS event we will have 150 participants, which are included Lecturers/Researchers/Post-IPB Students. Their selected manuscript will be published in the international proceedings of IOP Conference Series indexed by Scopus.

In this regard, the Department of Marine Science and Technology of Bogor Agricultural University, will hold an international scientific meeting, namely:

International Conference on Marine Sciences (ICMS) 2019

Dr. Jonson Lumban-Gaol Chairman of committee

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SPONSOR The Organizing Committee gratefully acknowledge the support of:

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GENERAL INFORMATION The sea has diverse ecosystems and organism which become a mystery to human knowledge. The development of human being cannot be separated from ocean role. The exploration and exploitation begins with a new continental, food source, and jewelry or ornamental source finding that has been documented since ancient Greece. The utilization of marine resources is developed more intensively in order to understand more deeply about the process throughout the different zone, which can affect whole life inside the water. The organisms are also intensively used as the source of food, medicine and even renewable energy (that also called marine bio-prospecting). However, the frequent exploration and utilization of the resources has been conducted not in line with the sustainable principal. Therefore, marine resources exploration required an integrated system between exploration and sustainable use by involving various elements of science. Indonesia is an archipelagic country that has very large marine area and has been assured of sustaining high biodiversity. This potential can be used to fill the necessity of this nation. Although in the past, a number of Kingdoms in the archipelago is internationally respected for its superiority in control of the sea, but today our country still in development phase condition in many matters related to marine issues. One of Indonesia's maritime setbacks in the field of maritime can be seen from the low implementation of basic and applied researches that is not comparable with the availability of the marine potential. Those background can be a motivation for Indonesian, especially marine society to work together and take part in promoting marine, not only for scientific interest, but also for all human life welfare. In this regard, Department of Marine Science and Technology, Bogor Agricultural University will hold an international scientific conference, namely:

International Conference on Marine Sciences (ICMS) 2019

Theme: “Towards Sustainable Marine Resources and Environment”

on: September 4th, 2019

at:

IPB International Convention Centre, Bogor This seminar is a scientific gathering event that will provide a media for sharing information, ideas, and knowledge from various stakeholders related to marine subjects, such as researcher, students, NGO, and government in marine scopes. There are several topics will be presented and discussed in this conference, those are: 1. Marine Science: bioecology-ecophysiology, marine and coastal ecosystem, large marine

ecosystem, marine bio-ecoregion, ITF studies, upwelling, fisheries oceanography, physical and biogeochemical of upwelling processes, coastal dynamics, ocean-atmosphere and climate change;

2. Marine Technology: marine instrumentation, robotics and automation, marine observation system (remote sensing, GIS, underwater acoustic) for spatial planning, underwater seascape;

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3. Marine Resources and Environment: marine fisheries; mariculture, marine harvesting system (incl. strategies and management) and post-harvest processing and industries, coastal and marine adaptation and mitigation to climate changes.

The series of programs will be held at the International Conference on Marine Sciences, into: 1. Keynote session The Plenary Sessions of the seminar is presentation of paper by main speakers from

national and international speakers which are pointed as keynote speakers. It is expected that at this symposium the Dr. Ir. Gellwynn Daniel Hamzah Jusuf, MSc (Main Secretary of the National Development Planning Agency/Bappenas) and Prof. Dr. Omar bin Yaakob (Universiti Teknologi Malaysia).

2. Oral sessions (oral presentation) The oral sessions contain invited speaker presentation, delivered separately in accordance with 3 different topics, followed by participant papers presentation. This session is a forum for dissemination of research and observation results in marine resources and environment, marine science, marine technology, and other related fields.

3. Poster sessions This session is flash presentation by poster participants. They also put the print of poster

on poster display which are prepared by committee.

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SPEAKERS Keynote:

Dr. Ir. Gellwynn Daniel Hamzah Jusuf, M.Sc Ministry of National Development Planning Agency/Bappenas

Prof. Dr. Omar bin Yaakob, C. Eng Universiti Teknologi Malaysia omaryaakob@utm.my The Present Status and Development the Ocean Energy in the Southeast Asia

Invited:

Dr. Hirosuke Hirano National Institute of Technology (KOSEN), Wakayama College hirano@wakayama-nct.ac.jp HEDORO (Sea sludge or Sediments) in Wakayama Kosen

Dr. Nurul Hazrina Idris University of Technology Malaysia nurulhazrina@utm.my Development of Coastal Altimetry Algorithm for Assessing the Sea Level and Significant Wave Height in the Southeast Asia

Dr. Eko Siswanto Japan Agency for Marine-Earth Science and Technology (JAMSTEC) ekosiswanto@jamstec.go.jp Observing Land-Ocean-Atmosphere Interactions from Space

Dr. Takahiro Osawa Yamaguchi University osawaunud@gmail.com Remote Sensing Application for Marine Sciences and Disasters Statue Now and Future In Indonesia

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SCHEDULE

INTERNATIONAL CONFERENCE ON MARINE SCIENCE IPB International Convention Center, Bogor, Jawa Barat, Indonesia

Wednesday, 4th September 2019

Time Program 07.30-08.30 Registration 08.30-08.40 Traditional Instrument/Music 08.40-08.45 Indonesian National Anthem 08.45-08.50 Oppening Prayer 08.50-09.00 Welcome Speech 1: Dr. Ir. Jonson L-Gaol, M.Si (Chairman of ICMS 2019)

09.00-09.10 Welcome Speech 2: Dr. Ir. Lucky Adrianto, M.Sc (Dean of Fisheries and Marine Science, IPB University)

09.10-09.20 Welcome Speech 3: Prof. Dr. Iskandar Z. Siregar (Directur of International Collaboration,IPB University)

09.20-09.30 Welcome Speech 4: Dr. Arief Satria (Rector of IPB University) 09.30-09.45 Traditional Dance

09.45-10.15 1. Keynote Speaker 1: Dr. Ir. Gellwynn Daniel Hamzah Jusuf, MSc (Main Secretary of the National Development Planning Agency/Bappenas)

10.15-10.45 2. Keynote Speaker 2: Prof. Dr. Omar bin Yaakob (Universiti Teknologi Malaysia)

10.45-10.50 Photo Session 11.05-12.00 Poster Sesion 12.00-13.00 Lunch Break & Praying 13.00-15.30 Paper Presentation Sesion 1 15.30-15.45 Coffee Break & Poster Sesion 15.45-17.45 Paper Presentation Sesion 2 17.45-18.00 ICMS Closing Ceremony

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LIST OF ABSTRACT

Oral Presentation Topic: Marine Resources and Environment Room: Ballroom

Time ID Paper Title Author

13.00-13.30 Invited Speaker: HEDORO (Sea sludge or Sediments) in Wakayama Kosen

Dr. Hirosuke Hirano

13.30-13.38 MF128 Water And Sediment Quality Affecting Unsustainable Sandfish (Holothuria scabra) Fisheries in Ringgung, Lampung Bay

Etty Riani, Tun Tedja Irawadi, Adi Winarto, Ramadhona Saville

13.38-13.46 MF110 Nuclear Technique for Detection Saxitoxin in Shellfish Using Receptor Binding Assay (RBA) Method in Lampung Bay

Tri Retno Dyah L, Untung Sugiharto, Muawanah Tajri, Agustin Sumartono

13.46-13.54 MF112 Biodegradation of Aliphatic Components Waste of Oil Sludge by Microsymbiont Sponge Niphates Sp.

Ismail Marzuki, Muhammad Chaerul, Erniati, Asmeati, Irwan Paserangi

13.54-14.02 MS109 Season Effect of Spatial Distribution Macro Debris on the Coastal of Tunda Island, Banten

Adinda Maharani, Lintang Permata S, Mega Laksmini S, M. Rudyansyah I

14.02-14.10 Discussion 14.10-14.18 MF119 Baseline Concentration of Polonium-210 (210Po) in

Several Biota from Jakarta Bay Murdahayu Makmur, Wahyu Retno Prihatiningsih, Mohamad Nur Yahya

14.18-14.26 MF123 Vertical Distribution of Heavy Metals in the Cimanuk Delta Sediments, Indramayu, West Java

Rina Zuraida, Purnomo Rahardjo, Riza Rahardiawan

14.26-14.34 MF111 Polycyclic Aromatic Hydrocarbons in Mangrove Sediments from the Sebong Bay, Bintan Island, Indonesia: Distribution, Sources And Ecosystem Risk Assessment

Dede Falahudin, Ulfah Lutfiani, Zahidah, Deny Yogaswara, Ita Wulandari, Yeni Mulyani, Junianto, Khozanah Munawir, Edward

14.34-14.52 Discussion 14.52-15.00 MF104 Ecological Status of Target Fish Inside and Outside

Marine Conservation Area of Batbitim, Misool, Raja Ampat

Ridwan Sala, Hendrikson Y. Dasmasela, Dedi Parenden, Dwi Marsaoly, Daud Orisu, Renika Br. Tarigan

15.00-15.08 MF105 The Relationship Between Shrimps Production and Mangrove Ecosystem in Indramayu Regency

Maulia Rizky Dheanisa, Tuty Handayani, Nurul Sri Rahatiningtyas

15.08-15.16 MF118 Mangrove Density Level and Area Change Analysis in Small Islands (Case Study: Untung Jawa Island, Seribu Islands, DKI Jakarta)

Riza Pasaribu, Nadya Cakasana, Hawis Maduppa, Beginer Subhan, Dondy Arafat, Siddiq Sangadji, Monika Savana

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Time ID Paper Title Author

15.16-15.24 MF113 Productivity and Decomposition Rate of Rhizophora mucronata and Avicennia alba Litter Based on Environment Characteristics in Muara Gembong.

Rizky Eko Muliawan, Tri Prartono, Dietriech Geoffrey Bengen

15.24-15.32 Discussion 15.32-15.45 Coffee Break & Poster Sesion 15.45-15.53 MF101 Analysis of The Area Affected by The Tsunami in

Pandeglang, Banten: A Case Study of the Sunda Strait Tsunami

Wanda Laras Farahdita, Hendry Syahputra Ropinus Siagian

15.53-16.01 MF102 Assessing Lombok Earthquakes Impacts on Coral Reefs Ecosystem at Nusa Penida, Bali

Camellia Kusuma Tito, Eghbert Elvan Ampou, Fikrul Islamy

16.01-16.09 MF106 Impacts of Lili Tropical Cyclone on Waves and Weather System Over Indonesian Maritime Continent

Reynold Mahubessy, Muhammad Iqbal, Gandhi Mahendra, Aries Kristianto

16.09-16.17 Discussion 16.17-16.25 MT113 Identification of Shoreline Changes in Badung

Regency, Bali, Indonesia Using Sentinel 2A Satellite Data

T Osawa, N Pujianiki, IGRM Temaja, NG Antara

16.25-16.33 MF117 Study on Shoreline Changes in Sangsit Region, Bali Province

Nyoman Natih, Riza Pasaribu, Siddiq Sangadji, Emylia Kusumaningrum

16.33-16.41 MF121 Landuse Change and Shoreline Dynamic After 13 Years of Tsunami in Pangandaran, Indonesia

Niken Gusmawati, Dwiyoga Nugroho

16.41-16.49 Discussion 16.49-16.57 MF120 Development of Ocean Thermal Energy Conversion

in Lembata Flores Sea Mutiara, Agus S.Atmadipoera, Undang Hernawan

16.57-17.05

MS141

Thermal Dispersion Model of Cooling Water Discharges From Industrial Activities Of Steam Power Plants (PLTU) on The North Coast of Paiton, East Java

M Yudha Fikri, Agus S Atmadipoera, I Wayan Nurjaya

17.05-17.13 MS123 Rainfall Analysis in The Indian Ocean by Using 6-States Markov Chain Model

Miftahuddin, Maulidawani

17.13-17.21 MF125 Sustainable Tourism Development in Kepulauan Seribu

Mira, Umi Muawanah

17.21-17.29 MF103 Analysis of Squid Fisheries Bioeconomic Models (Loligo Spp, Lamarck 1798) in Pelabuhan Perikanan Nusantara Kejawanan (PPNK) Cirebon City, West Java

Muhamad Nur Purnama, Dewi Susiloningtyas, Abinawanto, Tuty Handayani

17.29-17.37 Discussion Topic: Marine Science Room: Meeting Room A

Time ID Paper Title Author

13.13.30 Invited Speaker: Remote Sensing Application for Marine Sciences and Disasters Statue Now and Future In Indonesia

Dr. Takahiro Osawa

13.30-13.38 MS151 The Effect of Mikroalgal Diet on Growth and Histological Structure of Wader Pari (Rasbora Lateristriata Bleeker, 1854) Intestine

Yessi Ayu Putri Manganang, Ariel Hanaya, Bambang Retnoaji

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Time ID Paper Title Author

13.38-13.46 MS108 Study of Microfauna Foraminifera as Bioindicator for Coral Reef Condition in Tambelan Islands, Riau Islands Province

Dynda Romika Junita, Aida Sartimbul, Luli Gustiantini

13.46-13.54 MS110 Study of Benthic Foraminifera on It Connection with Environmental Condition in Bidadari Island, Kepulauan Seribu.

Vina Zubaida, Aida Sartimbul, Suhartati M Natsir

13.54-14.02 MS114 Anti-Mycobacterium Compound Derived from Erythrobacter sp. Isolated from Callyspongia Aurizusa

Tutik Murniasih, Ceicilia Cindhy, Endang Sukara

14.02-14.10 Discussion 14.10-14.18 MS143 Diversity and Role of Macroalgae on Kendari Bay

and Its Surrounding, South East Sulawesi Tri Handayani

14.18-14.26 MS112 Analysis of Mangrove Ecosystem Treatments on The Existence of Fish Larvae in Semarang and Demak

Ambariyanto, Jusup Suprijanto

14.26-14.34 MS128 Anguilla Bicolor (Mcclelland, 1844) Swim Bladder as Important Organ for Reflecting Acoustic Wave

Ariel Hananya, Sri Pujiyati, M. Hasbi S, Bambang Retnoaji

14.34-14.52 MS102 The Utilization Status of Madidihang Fish (Thunus albacaress) in Morotai Island Regency

Marselius Talahatu, Dewi Susiloningtyas, Tuty Handayani, Sugeng Budiharsono

14.52-15.00 MS139 The Potential Role of Eutrophication, Tidalvand Climatic on the Rise of Algal Bloom Phenomena in Jakarta Bay

Tumpak Sidabutar, Endang S. Srimariana, Sam Wouthuyzen

15.00-15.08 Discussion 15.08-15.16 MS122 Determination of Coral Reef Rehabilitation Areas

on Pahat Island, Anambas Islands Dondy Arafat, Beginer Subhan, Novit Rikardi, Hawis Madduppa, Prakas Santoso, Muhammad Adip Setiawan, Mufti Aprizan, Ridho Zulfikar Wicaksono, Budi Prabowo

15.16-15.24 MS138 Assessment of Coral Reefs Health in Nature Recreation Park (Twa) Sangiang Island-Banten

Idris

15.24-15.32 Discussion 15.32-15.45 Coffee Break & Poster Sesion 15.45-15.53 MS125 Effect of Regional Oceanographic Processes to the

Distribution of Radionuclides in Coastal of Kalimantan

Wahyu Retno Prihatiningsih, Murdahayu Makmur, Heny Suseno, Mohamad Nur Yahya

15.53-16.01 MS111 Abrasion Hazard of Senindara Area, Bintuni Bay by Numerical Model

Undang Hernawan, Fauzi Budi Prasetio, Rahayu Kusuma Risdianto

16.01-16.09 MS127 Variation of Seawater Properties and Bioacoustics on Tidal-Scale at the Entrance of Padangbai Lombok Strait

Agus Saleh Atmadipoera, Nyoman Natih, Yulianto Suteja, Marlin Crisye Wattimena, Vaneasa Masoleh, Yulina Pranoto, Dewa Adiyathma, Priska Widiastuti, Sri Ratih Deswanti, Andhita Triwahyuni, Hana Watari, Amandangi Wahyuning Hastuti, Asep Mamun, Anda Vladoiu, Chonnaniyah

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Time ID Paper Title Author

16.09-16.17 Discussion 16.17-16.25 MS104 Observation and Numerical Models of

Temperature and Chlorophyll-A as Upwelling Indicator in Bali Strait Indonesia

WE Rintaka, B Priyono

16.25-16.33 MS126 Sea Surface Temperature Trends and Coastal Upwelling in Banda Sea

Herlambang Aulia Rachman

16.33-16.41 MS105 Upwelling Event in the Northern Arafura Sea: From Observation and Numerical Model

Agits A F, Agus S Atmadipoera, Rina Zuraida

16.41-16.49 MS146 Upwelling Index Along the South Coast of Java from Satellite Imagery of Wind Stress and Sea Surface Temperature

Yuli Naulita, Risti Endriani Arhatin, Nabil

16.49-16.57 Discussion 16.57-17.05 MS147 Geostrophic Currents in Northern Lembata

Waters: From Observation (Otec Cruise) in September-October 2017

Nyoman Metta N Natih, Muhammad Iqbal Fauzi Nipsan, Yani Permanawati, Undang Hermawan

17.05-17.13 MS115 Eddy-Induced Mixing in The Mesoscale Ocean Albert Sulaiman 17.13-17.21 MS120 Velocity and Pattern of Water Flow Within The

Lagoon of Semak Daun in the Seribu Archipelago, Indonesia

Saenuddin, I Wayan Nurjaya, Dietrich G. Bengen, Tri Prartono, Irzal Effendi

17.21-17.29 MF115 Seasonally Volume, Heat, Salt, and Freshwater Transports Within Balikpapan Bay to Makassar Strait

Anom Sulardi

17.29-17.37 Discussion Topic: Marine Technology Room: Meeting Room B

Time Name Paper Title Author

13.13.30 Invited Speaker: Development of Coastal Altimetry Algorithm for Assessing the Sea Level and Significant Wave Height in the Southeast Asia

Dr. Nurul Hazrina Idris

13.30-13.38 MT140 Spatio-Temporal Waveform Retracking Analyses of Altimetry Satellite Data in Halmahera Sea

Maya Eria Br Sinurat, Bisman Nababan, Jonson Lumban Gaol

13.38-13.46 MT139 Waveform Retracking of Altimetry Satellite with Fuzzy Logic System in Natuna Waters

Rizki Dimas Permana, Bisman Nababan, James P. Panjaitan

13.46-13.54 MT132 Spatial and Temporal Variability of Geostrophic Currents in the Indo-Australian Basin Using Gridded Argo Float Data

Julian Saputra, Jonson Lumban-Gaol, James P Panjaitan, Agus Saleh Atmadipoera

13.54-14.02 MT145 Review Inundation Mapping in Coastal Area of Jakarta Using Synthetic Aperture Radar and Landsat 8

Asmadin, Vincentius P Siregar, Ibnu Sofyan, Indra Jaya, Antonius Bambang Wijanarto

14.02-14.10 Discussion 14.10-14.18 MT138 Gis-Based Spatio-Temporal Analysis on Yellow Fin

Tuna Fishing Catch in Western Indian Ocean Nurholis, Jonson Lumban-Gaol, Achmad Fachrudin Syah

14.18-14.26 MT141 Big Eye Tuna Fishing Ground Analysis Using Oceanography Feature in Eastern Indian Ocean

Atika Kumala Dewi, Jonson Lumban-Gaol, Vincentius P.

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Time Name Paper Title Author

Siregar, Agus Saleh Atmadipoera

14.26-14.34 MT144 Prediction of Fishing Zone Potential by Utilize Visible Infrared Imaging Radiometer Suite (VIIRS) Sattellite Sensor in Java Sea

Dominggus S.H.L.M.K Awak, Jonson Lumban Gaol, Dony Kushardono

14.34-14.52 MT142 Comparison of Several Classification Algorithms on Seagrass Distribution Mapping Based on Project by Applying Several Segmentation Scales in Pajenekan Waters, South Sulawesi

Turissa Pragunanti Ilyas, Bisman Nababan, Hawis Madduppa, Dony Kushardono

14.52-15.00 MT135 Analysis of Benthic Habitat Classification Using High Resolution Satellite Imagery in Sebaru Besar Island, Kepulauan Seribu

Vincentius P. Siregar, Syamsul Bahri Agus, Adriani Sunuddin, Riza A. Pasaribu, M. Sidik Sangadji, Ayub Sugara, dan Esty Kurniawati

15.00-15.08 Discussion 15.08-15.16 MT102 Multiple Attenuation Methods in Short-Offset 2D

Marine Seismic Data : a Case Study Cendrawasih Bay

Naufal H. Yuza, Tumpal B. Nainggolan, Henry Munandar Manik

15.16-15.24 MT136 Detection And Mapping of Km Sinar Bangun Shipwreck Using Multibeam Echosounder in Toba Lake Waters

Harjo Susmor, Gentio Harsono, Henry Munandar Manik, La Elson

15.24-15.32 Discussion 15.32-15.45 Coffee Break & Poster Sesion 15.45-15.53 MT114 Developing Signal Processing of Echo Sounder for

Measuring Acoustic Backscatter Henry Munandar Manik, Yasushi Nishimori, Yoshihiro Nishiyama, Takuto Hazama, Akinori Kasai, Randi Firdaus, Andi Yaodi NY

15.53-16.01 MT115 Evaluation of ADCP Backscatter Computation for Quantifying Suspended Sediment Concentration

Henry Munandar Manik, Susilohadi, Randi Firdaus

16.01-16.09 MT137 Measurement of Foot of Slope the Eauripik Rise Using Multibeam Echosounder in Northern Papua Waters

La Elson, Henry Munandar Manik, Udreck

16.09-16.17 MT120 Sound Characteristic of Procambarus clarkii Muhammad Hisyam, Totok Hestirianoto, Indra Jaya

16.17-16.25 Discussion 16.25-16.33 MT121 Comparison of Seahorse (Hippocampus kuda)

Target Strength Based on The Presence of Brood Pouch: a Dorsal and Ventral Aspect Hydroacoustic Experiments Using Artificial Neural Network

Dony Apdillah, Indra Jaya, Henry Munandar Manik, Totok Hestirianoto, Muhammad Iqbal, Mahesa Glagah Agung Satria

16.33-16.41 MT122 Comparison of Zooplankton Abundance Estimation Using Bongo Plankton Net Methods and Underwater Acoustic Methods

Ellis N Ningsih, Amanda AP Febrianti, Riris Aryawati, Freddy Supriyadi

16.41-16.49 MT123 Study of Fish Density Using Hydroacoustic Techniques in the Waters Around Rote Island, East Nusa Tenggara

Mayrani Tika Mulyana, Indra Jaya, Henry Munandar Manik

16.49-16.57 MT211 Spatial Distribution of Schooling Fish Volume Backscattering Strength in Java Sea

Gusti Bagus Putra Cahyana, Sri Pujiyati, Mohamad Natsir

16.57-17.05 Discussion 17.05-17.13 MT108 Banten Bay Water Quality Measurement Using

Hydrocolor: Comparative Experimental Study Muta Ali Khalifa, Mustahal, Adi Susanto, Forcep Rio Indaryanto, Ani Rahmawati, Dessy Aryani, Muhlisin,

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Time Name Paper Title Author

Yana Suharyana, Yunia Rahayuningsih

17.13-17.21 MT109 The Effects of Rabbitfish (Siganus canaliculatus) Existence in Polyculture System and Feed Type Against the Growth Performance of Trevally (Caranx sexfasciatus) in Floating Net Cage

Carolus P. Paruntu, Suria Darwisito, Antonius P. Rumengan, Defny S. Wewengkang, Henki Rotinsulu

17.21-17.29 MT128 Development of Mobile and Quantitative Phytoplankton Concentration Measurement and Its Application

Indra Jaya, Triana, Muhammad Iqbal

17.29-17.37 Discussion

Topic: Marine Resources and Environment, Marine Science; Marine Technology Room: Meeting Room Adenium

Time Name Paper Title Author

13.00-13.30 Invited Speaker: Observing Land-Ocean-Atmosphere Interactions from Space

Dr. Eko Siswanto

13.30-13.38 MS131 Hydrographic Measurement in Southern Sulawesi Sea: from KRI Spica Cruise 2016

Agus Saleh Atmadipoera, Gentio Harsono, Dikdik, Nadia

13.38-13.46 MS132 Oceanographic Characteristics in the Sunda Shelf Region (Natuna and Java Seas)

Agus Saleh Atmadipoera, Apriansyah, Ishak Jumarang, Risko

13.46-13.54 MS135 Evidence of North Indian Ocean Intermediate Water Along the Northern SAVU Sea From Indomix 2010 Cruise

Agus Saleh Atmadipoera, Ariane Koch-Larrouy, Yannis Cuypers, Indra Jaya

13.54-14.02 Discussion 14.02-14.10 MS144 Freshwater Intrusion During Ebb and Flood Tide in

the Balikpapan Bay Ivena Benita, Yuli Naulita, I Wayan Nurjaya

14.10-14.18 MS124 Study of Water Discharge in the Ulee Lheue Port Channel, Indonesia

Ichsan Setiawan, Faliqul Isbah, Muhammad Muhammad, Syarifah Meurah Yuni, Syahrul Purnawan, Akram Akram, Yopi Ilhamsyah

14.18-14.26 MS106 Indonesian Throughflow Water Along Eastern Pathway From a CTD Argo Float

Aulia Rahma, Agus Saleh Atmadipoera, Yuli Naulita

14.26-14.34 MS107 Variability of ITF- Front at 110 in The Indo-Australian Basin : From Ctd Argo Float Data

Iis Susiani, Agus Saleh Atmadipoera, I Wayan Nurjaya

14.34-14.52 Discussion 14.52-15.00 MF108 Species Composition, Stock Density of Demersal

Fish and Shrimp in Tiworo Strait, Southeast Sulawesi

Nurulludi, Titin Siswantining, Duranta Kembaren, Tri Enawati

15.00-15.08 MF116 Observation of Fish Around Seagrass Ecosystem Using a Stationary Underwater Visual System

Dedek Rahmad D Rizki, Adriani Sunuddin, Muhammad Iqbal, Indra Jaya

15.08-15.16 MF124 Vulnerability of Fish Resources in the Mahakam Estuary

Aisyah

15.16-15.24 MF114 Vibrate-Stunt-Lare Totok Hestirianoto, Mulyono S Baskoro

15.24-15.32 Discussion

15

Time Name Paper Title Author

15.32-15.45 Coffee Break & Poster Sesion 15.45-15.53 MT125 N3-AUV: Design and Implementation Dhea Fajriati Anas, Syifa

Afnani Santoso,Yulianti Ratnasari, Nurhaliza Amalia Lestari, Alifyando Firmandi Pandewo, Muhammad Iqbal, Indra Jaya

15.53-16.01 MT101 Coastal Spatial Analysis Study Using Drone Imagery on Panjang Island, Jepara Regency

Johannes R. Sitompul, Hendry S. R. Siagian

16.01-16.09 MT147 Implementation of Swarm Intelligence Algorithm on Autonomous Surface Vehicle (ASV)

Chaidar Aji Nugroho, Ahmad Vidura, Muhammad Rizky Rahman, Muhammad Iqbal, Mahesa Glagah Agung Satria, Indra Jaya

16.09-16.17 MT148 Real Time Coral Fish Identification Using Deep Learning

Insan Maulana Yusup, Muhammad Iqbal, Indra Jaya

16.17-16.25 MT150

Ocean Wave Meansurement and Wave Energy Calculating using Overtopping Power Plant

Ahmad Vidura, I Wayan Nurjaya, Muhammad Iqbal, Indra Jaya

16.25-16.33 Discussion 16.33-16.41 MT127 Development of Operational Coastal Observation

System for the Safety of the Navigation and Fishing

Indra Jaya, Muhammad Iqbal, Billi Kusumah, Mahesa Glagah Agung Satria, Ratih Deswati

16.41-16.49 MT130 Graphical User Interface Development for Nusantara-Autonomous Surface Vehicle (N-ASV)

Mahesa Glagah Agung Satria, Indra Jaya, Muhammad Iqbal

16.49-16.57 MT126 Prospect of Using Acoustic Technique for Quantifying the Degree of Bioeroders in Coral Reef Ecosystem

Indra Jaya, Sekar Asri Mauluddiani, Sri Pujiati, Beginer Subhan

16.57-17.05 MT124 Application of Acoustic Scientific Echosounder EK500 to Detect Fish Density Distribution in the Waters at the Eastern Region of Alor Island

Izmiyaqin, Indra Jaya, Henry Munandar Manik

17.05-17.13 Discussion 17.13-17.21 MT104 Common Reflection Surface Method in Low Fold

Coverage Seismic Data of Complex Marine Geological Structures

Destiana Safitri, Tumpal B. Nainggolan, Henry Munandar Manik

17.21-17.29 MT105 Acoustic Impedance Model-Based Inversion to Identify Target Reservoir: Nias Waters Case Study

Maychel Erryansyah, Tumpal B. Nainggolan, Henry Munandar Manik

17.29-17.37 MT107 Identification of Yapen Fault Zone Using 2D Marine Seismic Data and Well Analysis

Tumpal B. Nainggolan

17.37-17.45 Discussion

16

Poster Presentation Topic: Marine Resources and Environment, Marine Science; Marine Technology Room: Ballroom

Time Name Paper Title Author

11.05-12.00 & 15.30-15.45

MF222 Biological Aspects and Growth Parameter of Indian Scad (Decapterus russelli, Rupell, 1928) in the South of China Sea

Ria Faizah, Lilis Sadiyah, Wijopriono

MF227 Nutritional Value and Mineral Content of Seaweed from Binuangeun Beach, Indonesia and Potential Use As Fish Feed Ingredient

Lusi Herawati Suryaningrum, Reza Samsudin

MS203 Influence of Cross Equatorial Northerly Surge (CENS) on Variability of Chlorophyll-A and SST in Karimata Strait Waters.

Tyas Tri Pujiastuti

MS221 Molecular Phylogeography Study of the Deep-Sea Asteroids Ceramaster Patagonicus and Ceramaster Japonicus in the North Pacific Ocean

Masaki Yamamoto, Yuki Kamito, Mikihito Arai, Toshihiko Fujita, Christopher L. Mah, Davin H. E. Setiamarga

MS129 Biodiversity of Macroalgae in Pari Island Endang Sunarwati Srimariana, Mujizat Kawaroe, Dea Fauzia Lestari, Aditya Hikmat Nugraha

MS142 Seasonal Distribution of Phosphate Within Tallo Estuary, at the Northern Coast of Makassar, South Sulawesi

Rastina, I Wayan Nurjaya, Tri Prartono, Harpasis Slamet Sanusi

MS148 Coral Disease at Mansuar Island, Raja Ampat, Papua, Indonesia

Beginer Subhan, Dondy Arafat, Fadhilah Rahmawati, Q Muhammad Royhan, Hawis Madduppa, Prakas Santoso, Budi Prabowo

MS250 Potential of Associative Bacteria Isolates from Seagrass Ecosystem

Meutia Samira Ismet, Endang Sunarwati Srimariana, Yuni Puji Hastuti, Elka Dwi Jayenti, Peni Ismiati, Rasyid Prasetyo Utomo

MT212 Target Strength of Freshwater Fish Using Single Beam Echosounder

Sri Pujiyati, Putra E. Karo-karo, Andi Y. N. Yaman, Suci Khairiza, Bendrianto, M. Hasbi Sidqi, Riswan Rizqyawan

MT233 Level Of Friendliness of The Bouke Ami Fishing Gear Technology at The Fishery Port Nusantara (PPN) Kejawanan in Cirebon

Andi Perdana Gumilang, Evi Susilawati

MT246 The Application of Geotextile Tube Structure for Coastal Protection in Pamekasan Madura

Vivi Yovita Indriasari, Dwiyoga Nugroho, Agus Sofyan, Dendy Mahabror, Koko Ondara, Rudhy Akhwady

MT129 Deep Learning for Seagrass Coverage Estimation Using Autonomous Surface Vehicle

Mahesa GA Satria, Indra Jaya, Muhammad Iqbal, Karlisa Priandana

17

Time Name Paper Title Author

MT149 Study of Vegetation Index Algorithm and Classification Model for Mangrove Derived from Landsat Tm And Etm+ (Case Study at Kabupaten Berau, East Kalimantan)

Risti Endriani Arhatin, Vincentius P. Siregar, Richardus F. Kaswadji

MT251 Distribution of Fishing Vessels Derived Visible Infrared Imaging Radiometer Suite (VIIRS) Sensor and Vessel Monitoring System (VMS) in Java Sea

Jonson Lumban-Gaol1*, Achmad Fachruddin Syah2, Risti Endriani Arhatin1, Emylia Eka Kusumaningrum1 and Ruben Van Beek1

MT252 Identifying Illegal Fisheries in Indonesian Marine Protected Areas

Ruben Van Beek*, Jonson Lumban-Gaol, Syamsul Bahri Agus

MT253 Enrichment and Contamination of Heavy Metals in the Surface Sediments of North Sumatra

Meta Aprianih, Tri Prartono, Mochammad Tri Hartanto, Santi Susanti

18

ICMS 2019

INTERNATIONAL CONFERENCE ON MARINE SCIENCE “Towards Sustainable Marine Resources and Environment”

KEYNOTE SPEAKER

4 SEPTEMBER 2019

19

OCEAN ENERGY: THE NEW FRONTIER IN SOUTHEAST ASIA

Omar bin Yaakob Marine Technology Centre, Universiti Teknologi Malaysia, Johor Bahru-Malaysia

Email: omaryaakob@utm.my

Abstract

The declining availability of traditional sources of energy and the harmful effects of fossil fuels have spurred the development of various forms of renewable energy. Ocean Renewable Energy (ORE) technology is relatively new. Energy can be harnessed from the temperature difference between the cold bottom and warm surface water (OTEC), the tidal range fluctuations, tidal streams flow, ocean waves and the salinity gradient between salty and fresh water. The present ORE development in South East Asia is mainly focused on resource assessment and development of laboratory and small scale prototypes of the various devices. Indonesia and the Philippines are embarking on larger scale projects. Because of the low tidal and wave resources large scale grid connected projects are very challenging. Most pockets of high tidal streams are located far from national grids connections while the regions of high tidal streams speeds are normally restricted channels making arrays impossible. For wave energy devices, the resource-device matching is crucial. Conflicting uses of the sea restrict also large scale arrays. Therefore, it is more practical to tailor development towards small local grids for remote islands or coastal communities around the region. On the other hand, OTEC seems to be the most promising for base load. There is a need for establishment of a sound policy environment and institutional framework including legal, environmental, economics, as well as funding mechanisms for pioneering R&D initiatives.

20

ICMS 2019

INTERNATIONAL CONFERENCE ON MARINE SCIENCE “Towards Sustainable Marine Resources and Environment”

INVITED SPEAKER

4 SEPTEMBER 2019

21

HEDORO (SEA SLUDGE OR SEDIMENTS) IN WAKAYAMA KOSEN

Hirosuke Hirano National Institute of Technology (KOSEN), Wakayama College

Email: hirano@wakayama-nct.ac.jp

Abstract In this speech, I’ll talk about “HEDORO (Japanese name as sludge or sediment)”. Origin of my study was decomposition of HEDORO by microorganisms and micro-bubbles (My theme in university’s student age), I considered to plan the best decompose way from characteristics of HEDORO by this experiment. In present study, I’m trying to reproduce HEDORO’s characteristics artificially same as natural one. Therefore, I will describe detail of study “Artificial sludge”; which is mixing these materials organic matter (Dry yeast, substitute of microorganism’s corpse), inorganic matter (Zeolite, substitute of sand which has aluminum and silicon) and sulfide (Origin of HEDORO's smell, it was used Na2S・9H2O). And others, I’m studying environmental effects from HEDORO. I’m working in Wakayama KOSEN near from Pacific Ocean, so I collect samples from seaside in every month and researching change of characteristics (Organic matter and inorganic matter as aluminum, silicon, iron and sulfide), from July 2016. In present, I understand that HEDORO’s characteristics are not change drastically in usual, but is change drastically if getting effect (Example is weather, water temperature, and seaweed. And it may have other cause as unknown). Future plan, I want to connect these results for regional contribution in Wakayama.

22

OBSERVING LAND-OCEAN-ATMOSPHERE INTERACTIONS FROM SPACE

Eko Siswanto1,2,3 1Earth Surface System Research Center (ESS) 2Research Institute for Global Change (RIGC)

3Japan Agency for Marine-Earth Science and Technology (JAMSTEC) E-mail: ekosiswanto@jamstec.go.jp

Abstract Bounded by densely populated countries and located between the Pacific and Indian Oceans, the Southeast Asian marine ecosystems are vulnerable to both anthropogenic activities and climate variations of El Nino/La Nina and Indian Ocean Dipole. Besides by direct atmosphere-ocean physical interactions, river systems and atmosphere can be the routes through which human activities and climate changes indirectly impact the marine ecosystems in the Southeast Asian region. For the purpose of marine environment and ecosystem management, identifying the impact of human activities and climate changes on marine ecosystems needs to be conducted based on long-term observations with high spatiotemporal resolution. Such a long-term observation can only be done by means of remote sensing method. Utilizing almost two-decade multisensor satellite observations, presentation will introduce previous and recent studies showing how remote sensing from space plays a role in delineating spatiotemporal impacts of human activities and climate variations on the marine environment and ecosystem in the southeast Asian region. Keywords: remote sensing, ocean color, anthropogenic and natural perturbations

23

REMOTE SENSING APPLICATION FOR MARINE SCIENCES AND DISASTERS: STATUE NOW AND FUTURE IN INDONESIA

Takahiro Osawa1,2,3

1Center for Remote Sensing and Ocean Sciences (CReSOS), Udayana University, Indonesia 2Center for Research and application of Satellite Remote sensing (YUCARS), Yamaguchi

University, Japan 3Satellite Application and Operations Center (SAOC), Japan Aerospace Exploration Agency

(JAXA), Japan Email: osawaunud@gmail.com

Abstract

The utilization and management of marine space using satellite remote sensing and marine GIS is essential for sustainable ocean conservation and marine resource utilization and the development. The Ocean products using new satellite remote sensing data such as Suomi, Sentinel 3, Himawari-8/9 and GCOM-C (SGLI) are showed and compared with some buoy data in Indonesia and the possibility the data sets with assimilation models developed so far an overview of the information prediction system for fishery optimal area. Furthermore, some application study using Synthetic Aperture Radar; SAR are introduced for ocean sciences such as oil spill and internal wave in Indonesia and some disaster (Tsunami) areas Lombok, Palu, Sulawesi, and Sunda Strait in Indonesia. Keywords: satellite remote sensing, marine GIS, and sustainable utilization of fishery resource, Synthetic Aperture Radar (SAR), disaster

24

ICMS 2019

INTERNATIONAL CONFERENCE ON MARINE SCIENCE “Towards Sustainable Marine Resources and Environment”

ORAL PRESENTATION

4 SEPTEMBER 2019

25

ICMS 2019

INTERNATIONAL CONFERENCE ON MARINE SCIENCE “Towards Sustainable Marine Resources and Environment”

Topic 1: Marine Resources and Environment

26

ID: MF128

WATER AND SEDIMENT QUALITY AFFECTING UNSUSTAINABLE SANDFISH (Holothuria scabra) FISHERIES IN RINGGUNG, LAMPUNG BAY

Etty Riani1*, Tun Tedja Irawadi2, Adi Winarto3, Ramadhona Saville4

1Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia

2Department of Chemistry, Faculty of Mathematics and Natural Sciences, IPB University, Bogor, Indonesia

3Faculty of Veterinary Medicine, IPB University, Bogor, Indonesia 4Tokyo University of Agriculture

*Corresponding author: etty_riani_harsono@yahoo.com

Abstract

As a sensitive marine organism, Sandfish (Holothuria scabra) habitat has characteristics as seagrass, coral reefs, and mangrove ecosystem. Sandfish lives in an unpolluted environment. Based on last study and an interview with coastal communities on Ringgung in Lampung Bay, nowadays Sandfish is getting harder to find. Even though Sandfish has become an important marine commodity trade and as a source of income generation for coastal communities in this area. The aim of this study was to evaluate environmental conditions and to correlate with a low catch of Sandfish in Ringgung, Lampung Bay. The research was conducted by analysing water and sediment quality, observing the surrounding conditions, and comparing them with previous data. This study results showed that there is an increase in the concentration of pollutants such as nutrients, heavy metals, organic compounds in the water and in the sediment. The pollution will affect the life of Sandfish. In addition, there are indirect disturbances such as tourism activities which result in an effect on life in the water, including Sandfish, and affecting unsustainable sandfish. Keywords: sandfish, water and sediment quality, pollutants, unsustainable, Ringgung

27

ID: MF110

NUCLEAR TECHNIQUE FOR DETECTION SAXITOXIN IN SHELLFISH USING RECEPTOR BINDING ASSAY (RBA) METHOD IN LAMPUNG BAY

Tri Retno Dyah L.1*, Untung Sugiharto1, Muawanah Tajri2, Agustin Sumartono1

1Centre for Isotopes and Radiation Application, National Nuclear Energy Agency, Jl .Lebak Bulus Raya No.94 Jakarta 12440, Indonesia

2Balai Besar Perikanan Budidaya Laut Lampung, Jalan Yos Sudarso, Desa Hanura, Padang Cermin, Pesawaran 35454

*Corresponding author: tretno@batan.go.id

Abstract

Technique nuclear using receptor binding assay (RBA) to detect saxitoxin, a poison paralytic shellfish poisoning (PSP) in the shellfish has been carried out in the Lampung bay. The research was conducted when the sea water color changed to brown and fish deaths occured in these waters in 2012, 2014 and 2015, it is suspected that red tide occurred. Analysis of PSP toxins in Indonesia usually is done by using the mouse bioassay, this method has a minimum detection limit of 40 µg STX/100 g wet shells. An alternative method of determining the content of PSP toxins in green mussels, feather cockle and pearl mussels which specific, sensitive and rapid, urgently is needed, one method is the technique on Receptor Binding Assay (RBA). In this method 3H-saxitoxin is used as a tracer, this method is able to detect the PSP content to 1 µg STX/100 g of wet shells. Environmental parameters, the content of nutrients and plankton species were monitored during sampling.

Keywords: shellfish, RBA, saxitoxin, red tide

28

ID: MF112

BIODEGRADATION OF ALIPHATIC COMPONENTS WASTE OF OIL SLUDGE BY MICROSYMBIONT SPONGE Niphates sp.

Ismail Marzuki1*, Muhammad Chaerul2, Erniati3, Asmeati4, Irwan Paserangi4

1Chemical Engineering, University of Fajar, Makassar, South Sulawesi, Indonesia, 90231 2Infrastructure and Environmental Engineering Program, Fajar University, Makassar, South

Sulawesi, Indonesia 3Civil Engineering, Fajar University, Makassar, South Sulawesi, Indonesia

4Mechanical Engineering, Fajar University, Makassar, South Sulawesi, Indonesia *Corresponding author: ismailmz@unifa.ac.id

Abstract

Investigation has been carried out using a sponge as biodegradation of the aliphatic hydrocarbon component of crude oil sludge. The experiment was carried out by colonizing and making suspension of Bacillus pumilus strains GLB197 and Bacillus cohnii strains of DSM 6307, isolated from sponge Niphates sp. Both types of suspension microsymbiont mixed with sludge waste for 30 days. There are five biodegradation parameters observed, carried out every five days of interaction. Observation of three parameters, namely: pH, gas bubbles and fermentation odor, while the optical density of degradation media was measured using spectrometer-D20+ and degraded Aliphatic components measured using GC-MS. Observation of biodegradation parameters revealed there was a change in pH from seven to 6, formed gas bubbles, smelled of fermentation and increased optical density by an average of 35%. These four parameters occur during the interaction of 10-20 days of interaction in the media. There are 20 types of aliphatic components identified in the crude oil sludge waste. Analysis of four aliphatic components, namely Tridekana, Oktadekana, Triakosana, and Nonakosana decreased the average concentration of 48%.

Keywords: biodegradation, aliphatic hydrocarbons, oil sludge, microsymbiont, sea sponges

29

ID: MS109

SEASON EFFECT OF SPATIAL DISTRIBUTION MACRO DEBRIS ON THE COASTAL OF TUNDA ISLAND, BANTEN

Adinda Maharani*, Lintang Permata S, Mega Laksmini S, M. Rudyansyah

Marine Sciences, FPIK, Universitas Padjadjaran, Jl. Ir. Sukarno km. 21 West Java, Indonesia *Corresponding author: adinda0106@gmail.com

Abstract Marine Debris one of the environmental problems which today has become a world issue. Debris problems occur in some areas Tunda Island with low human activities, due to the currents and wind factors that can distribute the debris. Speed and direction of winds and currents in Indonesia influenced by season, so the season to give effect to the accumulation of debris. This study aims to determine the effect of the season on the distribution and potential sources of debris in the Tunda Island Coast. The research method used was survey and analysis of descriptive data. This study uses the software MIKE 21 to determine the pattern of currents and winds and the movement of the macro Debris particles. The season give effect to the distribution pattern of macro debris in Tunda Island. In East Season there was an increase in the weight of debris by 9 kg compared to West Season. There was an increase in several categories debris including the most likely to find items, fishing gear packaging materials, tiny trash and tree base material. The potential source that affects the presence of debris on the coast of Tunda Island, Banten is Ciunjung Estuary Keywords: small island, environmental problems, marine debris, distribution, season

30

ID: MF119 BASELINE CONCENTRATION OF POLONIUM-210 (210Po) IN SEVERAL BIOTA FROM JAKARTA BAY

Murdahayu Makmur*, Wahyu Retno Prihatiningsih, Mohamad Nur Yahya

Badan Tenaga Nuklir Nasional *Corresponding author: mdhayu@batan.go.id

Abstract This study focused on the determination of the 210Po, in several species of biota that commonly available in the Jakarta Bay. The sample consist of tuna, tenggiri (mackerel), kakap merah (red snapper), Shrimp and green mussel were collected in 2017. The concentration of 210Po in the edible part of that biota ranged from 9.05 ± 3.05 to 137.37±37 Bq/kg of fresh biota, and the highest activity was recorded for the green mussel and the lowest for tuna. The daily intake of 210Po from these biota varied between 0.24 and 14.27 Bq year-1. The estimated dose of 210Po intake ranged from 0.03 - 3.6 μSv year-1. This measurement contributes to the furthering of knowledge of 210Po, since no data exist in this region. Keywords: 210Po, baseline assessment, biota, radiological safety, Jakarta Bay

31

ID: MF123

VERTICAL DISTRIBUTION OF HEAVY METALS IN THE CIMANUK DELTA SEDIMENTS, INDRAMAYU, WEST JAVA

Rina Zuraida*, Purnomo Rahardjo, Riza Rahardiawan

Center for Geological Survey, Geological Agency, Marine Geological Institute *Corresponding author: rinazuraida@yahoo.com

Abstract This paper presents the changes in vertical distribution of heavy metals (Cr, Ni, Pb, Cu, Zn and Cd) from two sediment cores (CMK-09, 75 cm long, and CMK-10, 45 cm long) acquired off Kali Rambatan Baru, Cimanuk Delta, Indramayu, West Java. Heavy metal analyses were measured by atomic absorption spectrometer (AAS) and sediment age was determined by 210Pb method. Because the oldest age of deposition in core CMK-09 (1906 AD) was identified at 47.5 cm, and in core CMK-10 (1924 AD) at 27.5 cm, the age of the samples below the limits was calculated by assuming linear sedimentation rate. Concentration of Cr ranges from 16 to 47 ppm, Ni: 14 - 21 ppm, Pb: 15 - 210 ppm, Cu: 11 - 40 ppm, Zn: 53 - 77 ppm, and Cd: 0.033 - 0.480 ppm. Our study shows elevated concentration of Pb and Cd in the surface sediments of core CMK-09 and Pb, Cu and Zn in core CMK-10. The sediments of core CMK-09 show low degree of contamination, while the lower part of core CMK-10 show moderate to considerable degree of contamination that decreases to low degree of contamination on the surface sediments. Keywords: Cimanuk Delta, heavy metals, degree of contamination

32

ID: MF111

POLYCYCLIC AROMATIC HYDROCARBONS IN MANGROVE SEDIMENTS FROM THE SEBONG BAY, BINTAN ISLAND, INDONESIA: DISTRIBUTION, SOURCES AND ECOSYSTEM RISK ASSESSMENT

Dede Falahudin1*, Ulfah Lutfiani2, Zahidah2, Deny Yogaswara1, Ita Wulandari1, Yeni Mulyani3,

Junianto2, Khozanah Munawir1, Edward1 1Research Center for Oceanography, Indonesian Institute of Sciences, Jl Pasir Putih 1, Ancol

Timur, Jakarta Utara, Indonesia 2Fisheries Departement, Fisheries and Marine Science Faculty, Padjadjaran University,

Jatinangor, Indonesia 3Marine Science Department, Fisheries and Marine Science Faculty, Padjadjaran University,

Jatinangor, Indonesia *Corresponding author: dede.falahudin@lipi.go.id

Abstract

Surface sediments from a mangrove area in Sebong Bay, Bintan Island, Indonesia were analysed for polycyclic aromatic hydrocarbon (PAHs) to investigate distributions, origins, and potential ecological risk. Concentrations of PAH were measured using gas chromatography-mass spectrometry. Total PAHs (TPAH) ranged from 2.61 to 12.17 mg/kg dry weight. Individual PAHs level dominated by naphthalene 0.86 - 29.27 mg/kg dry weight. Sources and risk assessment of PAHs in mangrove sediments were determined based on diagnostic ratios and risk quotients (RQs) methods, respectively. The ratio plots indicate that PAH derived from petroleum origin, including the combustion of petroleum. It also means that the sediments were impacted human activity by maritime and oil transportation through Malacca Strait. The PAHs risk in the sediments asserted between low and moderate level.

Keywords: PAHs, sediment, Bintan Island, diagnostic ratio, risk quotient

33

ID: MF104

ECOLOGICAL STATUS OF TARGET FISH INSIDE AND OUTSIDE MARINE CONSERVATION AREA OF BATBITIM, MISOOL, RAJA AMPAT

Ridwan Sala1*, Hendrikson Y. Dasmasela1, Dedi Parenden2, Dwi Marsaoly1, Daud Orisu2, Renika

Br. Tarigan1 1Department of Marine Science, Faculty of Fisheries and Marine Science, University of Papua,

Manokwari, Papua Barat Province, Indonesia. 2Department of Fishery, Faculty of Fisheries and Marine Science, University of Papua,

Manokwari, Papua Barat Province, Indonesia. *Corresponding author: ridwansala@gmail.com

Abstract

Batbitim marine conservation area (MCA) of Misool, Raja Ampat has been set as area that is prohibited for fishing activities since 2005. The only activities allowed in that area are tourism and research activities. The difference in the management status between area inside the Batbitim MCA and outside the MCA might affect ecosystem components such as fish and coral reef in respective area. The present study aims to investigate ecological status of target fishes in the two areas. Data was collected by using underwater visual census at 5 sites, in which at each site 3 transects were placed at 10 m depth. Collected data were then used to assess ecological indices for the target fishes. It is found that there were 37 species of target fish belonging to 14 families. Diversity index of Shannon were found to be in the range between 0.99 (inside MCA) to 1.67 (outside MCA) and dominance index ranged between 0.26 (outside MCA) and 0.61(inside MCA). The abundance of individual target fish in each location varies between 960 ind.ha-1 (outside MCA) and 9413 ind.ha-1 (inside MCA). These results indicate that there is discrepancy between the ecological status of the target fish at locations inside and outside the MCA.

Keywords: target fish, ecological status, marine conservation area, Batbitim, Misool, Raja Ampat

34

ID: MF105

THE RELATIONSHIP BETWEEN SHRIMPS PRODUCTION AND MANGROVE ECOSYSTEM IN INDRAMAYU REGENCY

Maulia Rizky Dheanisa*, Tuty Handayani, Nurul Sri Rahatiningtyas

Geography, University of Indonesia, Depok, 16424, Indonesia *Corresponding author: maulia.rizky@ui.ac.id

Abstract

Shrimp is one of the agricultural commodities which has high economic value with extensive market value abroad and tends to increase. Shrimp production continues to increase. Shrimp production in Indramayu Regency in 2017 amounted to 191,919.41. This makes Indramayu Regency the largest producer of shrimp in West Java (BPS, 2017). Mangrove is an area that has a high contribution. Mangrove ecosystems have relevance to pond production. This study tries to analyse the value of shrimp production in Indramayu Regency and its effect on the mangrove ecosystem in Indramayu Regency. The method used to change mangroves is using 8 Landsat Image then 564 composite band with 1 km line, 2 km and 3 km from mangrove. Next to find out the production of shrimp using the results of interviews. Analysis of data taken by regression methods to see the closeness of the relationship between shrimp production and mangroves. The regression results between the distance of mangroves and the production yields get the equation y = 2.335x-0.563 with the value of R Square of 50.5%. This amount means that for every additional 1 km of mangrove, the sales margin will decrease by 0.563.

Keywords: shrimps, mangroves, production, landsat

35

ID: MF118

MANGROVE DENSITY LEVEL AND AREA CHANGE ANALYSIS IN SMALL ISLANDS (CASE STUDY: UNTUNG JAWA ISLAND, SERIBU ISLANDS, DKI JAKARTA)

Riza Pasaribu*, Nadya Cakasana, Hawis Maduppa, Beginer Subhan, Dondy Arafat, Siddiq

Sangadji, Monika Savana Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University *Corresponding author: rizapasaribu@apps.ipb.ac.id

Abstract This study was conducted to see changes in mangrove area using satellite images and the density level of mangrove based on satellite imagery and field surveys on Untung Jawa Island. The image data used was Landsat image data recording in 2000, 2005, 2010, 2015 and 2019. Apart from those, sentinel-2 recording images in April 2019 were also retrieved to be compared with field results data to see the density level and its accuracy. Image data analysis to determine the area and density value of mangroves was using the Normalized Difference Vegetation Index (NDVI) model. Measurement of mangrove vegetation in the field was obtained by the line plot transect method. The results of temporal image data analysis conveyed changes in mangrove area from 2000 (8.46 ha), 2005 (7.56 ha), 2010 (8.45 ha), 2015 (10.65 ha) and 2019 (6.89 ha). In 2019 the density level by NDVI analysis was dense, while the result of the field survey was categorized as very dense. The level of accuracy using remote sensing data is 92.5%. Through the results of the field survey, the mangrove diversity was relatively low, mangrove species on the island was very uneven, and the dominant species was Rhizophora mucronata. Keywords: mangrove, satellite image, NDVI, small islands, Untung Jawa

36

ID: MF113

PRODUCTIVITY AND DECOMPOSITION RATE OF Rhizophora mucronata AND Avicennia alba LITTER BASED ON ENVIRONMENT CHARACTERISTICS IN MUARA GEMBONG

Rizky Eko Muliawan*, Tri Prartono, Dietriech Geoffrey Bengen

Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia

*Corresponding author: rizkyekomuliawan@gmail.com

Abstract

Mangrove forests damage may decrease their function and ecological role in relation to litter production which support the sustenance of aquatic resources. This research aimed to estimate organic matter release based on litter decomposition of mangrove Rhizophora mucronata and Avicennia alba. The research was conducted at three stations in Pantai Mekar Village, Muara Gembong District for 60 days observation. Litter productivity and decomposition rate was measured using litter traps and litter bags. Mangrove C-organic content was analyzed using Lost on Ignition (LOI) method for litters, while N and P content were analyzed using Kjehdahl method and wet fogging. Litter productivity of R. mucronata and A. alba stands reached 4.68 and 7.11 g/m2/day1 respectively. Observed different rates of mangrove decomposition was due to the lignin content. The decomposition rate of R. mucronata and A. alba were Y=12.841e-0.382X (R2=0.97) and Y=11.958e-0.478X (R2=0.91) resepectively. Carbon, nitrogen and phospate elements of R. mucronata stands released at 811,044±88.33 kgC/ha/year, 27.17±3.03 kgN/ha/year and 3.26±0.53 kgP/ha/year respectively, while A. alba released 921.16±156.77 kgC/ha/year, 15.34±1.53 kgN/ha/year and 1.39±0.49 kgP/ha/year. R. mucronata stands contributed more elemental-nutrients of N and P than A. alba. The productivity and decomposition rate of A. alba litter was greater and faster than R. mucronata.

Keywords: decomposition, litter, mangrove, nutrients, organic matter, productivity

37

ID: MF101

ANALYSIS OF THE AREA AFFECTED BY THE TSUNAMI IN PANDEGLANG, BANTEN: A CASE STUDY OF THE SUNDA STRAIT TSUNAMI

Wanda Laras Farahdita*, Hendry Syahputra Ropinus Siagian Diponegoro University, Jl. Prof H. Sudarto, SH, Tembalang.

Telp/Fax (024)7474698 Semarang-50276 *Corresponding author: wl.farahdita@gmail.com

Abstract

Pandeglang is the second largest district with an area of 2,746.89 km2 or around 28.43 percent of the total area of Banten Province. District with a population that is fairly dense with a location directly adjacent to the Sunda Strait. Pandeglang District become a concern because one of the locations had an impact on the tsunami on December 22, 2018. Its position in the western waters and directly facing the Anak Krakatau Volcano, is very potentially vulnerable. The tsunami triggered by the volcanic activity of Anak Krakatau Volcano. Evaluation regarding coastal land is also needed to anticipate future disasters. The study of the coastal areas affected by extraordinary events, such as the Tsunami, was carried out by stakeholders in evaluating coastal land to be more responsive to disasters. This information can be used as a basis for consideration in planning, managing, and structuring coastal areas in Pandeglang District. Study uses the spatial analysis approach of Sentinel 2.0 satellite images by comparing the area before and after the occurrence of the Unsupervised classification. Another approach was used by looking at the Elevation Model Data (SRTM DEM), the implementation was carried out in 3 sub-districts in Pandeglang, which are Labuan Sub-district, Sumur Sub-district, and Panimbang Sub-district. The results showed that the open land area in Labuan Sub-district was 189,298 ha, Sumur Sub-district, the addition of open land was 144,8365 ha, and Panimbang Sub-district was 5,883 ha. Varied inundation range 50-200 meters from the coastline. The elevation of the three sub-districts shows vulnerable areas with an elevation of <2.5 m to 0.5 m above sea level.

Keywords: tsunami Sunda Strait, area affected, Pandeglang, Sentinel 2.0

38

ID: MF102

ASSESSING LOMBOK’S EARTHQUAKES IMPACTS ON CORAL REEFS ECOSYSTEM AT NUSA PENIDA, BALI

Camellia Kusuma Tito*, Eghbert Elvan Ampou, Fikrul Islamy Insitute for Marine Research and Observation, Ministry of Marine Affairs and Fisheries

*Corresponding author: camellia.tito@gmail.com; elvan.ampou@gmail.com

Abstract

Coral reefs facing multiple threats from pollution, diseases, elevated water temperatures, overfishing and a rare but catastrophic impact: natural disasters such as an earthquake. At July 28th 2018, earthquake with M6.4 and M5.4, EMSC occurred on Lombok Island which is part of the Flores fault zone of eastern Indonesia. A second, stronger event (M6.9, EMSC) occurred on August 5th, 2018, possibly on an adjacent segment of the fault zone towards the west (followed by a large aftershock occurred on August 9th, 2018 M5.9, EMSC). The objective of this work is to assess Lombok’s earthquakes impacts on coral reefs ecosystem at Nusa Penida, Bali. In this work, monitoring of coral reef ecosystem were performed by transect photographs on May and October 2018. Our findings indicate that there was evidence of coral reefs degradation in the site, particularly on the northern and southern reefs area. We also found that algal cover much higher than our previous monitoring activities, linked to higher coral mortality at these locations.

Keywords: earthquakes, coral reef, Nusa Penida

39

ID: MF106

IMPACTS OF LILI TROPICAL CYCLONE ON WAVES AND WEATHER SYSTEM OVER INDONESIAN MARITIME CONTINENT

Reynold Mahubessy*, Muhammad Iqbal, Gandhi Mahendra, Aries Kristianto

School of Meteorology Climatology and Geophysics *Corresponding author: reynoldmahubessy@gmail.com

Abstract

Indonesian maritime continent is a very unique island region at the center of circulation of the atmosphere and ocean circulation globally. On May 9, 2019 to form a tropical cyclone in the region of the Timor Sea that cause extreme weather such as strong winds, heavy rain and high waves in various parts of Indonesia, especially in eastern Indonesia. This study aims to determine the oceanography and weather condition on before, during, and after the occurrence of Lili tropical cyclones. The data used in this research is a reanalysis data of wind speed and direction, wave data, and moisture transport data. The results showed that when Tropical Cyclone Lili entered the stage of depression, wind speeds reached 20 knots and wave heights reached 1.25 - 1.5 meters in the western part of the Timor Sea. Then, when the tropical cyclone enters the peak phase there is an increase in wave height with a height of 2.50-4.0 meters in the southern Banda Sea, the waters of Sermata-Leti Islands, Babar-Tanimbar Island, and Timor Sea.

Keywords: tropical cyclone, winds, high waves

40

ID: MT113

IDENTIFICATION OF SHORELINE CHANGES IN BADUNG REGENCY, BALI, INDONESIA USING SENTINEL 2A SATELLITE DATA

T Osawa, N Pujianiki, IGRM Temaja, NG Antara

1Udayana University (UNUD), Indonesia 2Center for Research and Application of Satellite Remote Sensing (YUCARS) Yamaguchi

University, Japan *Corresponding author: sagungchandra17@gmail.com

Abstract

In this study the changes of coastline in the area were analyzed during 2015-2019 using Sentinel 2A data provided by European Space Agency (ESA). The satellite data were processed using Sentinel Application Platform (SNAP). The preprocessing stage conducted the resampling, masking and subset the areas and the digitizing the coastal area, the digitizing accuracy analysis were employed the Support Vector Machine (SVM) method on the processing stage and finally the correction of the shoreline changes was calculated on the post processing stage. The four bands (8(NIR), 8A (Narrow NIR), 11 (SWIR) and 12 (SWIR)), Sentinel 2A were used for detecting of the coastal areas. As a result, the analysis of the shoreline changes which were observed 1.42 m/year relatively due to erosion and river discharge in these areas

Keywords: shoreline change, Sentinel 2A, Support Vector Machine (SVM)

41

ID: MF117

STUDY ON SHORELINE CHANGES IN SANGSIT REGION, BALI PROVINCE

Nyoman Natih*, Riza Pasaribu, Siddiq Sangadji, Emylia Kusumaningrum Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University, Bogor, Indonesia *Corresponding author: natih@apps.ipb.ac.id

Abstract This study was conducted to observe the dynamic of shoreline changes in Sangsit Region, Bali Province using multi-temporal remote sensing and oceanographic datasets. The remote sensing data were acquired from several Landsat images in the period of 2000-2019 (20 years) with 30-meter spatial resolution. Digital Shoreline Analysis System (DSAS) method was used to analyze data images to determine the shoreline changes. Prior to the analysis, the images were corrected by ground check data combined with current, tidal, wave, and wind datasets. It revealed that the maximum and minimum abrasion values for 20 years along the shoreline are 8.35 m and 0.15 m, respectively. In this region, accretion also occurs, the maximum value is 23.38 m and minimum is 0.01 m. The area affected within 20 years is the abrasion at 1,476.84 m2 and accretion 17,523 m2. Shoreline changes that occurred in Sangsit Region, Bali Province are more likely accretion rather than abrasion over the period of 20 years. Keywords: shoreline, abrasion, accretion

42

ID: MF121

LANDUSE CHANGE AND SHORELINE DYNAMIC AFTER 13 YEARS OF TSUNAMI IN PANGANDARAN, INDONESIA

Niken Gusmawati1*, Dwiyoga Nugroho2

1Pangandaran Integrated Marine Research Institute, Ministry of Marine Affairs and Fisheries 46396 Pangandaran, Indonesia

2Marine Research Center, Ministry of Marine Affairs and Fisheries 14430 Jakarta, Indonesia *Corresponding author: niken.gusmawati@kkp.go.id

Abstract

The Indian Ocean Tsunami following earthquake event of 7.7 magnitude on the 17 July 2006 has caused severe damage to the coastal area in Pangandaran, Indonesia. The impact of earthquake and tsunami can be tracing back using remote sensing and GIS approach. 13 years after the events, the landuse and shoreline dynamic are assessed to demonstrate the development of coastal area. Multi-temporal Landsat datasets (MSS, TM, and ETM+) and site observation were applied. The imageries have been classified using Maximum Likelihood Classification (MLC) algorithm and have been validated through the process of accuracy assessment. Visual interpretation of RGB composite and NDWI (Normalized Difference Water Index) are necessary to identify shoreline. Quantification of coastline change was assessed using Digital Shoreline Analysis System (DSAS) in ArcGIS environment. The analysis of landuse change showed an increase of urban infrastructure, and shoreline dynamic in Pangandaran revealed shoreline erosions. Based on the result, the regency government needs to take mitigation measures in the framework of Integrated Coastal Zone Management and Natural Disaster Management to build Pangandaran coastal area as a renowned ecotourism destination, wildlife sanctuary, and marine science park. Keywords: Pangandaran, shoreline, landuse, erosion, remote sensing

43

ID: MF120

DEVELOPMENT OF OCEAN THERMAL ENERGY CONVERSION IN LEMBATA FLORES SEA

Mutiara1, Agus S. Atmadipoera1*, Undang Hernawan2 1Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University 2Center for Geological Survey, ESDM Bandung

*Corresponding author: atmadipoera_itk@ipb.ac.id

Abstract

Ocean Thermal Energy Conversion (OTEC) is heat energy conversion that works through the process of converting seawater heat energy into electrical energy by utilizing temperature differences between the ocean’s surface water and deep water with minimum temperature 20 oC. This study aims to estimate the Carnot efficiency of seawater temperature difference between sea surface and 1000 m of the depth, and to describe the met-ocean conditions around OTEC potential location in Lembata Island-Flores Sea region. The CTD data were acquired from OTEC cruise in September 2017, and met-ocean data (wind/waves, tropical cyclones, dissolved oxygen, and chlorophyll-a) were obtained from Marine Copernicus France, ECMWF UK, and Bureau of Meteorology Australia. The results show that the average difference in temperature produced is 23.92 oC from CTD casts temperature difference between is above 20 oC with Carnot efficiency value is about 0.834788 so net power become 83.4788 KW. This indicates study area is highly potential for development of OTEC. However, met-ocean conditions show that the study area is influenced by strong monsoonal winds that generate rough surface waves. In addition, generating strong tropical cyclones in southern region (Timor Sea and eastern Indian Ocean) occur frequently which may disrupt OTEC installation and facilities. Keywords: OTEC, seawater temperature, Carnot efficiency, CTD measurement, met-ocean condition, Flores Sea

44

ID: MS141

THERMAL DISPERSION MODEL OF COOLING WATER DISCHARGES FROM INDUSTRIAL ACTIVITIES OF STEAM POWER PLANTS (PLTU) ON THE NORTH COAST OF PAITON, EAST JAVA

M Yudha Fikri, Agus S Atmadipoera, I Wayan Nurjaya*

Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

*Corresponding author: i.wayan.nurjaya@apps.ipb.ac.id

Abstract

Necessity electricity in the society especially in industrial activities every year there is an increase in demand. The technology who used in production electricity is one of the Steam Power Plant (PLTU), where Paiton Power Plant is one of the largest power plant in Indonesia with 9 units of generation and has a capacity of 4972 MW and can distribute electricity to Java and Bali. The existence of steam power plants in Paiton waters allegedly affect the characteristics of these waters. The purpose of this research is to know the process of hot water waste distribution from PLTU Paiton either horizontally or vertically with observation method and numerical model. Tidal model validation with observation data has a high correlation value (r = +0.908). Validation model of hot water waste distribution on surface with observation result has RMSE value equal to (e = 0.96). The observation results show the temperature of the hot water waste in front of the outlet is recorded between 30 ° C to 40 ° C. Vertically, the coating of hot water waste near the outlet reaches a depth of 5 m and horizontally the thickness becomes thinner at a distance of about 500 m from the outlet mouth. The model results show that the distribution of heat waste distribution occurs more broadly when the low tide. Keywords: Paiton Power Plant, waste of hot water, CTD measurement, hydrodynamic model

45

ID: MS123

RAINFALL ANALYSIS IN THE INDIAN OCEAN BY USING 6-STATES MARKOV CHAIN MODEL

Miftahuddin*, Maulidawani Syiah Kuala University, Banda Aceh

*Corresponding author: miftah@unsyiah.ac.id

Abstract

The Markov chain is a method that studies the properties of a variable in the future based on the nature of the past to interpreting the nature of the variables that are same in the future. The popular method used in predicting future events is the discrete Markov chain. The purpose of this study is to investigate the rainfall phenomenon, especially regarding application of the Markov chain model with 6-states space at discrete time for rainfall in the Indian Ocean. Application the 6-states of Markov chain model show that dynamic probability of transition state for rainfall data. By using the Markov chain model, it is concluded that the transition rate matrix of the largest transition probability in the area of 4N90E occurs at the transition from state-1 to state-1 as much is 0.72 and state-1 to state-2 is 0.60. The use of the 1st order Markov chain is better than 2nd order at 4N90E. Keywords: 6-states Markov chain, transition rate matrix, order Markov chain

46

ID: MF125

SUSTAINABLE TOURISM DEVELOPMENT IN KEPULAUAN SERIBU

Mira*, Umi Muawanah Balai Besar Riset Sosial Ekonomi Kelautan dan Perikanan

*Corresponding author: miraclenia@yahoo.com

Abstract

The goal of this study is to analyze Sustainable Tourism Development in the Kepulauan Seribu. The methodology employed the usage of three indicators for sustainable tourism proposed by Twining-Ward (2002) and Swarbrooke (2000). They are development strategies, visitor behavior, and general concepts. We found that the tourism management model in each island depends on the island management and owner of the island. The results show that tourism development carried out by private owner has lack the principles of sustainability. Tourism development is oriented to non-local parties. On the Contrary, the island that is managed by the community and the government implements the principles of sustainable tourism development. The owner of hotels and home stays use local labor. Considering visitor behavior indicator, islands managed by private companies, only apply one out of 6 sustainable indicators, namely trip preparation. For the other 4 sustainable tourism development indicators to the private island, since they do not learn the local language, these tourists have no desire to visit again. Thirdly, considering development strategies indicators, the island is managed by the community and government implements the principles of sustainable tourism development, because it implements the most determined sustainable tourism indicators using local developers, local labor, and local architecture. The islands are managed by private sector only implement a number of sustainable indicators, namely using local architecture and planning prior to the development. Keywords: Sustainable tourism indicators, strategies of development, visitors behavior,and general concept, Kepulauan Seribu.

47

ID: MF103

ANALYSIS OF SQUID FISHERIES BIOECONOMIC MODELS (LOLIGO SPP, LAMARCK 1798) IN PELABUHAN PERIKANAN NUSANTARA KEJAWANAN (PPNK) CIREBON CITY, WEST JAVA

Muhamad Nur Purnama*, Dewi Susiloningtyas, Abinawanto

Master Program in Marine Sciences, Faculty of Mathematics and Natural Sciences University of Indonesia, Jl. Margonda Raya, Pondok Cina, Kota Depok, Jawa Barat 16424

*Corresponding author: mnurpurnama@gmail.com

Abstract

Based on the 2016 statistics on Pelabuhan Perikanan Nusantara Kejawanan (PPNK), almost half or 47% of the volume of production per species of landed in PPNK is squid (Loligo spp). This is due to the large number of fishermen who use bouke ami (squid nets) as well as the demand for supply of squid (Loligo spp) from inside and outside the PPNK, so that in this case it has driven economic growth in the fisheries sub-sector. In Indonesia the squid resources have not been managed optimally, even in some areas that have considerable squid potential as only a side catch. The use and marketing of squid (Loligo spp) landed at PPN Kejawan is expected to run efficiently so that the products quickly reach the consumers with good quality and affordable prices and can be managed sustainably. The problems mentioned above need to be studied, both in terms of biology and economics, namely Gordon-Schaefer's bioeconomic approach to determine the value of MSY, MEY, and OAE by including economic aspects (capital, costs, depreciation, income and profits) and the RAPFISH approach by considering biological constraints in managing fisheries resources. With this approach, management efforts can be taken to maintain the squid's resource potential and marketing flow.

Keywords: bioeconomics, identification of biological and economic aspects, management of squid fisheries resources (Loligo spp.)

48

ID: MF108

SPECIES COMPOSITION, STOCK DENSITY OF DEMERSAL FISH AND SHRIMP IN TIWORO STRAIT, SOUTHEAST SULAWESI

Nurulludi1*, Titin Siswantining1, Duranta Kembaren2, Tri Enawati2

1University of Indonesia 2Balai Riset Perikanan Laut

*Corresponding author: nurulludin.kkp@gmail.com

Abstract

The research was conducted by trawling vessels in the Tiworo Strait, in December 2015. The vessels used were 10 GT based on the Fish Landing Base, Bombana. The study was basically conducted by applying swept area method with stratified random sampling. The result showed that average demersal fish catch rate was 46,171 kg/hour with average stock density 3.6 ton/km2, while shrimp 1,537 kg/hour with stock density 0.18 ton/km2. The highest demersal fish stock density of 4,588.55 kg/km2 is found at the depth of 30-40 m and the lowest 2925 kg/km2 in the depth of 20-30 m. Shrimp commodities obtained highest shrimp stock density at depth 10-20 m (380.91 kg/km2) and lowest 1.85 kg/km2 at 30-40 m depth. Composition of 10 (ten) big catches dominated by Family is Leiognathidae 17.78%, Nemipteridae 8.66%, Serranidae 6.87%, Myxinidae 6.33%, Trichiuridae 5.66%, Psettodidae 5,21 %, Tetraodontidae 4.54%, Scianidae 4.13% and Apogonidae 3.77%. Shrimp resources are dominated by Trachipenaeus asver species 35.59%, Metapenaeus ensis 22.73%, Penaeus semisulcatus 13.43%, Penaeus longistilus 12.47%, Penaeus merguensis 4.27%, Penaeus monodon 1.71%, and Penaeus indicus 0.07%.

Keywords: demersal fish, shrimp, catch rate, stock density, Tiworo Strait

49

ID: MF116

OBSERVATION OF FISH AROUND SEAGRASS ECOSYSTEM USING A STATIONARY UNDERWATER VISUAL SYSTEM

Dedek Rahmad D Rizki, Adriani Sunuddin, Muhammad Iqbal, Indra Jaya*

Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

*Corresponding author: indrajaya@apps.ipb.ac.id

Abstract

Seagrass ecosystems is one of the important tropical marine ecosystems that need to be protected and preserved since it is a place for feeding, spawning and nursery ground for various species. In this paper we present a preliminary result of the use of a stationary underwater visual system as a tool to observe the presence of fishes in the study area, in Pantai Beralas Pasir, Bintan, Indonesia. The observation was conducted during day time in three stations of different seagrass species, namely Enhalus acroides, Cymodecea serrulate, and Syringodium isoetifolium. The observation data are in the form of video image that display the absence/appearance of fish inside of the observation field. It was observed that in the first station where Enhalus acroides that formed seagrass ecosystem the highest occurrence of fish found was fish from Pomacentridae family. In the second station where Cymodecea serrulate formed the seagrass ecosystem, the highest occurrence of fish observed was from Belonidae family. Lastly, in the third station, where Syringodium isoetifolium formed the seagrass, the highest appearance of fish from the family of Pomacentridae was observed. Therefore, from this preliminary observation and analysis, different species that formed the seagrass ecosystem invited different species associated with that particular ecosystem. However, more detail and in-depth analysis still need to be carried out to confirm the findings. Keywords: seagrass, underwater observation, visual recording system

50

ID: MF124

VULNERABILITY OF FISH RESOURCES IN THE MAHAKAM ESTUARY

Aisyah Center for Fisheries Research, MMAF

Corresponding author: setiyatriharyuni@yahoo.co.id

Abstract

River estuary in coastal areas, it is highly affected by inland water conditions such as freshwater and sediment flows, and ocean water such as tides, waves, and the substitution of saltwater to land. Large ecological and economic potential causes logical consequences for ecosystem changes. Including the condition of fish resources that have habitat and life cycles that are directly related to conditions that occur upstream. The purpose of this study was to examine ecological stresses and fishing activity that occur in three selected fish resources that represent estuary habitats, namely mangrove crabs, cat fish and giant prawns. The study was conducted in the Mahakam estuary, during the period January to December 2017 through field surveys. The main analysis in this study is the calculation of vulnerability values with concepts and approaches to vulnerability of catfish populations, giant prawns and mangrove crabs, based on two functions of vulnerability, namely exposure and sensitivity. The vulnerability analysis of three types of fisheries commodities refers to the method used by NOAA with some modifications to the assessment component. It is known that catfish are in a low level of vulnerability, giant prawns are at a high level of vulnerability, mangrove crabs are in a very high level of vulnerability or very vulnerable. Integrated management is required of the Mahakam watershed which covers upstream to downstream (estuary), due to systemic damage to the ecosystem along the watershed. Regarding fisheries activity, awareness of the community regarding the importance of sustainable resources is needed. Keywords: vulnerability, estuary, Mahakam, giant prawn, catfish, mangrove crab, ecological pressure, fisheries

51

ID: MF114

VIBRATE-STUNT-LARE

Totok Hestirianoto1*, Mulyono S Baskoro2 1Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University, Bogor, Indonesia 2Department of Fisheries Resources Utilization, Faculty of Fisheries and Marine Sciences, IPB

University, Bogor, Indonesia *Corresponding author: totokhestirianoto@ipb.ac.id

Abstract

Lures have been used by fisher to replace the life-bait. The application of vibrator to lure has reduced the soaking time from 21-22 minutes to 9-10 minutes (Falah, 2019). After a fish is hooked, the problem arises from the time consumed to pull the fish out of the water. Installing a high voltage circuit inside the lure, has reduced the pulling time to less than halve of the normal time. The stunt actives when the lure is pulled (hooked) by the fish. A total of less than 10 minutes is consumed by vibrate-stunt-Lure to catch a fish from chafe to land the catch. By reducing the fishing time, the quality and freshness of the fish also increases.

Keywords: vibrate, stunt, lure

52

ICMS 2019

INTERNATIONAL CONFERENCE ON MARINE SCIENCE “Towards Sustainable Marine Resources and Environment”

Topic 2: Marine Science

53

ID: MS151

THE EFFECT OF MIKROALGAL DIET ON GROWTH AND HISTOLOGICAL STRUCTURE OF WADER PARI (Rasbora lateristriata Bleeker, 1854) INTESTINE

Yessi Ayu Putri Manganang, Ariel Hanaya, Bambang Retnoaji*

Animal Structure and Development Laboratory, Faculty of Biology, Gadjah Mada University, Jl. Teknika Selatan, Sekip Utara, Bulaksumur, Yogyakarta 55281, Indonesia

*Corresponding author: bambang.retnoaji@ugm.ac.id

Abstract One among several factors for fish aquaculture is the availability of sufficient good quality of food. The nutrients should be sufficient for the needs of fish, in order to increase fish production. Microalgae is one of alternative sources of protein for fish food, and one among those is Chorella sp. Protein content of Chlorella sp. is very high, around 51- 58 % and consists of various kinds of essential fatty acids as a source of nutrition for fish larvae. Nutritional content and frequency of feeding are suspected as factors, which influence the development of fish digestive system. Therefore, the aim of the study is to examine the performance of fish food made of algae on growth and histological structure of wader pari (R. lateristriata) intestine. This research is conducted using R. lateristriata which divided into 5 groups as follow: is control negative (feed with no additional protein), feed with 17.445% algal protein, feed with 26.42% algal protein, feed with 13.595% algal protein, and positive control (feed with commercial fish food Takari, 30% protein). The parameters of the research are morphometric, weight, water quality and histological structure of intestine. The data is analyzed using anova and DMRT, and histological structure of intestine is analyzed by descriptive analysis. The results showed that treatment of feed with a different composition to give effect to the growth of fish and description of histological structure. Treatment of feed P2 (17.445% protein) showed an outgrowth of the highest weight and length. Measurement of villi length and number of goblet cells also showed a high yield. Keywords: wader pari (Rasbora lateristriata), microalgae, food, intestine, histology

54

ID: MS108

STUDY OF MICROFAUNA FORAMINIFERA AS BIOINDICATOR FOR CORAL REEF CONDITION IN TAMBELAN ISLANDS, RIAU ISLANDS PROVINCE

Dynda Romika Junita1*, Aida Sartimbul1, Luli Gustiantini2

1Marine Science Department, Faculty of Fisheries and Marine Science, Brawijaya University 2Marine Geological Institute, Bandung

*Corresponding author: dyndaromika@gmail.com

Abstract Tambelan Islands is one of the coral reef habitats in Indonesia. This area is the southern part of Natuna Sea and South China Sea Throughflow (SCSTF) exit area, which influenced the dynamics of the ocean and climate in Indonesia. To determine the conditions of waters and the environmental health of coral reef, foraminifera is one of the potential bioindicator that can be used. 20 surface sediment samples were taken, quantitative analysis were made in order to obtain the condition of waters, including calculation of abundance, community structure, and analysis of biofacies (cluster and SHEBI (SHE analysis for Biofacies Identification)). Meanwhile, to determine the condition of coral reefs is using FORAM Index (FI). The results showed that there were 52 species of benthic foraminifera included in 41 genera. The most abundant genera were Amphistegina (average 28.08%) and Operculina (average 23.85%) which is type of genera that associated with coral reefs. The FI values range from 3.57-9.12 indicating that environmental conditions are conducive to coral reefs. Biofacies from the cluster and SHEBI showed different results, indicating that the abundance of foraminifera in research area are influenced by complex factors such as substrate conditions and the activities on land. Keywords: foraminifera, Tambelan Islands, SHEBI, FORAM Index

55

ID: MS110

STUDY OF BENTHIC FORAMINIFERA ON ITS CONNECTION WITH ENVIRONMENTAL CONDITION IN BIDADARI ISLAND, KEPULAUAN SERIBU

Vina Zubaida1*, Aida Sartimbul1, Suhartati M Natsir2

1Marine Science Department, Faculty of Fisheries and Marine Science, Brawijaya University

2Research Centre of Oceanography LIPI, Jakarta *Corresponding author: vinazubaida18@gmail.com

Abstract Bidadari Island is one of the tourism area, located in the southern part of Kepulauan Seribu. Tourism activities and it location that directly facing Jakarta Bay, obviously will affect the quality of the waters and ecosystems in Bidadari Island, considering that Jakarta Bay is a place that downstream 13 rivers in Jakarta. A study of benthic foraminifera was carried out in 10 surface sediment and water quality samples, collected from the Bidadari Island, in order to determine the connection between abundance of foraminifera with the environmental conditions. Quantitative analysis, including calculation of abundance, community structure, and cluster analysis conducted to obtain this information. The results showed that there were 2473 individual benthic foraminifera with a total of 33 species from 23 genera. The most abundant genera were Amphistegina, Calcarina, and Operculina. Based on the calculation of the community structure (diversity, evenness, and dominance Index), benthic foraminifera on Bidadari island are in the low to moderate category, indicating that in this area the environmental condition has begun to declined. This declined condition is supported by the pH value and brightness below the threshold/quality standard. Keywords: foraminifera, Bidadari Islands, Kepulauan Seribu

56

ID: MS114

ANTI MICOBACTERIUM COMPOUND DERIVED FROM Erythrobacter sp. ISOLATED FROM Callyspongia aurizusa

Tutik Murniasih1*, Ceicilia Cindhy2, Endang Sukara2

1Reseach Center for Oceanography-Indonesian Institute of Sciences, Indonesia

2Department of Biotechnology and Neuroscience, Surya University, Indonesia *Corresponding author: tutikmurniasih71@gmail.com

Abstract Pathogenic bacteria, especially Mycobacterium, to be one of the causes of disease in society. Sponge bacterial symbionts are one of the potential sources for producing new antibacterial compounds. This study was carried out for investigating the antimycobacterial compounds derived from the Callyspongia aerizusa’s bacterial symbiont. Antimycobacterial compound isolation was done by growing selected bacteria SP.PP.3 in marine broth than continued for active compound separation. The separation of active compound was carried out using HPLC, whereas the antibacterial activity was tested using agar diffusion method against Mycobacterium smegmatis. The compounds were identified by spectroscopy method (GC-MS). Antimycobacterial compound was detected in the HPLC fraction with code FH8. GC-MS analysis predicted that 2,4-Di-tert-butylphenol was contained in the extract 16S rRNA molecular identification indicated that the strain SP.PP.3 was closely related to Erythrobacter sp. with 99% homology similarity. Keywords: antimicrobial, active compound, Erythrobacter sp

57

ID: MS143

DIVERSITY AND ROLE OF MACROALGAE ON KENDARI BAY AND ITS SURROUNDING, SOUTH EAST SULAWESI

Tri Handayani

Research Center for Oceanography, Indonesian Institute of Science *Corresponding author: umuamel@gmail.com

Abstract Kendari Bay and its surroundings were one of the locations of monitoring control for Coral Reef Rehabilitation and Management Program (COREMAP). The monitoring activity includes several aspects, especially the constituent biota of the ecosystem, one of which was macroalgae. Macroalgae was the important biota of the coastal ecosystem that has a role both ecologically and economically. The aims of this study are to determine the diversity, and role of macroalgae on Kendari Bay and its surroundings. Observation of macroalgae on Kendari Bay and Surroundings was conducted on September 2016. The study was conducted in eight locations, namely Lara Island, Lalow Aru, Tanjung Tiram, Baungkutoko, Watuw Atu, Bokori Island, Tapulaga and Tenunggeu. Macroalgae samples were collected by transect quadrate method. Parameters measured were species, standing crops, life form and substrate of macroalgae. A total of 38 species (26 genera) of macroalgae have been successfully collected from Kendari Bay and its surroundings. Macroalgae was dominated by Halimeda. There were five macroalgae life form, namely epilytic, epipitic, epizoic, rhizophytic and drift. Epilytic and rhizopitic were the most common of macroalgae life forms. Macroalgae role as a habitat for other small marine organisms, namely crustaceans, mollusks and echinoderms. There were 13 species of macroalgae useful as source of food, alginate and agarose producer. Keywords: macroalgae, diversity, role, life form, Kendari Bay, South East Sulawesi

58

ID: MS112

ANALYSIS OF MANGROVE ECOSYSTEM TREATMENTS ON THE EXISTENCE OF FISH LARVAE IN SEMARANG AND DEMAK

Ambariyanto, Jusup Suprijanto

Diponegoro University Corresponding author: jusup.suprijanto@yahoo.co.id

Abstract Environmental damage due to industrial activities and lack of mangrove rehabilitation can reduce the ecological function of mangroves and disrupt the presence of aquatic fauna associated with mangrove ecosystems, so that it can affect the potential availability of fish larvae in mangrove forest ecosystems. Analysis of the density of mangrove ecosystems on the abundance of fish larvae in Semarang and Demak is carried out in August - February during the dry and rainy seasons. Mangunharjo Village and Timbulsoko Village have fertile waters because they have a good density of mangroves and have the potential to become a ground nursery area and feeding ground for fish. The results showed that the largest caught fish larvae were 47 at the TMS point in the waters of Timbulsloko Village, this was allegedly due to the high level of mangrove density and many fish larvae that were nocturnal. The composition of the types of fish larvae caught consisted of 5 families, namely Mugilidae, Gobiidae, Chanidae, Apogonidae, Scatophagidae. The most common types of fish larvae were 32 Gobiidae fish larvae in February 2019 while the least caught were Apogonidae and Scatophagidae fish larvae in September and November. The biggest salinity is 32.2 o / oo at the TMP site and the smallest is 28 o / oo at the MMS site. The highest temperature is 31.7o C at the MMP site and the lowest is 27oC at the TMS site while the highest pH is 8.46 at the TSP point and the lowest is 7.23 at the TSS site. The abundance of the largest fish larvae was 521,172 ind/125 m3 found at the TMS site, while the abundance of fish larvae at least at the TMP site with an abundance value was 83,418 ind/125 m3. The high abundance of fish larvae is due to the density of dense mangrove vegetation so that there are many food sources of fish larvae. This is supported by statistical analysis that the effect of mangrove density on the abundance of fish larvae is 62.3% while 37.7% abundance of fish larvae is influenced by other variables not examined, parameters of salinity supporting water, temperature and pH do not affect fish larvae abundance based on statistical analysis. Keywords: density, mangrove, abundance, fish larvae, Semarang, Demak

59

ID: MS128

Anguilla bicolor’s (MCCLELLAND, 1844) SWIM BLADDER AS IMPORTANT ORGAN FOR REFLECTING ACOUSTIC WAVE

Ariel Hananya1, Sri Pujiyati2, M Hasbi S2, Bambang Retnoaji1*

1Faculty of Biology, Universitas Gadjah Mada, Yogyakarta

2Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia

*Corresponding author: bambang.retnoaji@ugm.ac.id

Abstract

Anguilla bicolor (McClelland, 1844) is one of fish that have swim bladder to assist swim and doing migration. Every fish have different shape, gas volume, dimension and ratio, which can play a role in the difference in backscattering of acoustic energy. This study aims to determine the shape, dimensions and ratio of Anguilla bicolor swim bladder and their effect on target strength values. The research was conducted in two places, in the Acoustic lab, Department of Marine Science and Technology and in Laboratory of Histology and Embryology, Faculty of Biology, Universitas Gadjah Mada. Retrieving data using the EK-15, Frequency 200 KHz tool and also the X-ray photo. The results show the shape of the swimming bladder of Anguilla bicolor is elongated and consists of 1 room which is generally called a closed swim bladder. Acoustic detection results show that fish with large swim bladder volumes have large TS values and conversely fish with small swim bladder volumes have a small TS value. Keywords: Anguilla bicolor, swim bladder, resonance

60

ID: MS102

THE UTILIZATION STATUS OF MADIDIHANG FISH (Thunus albacaress) IN MOROTAI ISLAND REGENCY

Marselius Talahatu*, Dewi Susiloningtyas, Tuty Handayani, Sugeng Budiharsono

Indonesia University *Corresponding author: marsel264@yahoo.co.uk

Abstract

Morotai Island Regency is located among three national fishery management areas in Indonesia, namely WPPRI 715, WPPNRI 716, and WPPNRI 717. Geographically, the watery area of Morotai Island is located between two phenomena such as Indonesia Through Flow and Eddy Halmahera. Because of that, it can give the abundance of marine resources. The aim of this research is to know the benefit level of Madidihang fish in Morotai Island Regency by using analytical tools such as CPUE, MSY, TAC and the benefit level. The result of this analysis shows that the production of Madidihang fish is about 8,469.17 tons with the average level of production is 846.92 tons per year for ten years (2009-2018). Moreover, the total of catching tools that used in catching operation is 12,145 with the cacth per unit effort (CPUE) of 0.73764 per year. Based on the calculation of surplus of production by using Model Fox, the value of maximum sustainable yield (MSY) of Madidihang fish resources is 8,657.67 tons per year with the value of effort maximum (EMSY) of 236 unit per year. The benefit status of Madidihang fish resources is still low (< 50%) with its level of 9.78% or approximately 846.92 tons per year from maximum sustainable yield (MSY). It means that there is still idle capacity of Madidihang fish is about 7,810.76 tons per year (90.22%). Keywords: utilization status, Madidihang fish, Morotai Island

61

ID: MS139

THE POTENTIAL ROLE OF EUTROPHICATION, TIDAL AND CLIMATIC ON THE RISE OF ALGAL BLOOM PHENOMENA IN JAKARTA BAY

Tumpak Sidabutar1*, Endang S. Srimariana2, Sam Wouthuyzen1

1Research Centre for Oceanography LIPI. Jl. Pasir Putih 1. Ancol Timur Jakarta Utara. 2Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB

University, Bogor, Indonesia *Corresponding author: tumpaksid@gmail.com

Abstract Over the past several years the number of algal bloom incidents in Jakarta bay have increased. The increasing frequency of algal blooms incidents and subsequent environmental impacts in this bay are a rising threat to the coastal resources, economy and public health. Eutrophication, tidal or sea-level and climatic are three processes that may promote bloom incidents in this waters. To understand the role of these three processes, a monitoring program had been conducted since 2008 until 2015. The study reveal a significant seasonal increase in algal bloom incidents. During the study the concentration of phosphate in the waters ranged from 0.01-2.5 µg/L and nitrate ranged from 0.01-15.89 µg/L. The ratio of nutrients (N/P) in this waters ranged from f 0.2 - 45.4 where the highest ratio was noted in 2010. The rise of N:P ratio may affect changes phytoplankton abundance. The growth of phytoplankton appears to be influenced with the rise of nutrient ratio of nitrate and phosphate. When the ratio of N:P in the waters more than 16 indicating nitrate acting as triggering factor of phytoplankton growth and phosphate as limiting factor (P-limited). The growth of microalgae is closely related to eutrophication in the waters, and the nutrient enrichment may lead to a dense population. The role of nitrate and phosphate is complementary to the growth of phytoplankton where an increase in nitrate concentration must increase parallel with an increase in phosphate concentration. If the N:P ratio is low, it can affect competition between species, so there will be no dominance because all types of phytoplankton have the same opportunities to grow. Due to extreme climatic conditions the Jakarta is highly vulnerable to the effects of regional climate change. Hence apart from eutrophication, the role of climate change in phytoplankton genera and algal bloom expansion will be discussed in detail. In addition, the paper also covers prevention, control and mitigation effort Keywords: limiting nutrients, eutrophication, N/P ratio, phytoplankton, Jakarta Bay

62

ID: MS122

DETERMINATION OF CORAL REEF REHABILITATION AREAS ON PAHAT ISLAND, ANAMBAS ISLANDS

Dondy Arafat, Beginer Subhan, Novit Rikardi, Hawis Madduppa*, Prakas Santoso, Muhammad

Adip Setiawan, Mufti Aprizan, Ridho Zulfikar Wicaksono, Budi Prabowo Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB

University *Corresponding author: hawis@apps.ipb.ac.id

Abstract To investigate rehabilitation area of coral reef, used with manta tow surveys, counts obtained by manta-towed observers were compared with counts made on SCUBA with “underwater photo transect (UPT)”. The results of the Manta tow, coral cover is dominated in categories 2 and 3 (11% - 50%) in the western, northern and southern parts of Pahat Island. Distribution with more than 50% category, found in the eastern part of Pahat Island, is in category 5 (76% -100%) and category 4 (51% - 75%). The distribution of coral growth forms was carried out by the photo transect method, the results in the eastern part of live coral cover 62.5% and the western part of live coral cover 33.67% and the northern part of live coral cover 17%. Conclusions, good coral cover on the east of Pahat Island and a poor area on the western part of Pahat Island is recommended for the rehabilitation area. There are similarities in the results of coral reef cover obtained by the Manta tow and UPT methods. The stages of determining coral rehabilitation areas have their advantages. The manta tow survey can determine broad-scale and cost-effective patterns for estimating rehabilitation areas. However, ecological information, types of coral reefs and supporting dissociation biota using the UPT method are more complete. Keywords: manta taw, coral reef, Anambas, Indonesia

63

ID: MS138

ASSESSMENT OF CORAL REEFS HEALTH IN NATURE RECREATION PARK (TWA) SANGIANG ISLAND-BANTEN

Idris1,3*, Aulia Rahmania Putri1, Cakra Adiwijaya1, Muhamad Gilang1, Prakas Santoso1, Budi

Prabowo1, Fadel Muhammad1 Wiwid Andriyani L1, Dea Fauzia Lestari2, Wahyu Adi Setyaningsih2, Neviaty P. Zamani2

1Master Program of Marine Science, Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia

2Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia

3Yayasan Terumbu Karang Indonesia (TERANGI) *Corresponding author: idris@terangi.or.id

Abstract

Sangiang Island had been established as a Nature Recreation Park (TWA) in Indonesia, that requires comprehensive data support for good management. The rise of marine tourism that increased in TWA Sangiang Island behoove to be a concern, especially in coral reef ecosystem. Study on coral reef health index needed to be implemented at TWA Sangiang Island, because there was no research was conducted to support coral reef management. The study aimed to determined the condition of the coral cover and also the biomass composition of coral reef fishes, then to identify parameters that affected coral health and the coral reefs health index in TWA Sangiang Island. The observation was carried out on May 2019, which consisted of three locations. First location represented as area near to the estuary (Legon Waru), second location represented as entry point for shipping (Tembuyung), and the last represented as area for diving tourism (Legon Bajo). Each location was observed at 3 to 5 meters of water depth. The results showed that the coral cover was 24% (Bad category). The highest target fish biomass was Legon Bajo (0.013 kg/ha) and the lowest was Tembuyung (0.002 kg / ha. Coral reefs health index in Legon Waru was strongly influenced by live coral cover, and also in Legon Bajo was influenced by live coral cover, rubble and biomass of target fishes, while in Tembuyung was much influenced by fleshy seaweed cover. Keywords: coral reefs health index, Sangiang Island, coral cover, fish target biomass, fleshy seaweed.

64

ID: MS125

EFFECT OF REGIONAL OCEANOGRAPHIC PROCESSES TO THE DISTRIBUTION OF RADIONUCLIDES IN COASTAL OF KALIMANTAN

Wahyu Retno Prihatiningsih*, Murdahayu Makmur, Heny Suseno, Mohamad Nur Yahya

Center for Technology of Radiation Safety and Metrology, National Nuclear Energy Agency, Jalan Lebak Bulus Raya No. 49, Jakarta Indonesia

*Corresponding author: ayu-iu@batan.go.id

Abstract

The present status of marine radioecology condition at the coastal of Kalimantan was determined based on monitoring of the radionuclides concentration in marine compartment of West, South and East Kalimantan. Oceanographic characteristic from regional sea was contributed to the radionuclide distribution in Kalimantan as part of Indonesian Through Flow (ITF). This research is to determine the concentration of radionuclides and regional oceanographic effects on the distribution of radionuclides in the coastal of Kalimantan. Gamma radionuclides activity concentration were measured using High Purity Spectrometer Gamma Detector (HPGe) which integrated with the software analysis Genie 2000. Modelling Processes and field observation from previous study become reflection of Kalimantan regional sea characteristic. The result of research shows that the baseline data that represented from natural and anthropogenic radionuclides are comparable with other regions in Indonesia. The concentration of natural radionuclides in the sediments showed that there are no contamination of Natural Occurring Radioactive Material (NORM) and 137Cs. Keywords: marine radioecology, Kalimantan, Indonesian Through Flow (ITF), Natural Occurring Radioactive Material (NORM), 137Cs

65

ID: MS111

ABRASION HAZARD OF SENINDARA AREA, BINTUNI BAY BY NUMERICAL MODEL

Undang Hernawan1*, Fauzi Budi Prasetio2, Rahayu Kusuma Risdianto3 1Geological Survey Centre of the Ministry of Energy and Mineral Resources, Jl. Diponegoro 57

Bandung

2Marine Geological Institute, RnD Agency of ESDM 3RnD Center of Oil and Gas Technology LEMIGAS, RnD Agency of ESDM

*Corresponding author: Undang Hernawan uhernawan@gmail.com

Abstract

The Senindara River area is part of Bintuni Bay which is influenced by the dynamics of the sea waters. This area is widely used as a dock to support the activities of the community and industries that are developing in this region. Alluvium land conditions and partially thickened, make this region prone to experiencing the danger of abrasion. The research location is on the Senindara River, part of Bintuni Bay. This study aims to obtain abrasion hazard conditions that occur in the study area. The study method is done by numerical modelling. Tidal observations were carried out for 15 days with levelling rod. Current data processing is done by the Admiralty method. Current measurements were carried out for 26 hours using the Eulerian method. Modelling using momentum, temperature, and density equations. Spatial discretion of the equation is done using the cell-cantered finite volume method. Model calibration is done by comparing the output of the model (current and water level) with the results of observations. The study shows the value of the basic shear stress of the average model value is greater than the value of the basic shear stress critical model erosion 0.1 N/m2. This shows that at the observation location there is a high risk of abrasion, especially in the industrial supporting area at the study location, so that prevention of abrasion hazards is needed. Keywords: Senindara, Bintuni Bay, abrasion, numerical model

66

ID: MS127

VARIATION OF SEAWATER PROPERTIES AND BIOACOUSTICS ON TIDAL-SCALE AT THE ENTRANCE OF PADANGBAI LOMBOK STRAIT

Agus Atmadipoera1*, Nyoman Natih1, Yulianto Suteja2, Marlin Wattimena1, Vaneasa Masoleh1,

Yulina Pranoto1, Dewa Adiyathma1, Priska Widiastuti1, Sri Ratih Deswanti1, Andhita Triwahyuni2, Hana Watari3, Amandangi Wahyuning Hastuti4, Asep Mamun5, Anda Vladoiu6, Chonnaniyah2

1Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia

2Marine Science Program, Udayana University Indonesia 3Faculty of Sciences, Yamaguchi University Japan

4Institute for Marine Research and Observation, Bali Indonesia 5Institute for Marine Fisheries Research, Jakarta Indonesia

6LOCEAN, Sorbonne University Paris France *Corresponding author: atmadipoera_itk@ipb.ac.id

Abstract A continuous CTD “yoyo” and bioacoustics measurement have been carried out at the entrance of Padangbai Lombok Strait at about 60 m depth to investigate seawater properties and bioacoustics variations tidal-scale. It is found that strong variation on semi-diurnal variation of properties related to tidal dynamics. During flood tide, seawater properties and bioacoustics are derived from Lombok strait with colder saltier and high dissolved oxygen. In contrast during ebb tide, water from inner bay. However, chlorophyll-a derived fluoro is indicated diurnal variation. Keywords: CTD yoyo measurement, 24-h bioacoustics, seawater properties, Padangbai Lombok Strait, tidal-scale

67

ID: MS104

OBSERVATION AND NUMERICAL MODELS OF TEMPERATURE AND CHLOROPHYLL-A AS UPWELLING INDICATOR IN BALI STRAIT INDONESIA

Wingking Era Rintaka Siwi*, B Priyono

Institute for marine Research and Observation, Ministry Marine Affair and Fisheries *Corresponding author: era09.bpol@gmail.com

Abstract Variability of temperature and chlorophyll-a can be used upwelling indicators. Time series observation of temperature and chlorophyll-a was difficult because it required time and costly. Therefore, numerical models and observation were required as validation. This study aimed to determine the variability of temperature and chlorophyll-a observations and numerical models in Bali Strait seasonally. This study was conducted at 8.10°S - 8.90°S and 114.25 °E - 115.25 °E. Output of numerical models of temperature and chlorophyll-a by using calculation from Gaussian empirical equations. Numerical models of temperature and chlorophyll-a had been verified with the observation data in April, June and August 2013 which were measured with Conductivity Temperature Depth. The result of numerical model and observation indicated that Sea Surface Temperature in Bali Strait during the southeast monsoon was appeared lower while chlorophyll-a concentration was higher than during the northwest monsoon especially in 0-20 m depth. It strengthened previous study where the maximum concentration of chlorophyll-a was occurred during the southeast monsoon in September in 0-23 m of depth. In addition, based on the results of numerical model and observations, there was cold water mass movement from the deep to the surface layer when entering the southeast monsoon in July-September Keywords: temperature, chlorophyll-a, numerical, observation, upwelling

68

ID: MS126

SEA SURFACE TEMPERATURE TRENDS AND COASTAL UPWELLING IN BANDA SEA

Herlambang Aulia Rachman, Jonson Lumban Gaol* Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB

University *Corresponding author: jonson_lumbangaol@yahoo.com

Abstract The Banda Sea region is one of the locations in Indonesian waters that has high Coastal Upwelling intensity which related with the monsoon pattern. The calculation of Upwelling Index (UI) based on Wind data show that the peak coastal upwelling is from June to September. Analysis of SST trends was carried out in the July-September period based on NOAA OISST data from 1982-2017. The results show that there are differences in the value of SST trends that occur in the Coastal and Oceanic regions. In general, the SST trend in the Banda Sea waters has a positive value (warming) in both the coastal and ocean areas. While the UI trend in coastal and oceanic regions in the Banda Sea has a tendency to decline from the 1982-2017 period. This condition shows that oceanographic conditions in Banda Sea waters are quite influenced by external factors. It is also thought to have caused a decrease in the intensity of the upwelling trend found in the Banda Sea. Keywords: Banda Sea, coastal upwelling, sea surface temperature, wind

69

ID: MS105

UPWELLING EVENT IN THE NORTHERN ARAFURA SEA: FROM OBSERVATION AND NUMERICAL MODEL

Agits A F1, Agus S Atmadipoera1*, Rina Zuraida2

1Departement of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

2Geological Survei Center, Geological Institute Bandung Indonesia Corresponding author: agus.itk@gmail.com

Abstract

High marine primary productivity in the Arafura Sea is considered to be contributed from Ekman coastal upwelling in the region. However, mechanism of upwelling event is not clear yet. This study aims to investigate the physical processes and dynamics of Ekman upwelling, by analyze variation of sea surface signature and water column datasets in 2017 from observation and numerical model. The CTD data was measured in September 2017, and the model outputs and surface atmospheric datasets were obtained from Marine Copernicus and ECMWF, respectively. The results showed that the major forcing of upwelling dynamics in the study area is the Southeast Monsoon Winds, from May (onset) to September (termination). During that period, the atmosphere-ocean condition is characterized with minimum of air temperature (23.52 °C), sea surface temperature (24.19 °C), sea surface height (19.30 cm). In contrast, surface chlorophyll-a show a maximum (12.85 mg m-3). Furthermore, the maximum Ekman transport due to upwelling reaches 0.71 Sv (1 Sv = 106 m3 s-1) toward offshore. In particular, in the CTD measurement area (Northern Arafura), the transport volume is about 0.39 Sv. It is seen clearly that the upwelling event is indicated with shallowing isotherm contours between 24.50 and 25.50 °C, as well as the isohaline contours between 33.75 and 34.25 psu, and isopycnal contours between 22.50 and 23 kg m-3 from 30 - 40 m depth to the sea surface. Keywords: CTD measurement, Ekman upwelling, Northern Arafura Sea, Southeast monsoon winds

70

ID: MS146

UPWELLING INDEX ALONG THE SOUTH COAST OF JAVA FROM SATELLITE IMAGERY OF WIND STRESS AND SEA SURFACE TEMPERATURE

Yuli Naulita*, Risti Endriani Arhatin dan Nabil

Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia

*Corresponding author: naulita@apps.ipb.ac.id

Abstract

Upwelling along the south coast of Java occurs in southeast monsoon and its peak is in September. For the purpose of synoptic scale study of upwelling, it has been developed the estimation method of upwelling indexes through the common Ekman-based upwelling index and Sea Surface Temperature (SST)-based upwelling index. Upwelling index using wind stress data along the south coast of Java in September mostly shows the negative values. The upwelling intensity difference of three upwelling centers, along the south coast of West Java, Middle Java and East Java, was examined through the SST minimum and gradient of SST to offshore. Calculation of SST-based upwelling index shows a relatively intense and persistent upwelling of East Java in September 2014 and 2015. The value of SST minimum of upwelling center of East Java is the lowest and the gradient SST to 75 km off shore reveal the maximum values. Indication of the strength of upwelling intensity can be seen through the SST-based upwelling index, that can be used as supporting Ekman-based upwelling index. Keywords: upwelling index, Ekman transport, Sea Surface Temperature, south coast of Java

71

ID: MS147

GEOSTROPHIC CURRENTS IN NORTHERN LEMBATA WATERS: FROM OBSERVATION (OTEC CRUISE) IN SEPTEMBER–OCTOBER 2017

N M N Natih1, M I F Nipsan1, Y Permanawati2, U Hermawan2

1Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia

2Marine Geological Institute (P3GL), Bandung 40174, Indonesia *Corresponding author: natih1406@yahoo.com, muhammad_iqbal@apps.ipb.ac.id

Abstract Northern Lembata Waters (NLW) is located between the Flores and Banda Sea that its dynamics may affected by Monsoon Currents and Indonesian Throughflow (ITF). This study aims to describe the physical characteristics of the waters and geostrophic currents using observation data. From its characteristics such as temperature, salinity, and density it can be deduced that the waters vertically stratified. It showed there is water mass movement due to density differences. The upper layer (0–300 dbar) velocity is ranged from 12.59–343.93 cm s-1 flows eastward and bottom layer (300-600 dbar) velocity, in section B, is ranged from 7.66–49.19 cm s-1 flows westward. The current movement to eastward indicate it has ITF, and movement to westward indicate water mass enter NLW from Banda Sea. Keywords: geostrophic current, north Lembata waters

72

ID: MS115

EDDY-INDUCED MIXING IN THE MESOSCALE OCEAN

Albert Sulaiman Pusat Teknologi Pengembangan Sumberdaya Wilayah, Badan Pengkajian dan Penerapan

Teknologi (BPPT) Corresponding author: albertus.sulaiman@bppt.go.id

Abstract The eddy-induced mixing in the ocean and the nature of its controlling processes is still unsolved problem. The mesosacele phenomena related this issues observed in the ocean for example, anticyclonic eddy propagating due to diapycnal mixing, the mechanism of the mixing of tracers along mean isopycnals into the interior ocean, and the dissipation of the potential energy released by baroclinic instability. In this paper, the mesoscale oceanic momentum equation and a new second-order turbulence closure scheme will be used to derive the eddy-induced mixing in the shallow water ocean. The equation of motion of eddy-induced mixing especially for vertical eddy diffusivity is obtained in the term of stream function. In the linear case, by using the analysis into normal modes which are sought in a certain boundary condition show a parameter that similar to Rayleigh number. We also show that an increase of eddy velocity followed by increasing mixing efficiency. A nonlinear analysis based on phase space dynamics will be highlighted. Keywords: eddy ocean, meso scale, mixing, shallow water

73

ID: MS120

VELOCITY AND PATTERN OF WATER FLOW WITHIN THE LAGOON OF SEMAK DAUN IN SERIBU ARCHIPELAGO, INDONESIA

Saenuddin1, Wayan Nurjaya1, Dietrich G. Bengen1, Tri Prartono1, Irzal Effendi2

1Departement of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

2Department of Aquaculture, Faculty of Fisheries and Marine Science, IPB University *Corresponding author: saenuddin80@gmail.com

Abstract Semak Daun lagoon is a separate lagoon with land in the Seribu Islands region, on the west side of the Java Sea. The area of the lagoon is ± 315.2 Ha2. Flat reefs function as lagoon barrier embankments, in tidal conditions inundated by seawater, on the contrary surfaces at low tide. At low tide conditions, it is connected to the surrounding waters through the six main channels. This study purpose to examine the velocity and pattern of water flow in Semak Daun lagoon. The 3D model is built based on two generations of motion namely wind and tidal pressure. In addition, it also considers other forces acting on sea water masses. Discretization of equations uses the volume method to cantered-cells. In vertical discretization, the domain uses sigma coordinates, where the domain is divided into 14 layers while horizontally divided into 14,575 triangular elements with a box area of 1,000 m2. The results of the verification model with observational data in the field show that the similar tidal pattern and current velocity are very good as indicated by the MAPE value of 0.32 %, which means that the model is very well constructed. The flow pattern generally moves from West to East at sea level position from flood to ebb, on the contrary from East to West at sea level position from ebb to flood with different flow velocities and directions. In ebb conditions, sea level in the lagoon higher than outside at lagoon, this is different from the three sea level conditions (ebb to flood, flood, and flood to ebb conditions). In ebb, ebb to flood and flood to ebb conditions, inflow waters from the North channel and outflow waters through Southwest and South channels while in flood conditions, inflow waters from the East and North channels. The velocity and pattern of water flow in the lagoon are dominantly influenced by tidal dynamics. The residual currents in the cultivation location are found in the range of 0.01-0.04 m/s with a random pattern. Keywords: Semak Daun lagoon, 3D, wind, tide, current

74

ID: MF115

SEASONALLY VOLUME, HEAT, SALT, AND FRESHWATER TRANSPORTS WITHIN BALIKPAPAN BAY TO MAKASSAR STRAIT

Anom Sulardi

Department of Ocean Science, Tokyo University of Marine Science and Technology, Tokyo, Japan

Corresponding author: anomsulardi@gmail.com

Abstract

Study about water mass transport within Balikpapan Bay (BB) is crucial since many watersheds discharge from this bay which directly flows into Makassar Strait. To understand the transport of water mass within BB, INDESO data were made monthly in 2015. The annual volume, heat, salt, and freshwater transport are estimated to be 18.02 mSv, 2.14 PW, 0.64 x 109 kgs-1, and 1.05 mSv, respectively. Compared to the annual mean volume transport of Makassar Strait (6.4 Sv), the annual transport of water mass from BB is likely to contribute less amount of volume and heat transport with the weighted-transport temperature at 30.37 °C. They are somewhat smaller than the difference between each season. The difference may be attributed by the external force, i.e. current circulation and tidal wave, as well as the precipitation along BB.

Keywords: Balikpapan Bay, freshwater, volume transport

75

ID: MS131

HYDROGRAPHIC MEASUREMENT IN SOUTHERN SULAWESI SEA: FROM KRI SPICA CRUISE 2016

Agus Atmadipoera1*, Gentio Harsono2, Dikdik2, Nadia2 1Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB

University, Bogor, Indonesia

2Center for Hydrography and Oceanography Survey *Corresponding author: atmadipoera_itk@ipb.ac.id

Abstract Sulawesi Sea is the second deepest basin (after Banda Weber basin) with the deepest depth is about 5500 m. The basin is constrained to Sangir-Talaud Arc in eastern boundary, Kalimantan to the west and Sulu islands to the north. The basin provides first entry portal of Indonesian Throughflow (ITF) from Mindanao Jet then exit to Makassar Strait escorting North Pacific water origin. The objective of this study is to investigate stratification of ITF water masses and its associated circulation. The CTD and SADCP data are obtained from KRI SPICA cruise in June 2016. The results show that the structure of ITF water masses in the study area is dominated by salty thermocline (>34.9 psu) of North Pacific Subtropical Water (NPSW) cantered at 125 m depth and salinity minimum (<34.4 psu) of North Pacific Intermediate Water (NPIW) at about 250-350 m depth. Spatial variation of these two water masses is found between CTD location in the central and southern basin. Along-track current vector revealed that mean flow of current is north eastward, which may represent a recirculation of Sulawesi ITF. It is also evidence of strong current at thermocline depth. Keywords: Sulawesi Sea, Indonesian Throughflow water, CTD measurement, KRI SPICA

76

ID: MS132

OCEANOGRAPHIC CHARACTERISTICS IN THE SUNDA SHELF REGION (NATUNA AND JAVA SEAS)

Agus S. Atmadipoera1*, Apriansyah2, Ishak Jumarang2, Risko2

1 Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia

2Department of Physics, Tanjungpura University Pontianak Indonesia *Corresponding author: atmadipoera_itk@ipb.ac.id

Abstract The Sunda Shelf region covers Natuna Sea and Java Sea where shallow bathymetry is mostly less than 100 m depth. The region is also divided geographically by Equatorial line implying different characteristics of trans-equatorial circulation. This study aims to investigate oceanographic characteristics including surface circulation, spatial and temporal variation of circulation, and transport volume estimate and its variability. The results show that the mean circulation is indicated by strong kinetic energy with southeast flow along eastern Malaysia Peninsula, extending to Karimata Strait and partly leakage via Sunda Strait into Indian Ocean. Cyclonic eddies are developed in northern Borneo and northeast flow along northwestern Borneo, and a high kinetic energy of current band and eastward flow along mid Java Sea. Analysis of EOF revealed that spatial pattern of meridional current components may represent main axis of reversal monsoonal current with a dominant annual period. Estimates of mean transport volume in northern Natuna Sea, Karimata Strait and eastern Java Sea varies between 0.495-1.22 Sv. However, mean transport during Northwest Monsoon is in the order of 3 Sv that contribute significantly to the Indonesian Throughflow from Makassar Strait. Keywords: surface circulation, Natuna and Java Seas, INDESO model output, transport volume, time-series analysis

77

ID: MS135

EVIDENCE OF NORTH INDIAN OCEAN INTERMEDIATE WATER ALONG THE NORTHERN SAVU SEA FROM INDOMIX 2010 CRUISE

Agus S. Atmadipoera1*, Ariane Koch-Larrouy2, Yannis Cuypers3, Indra Jaya1

1Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia

2LEGOS, Université Paul Sabatier Toulouse III, Toulouse, France 3LOCEAN, Sorbonne University, Paris France

Corresponding author: atmadipoera_itk@ipb.ac.id

Abstract

Recent temperature-salinity and current profiles data sets, sampled along southern small Sunda Islands chain, have been carried out from the R.V. Marion Dufresne during the INDOMIX cruise in July 2010 to study the existence of North Indian Intermediate Water (NIIW water mass) and eastward boundary current, known as South Java Under Current, in the northern Savu Sea. These snapshot observational data sets are complemented with validated ocean general circulation model outputs of ORCA025 to investigate trajectories of NIIW water mass and its seasonal variation. The new result is that NIIW water mass is surprisingly predominant along the northern Savu Sea, contrary to previous studies suggesting this water mass recirculates southward just after Sumba Strait. Here, NIIW water mass is characterized by salinity maximum (S >34.60 psu) with its core layer centered at ~400m depth, its temperature between 6-8 °C, and inhabits at density surface between 26.8-27.2. NIIW water mass is advected by north-eastward boundary current, as observed from along-track current data. However, observed strong westward - southwestward flow from Ombai ITF Jet during survey time prevents an extension of NIIW farther to the east, resulting disappearance of NIIW in the last two sampling stations much closer to Ombai Strait. Further analysis of model particles trajectories during survey time shows that, near Ombai Strait, the pathways of eastward boundary current turned southwestward, deflected by Ombai ITF Jet. The model also demonstrates that eastward boundary current along northern Savu Sea is persistent with large semiannual fluctuation, consistence to the past observation of mooring current-meter data in Ombai North. Keywords: Indomix Cruise, XCTD measurement, Model output, southern Small Sunda Arcs, Indian water masses, Save Sea, Ombai Strait

78

ID: MS144

FRESHWATER INTRUSION DURING EBB AND FLOOD TIDE IN THE BALIKPAPAN BAY

Ivena Benita, Yuli Naulita*, I Wayan Nurjaya Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB

University, Bogor, Indonesia *Corresponding author: naulita@apps.ipb.ac.id

Abstract The Balikpapan Bay waters is influenced by freshwater discharge from many rivers empties into it and its distribution is affected by tidal current. The purpose of this study is to calculate sea water intrusion during flood tide and freshwater intrusion during ebb tide, by using freshwater fraction method and box model. Salinity profiles obtained from 45 Conductivity Temperature Depth (CTD) observations and current measurement from Acoustic Doppler Current Profiler (ADCP) in 17 – 25 Mei 2018 were used to analyze freshwater fraction and its transport volume. The result shows that freshwater fraction while tides is heading to flood, have been decreased from inner side to outer side of the bay, about 52.04% in the most inner side and 23.26% in the outer side of the bay. Its transport volume is higher in ebb tides than that in flood tides, and the values varies from 0.24 x 106 m3s-1 to 1.23 x 106 m3s-1. A different feature of freshwater fraction is found when tides is heading to ebb. The biggest freshwater fraction is found in the middle of the bay (43.99%) in where the outfalls of many rivers are located. Then the intrusion of freshwater is calculated using box model. When the tides is heading to flood in the outer side of the bay which next to ocean, sea water pushes the freshwater towards the right side of the bay, with salinity budget in surface of -95.35 x106 psum3day-1, and become higher while heading to ebb tide towards outer part of the bay, that is to -194.27 x106 psum3day-1. Salinity budget in surface that comes out of the system during flood tide along is -116.33 x106 psum3day-1 and during ebb tide is -125.48 x106 psum3day-1. Keywords: box model, freshwater fraction, tides, Balikpapan Bay

79

ID: MS124

STUDY OF WATER DISCHARGE IN THE ULEE LHEUE PORT CHANNEL, INDONESIA

Ichsan Setiawan1*, Faliqul Isbah2, Muhammad Muhammad1, Syarifah Meurah Yuni3, Syahrul Purnawan1, Akram Akram4, Yopi Ilhamsyah1

1Department of Marine Sciences, Faculty of Marine and Fishery Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia

2Universitas Teuku Umar, Meulaboh, 23681, Indonesia 3Department of Mathematics, Faculty of Mathematics and Natural Sciences, Universitas Syiah

Kuala, Banda Aceh 23111, Indonesia 4Department of Mechanical Engineering, Faculty of Engineering, Universitas Syiah Kuala,

Banda Aceh 23111, Indonesia *Corresponding author: ichsansetiawan@unsyiah.ac.id

Abstract Ulee Lheue serve as Ferry ports in Banda Aceh, covering an area of ± 8 Ha. The information of water flow entering the port channel is needed to determine the quantity of water and facilitating transportation at the port. This study includes the measurement of water depth, channel width, current velocity, water discharge, and tides which was conducted every 3 hours at three different water depth. On Jumadil Awal 1-29, 1435 Hijra, the highest and lowest water depth of 6.06 and 3.82 meters occurred in the 23rd and 10th day at 09:00 and 16:00 local time, respectively. The highest and lowest velocity of 0.357 and 0.01 m/s occurred in the 15th and 18th day at 09:00 and 12:00 local time, respectively. The strongest and weakest discharges of 177.93 m3/s and 9.47 m3 /s occurred in the 12th and 28th day at 09:00 local time, respectively. The results found a strong correlation between water discharge and current velocity. Thus water discharge and currents play an important role in the channel stability and in controlling sea transportation in terms of scheduling the departures and arrival of ships. Keywords: depth, current velocity, water discharge

80

INDONESIAN THROUGHFLOW WATER ALONG EASTERN PATHWAY FROM A CTD ARGO FLOAT

Aulia Rahma, Agus S. Atmadipoera*, Yuli Naulita Departement of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB

University *Corresponding author: atmadipoera_itk@ipb.ac.id

Abstract

Indonesian Throughflow Water along Eastern pathway from a CTD Argo Float, Eastern pathway of the Indonesia Throughflow (ITF) conveys a secondary ITF inflow that brings North/South Pacific water entering interior Indonesian Seas. Transformation of ITF water masses along this pathway is considered to be much stronger compared due to strong vertical mixing induced by internal tide. For the first time since 2016, CTD Argo float measurement is available following the ITF path - along Maluku-Seram-Banda Seas, providing prime datasets to understand better change of ITF water. This paper aims to investigate transformation of ITF water masses and the percentage of water mass contribution (with Optimum Multi-parameter - OMP method) along its eastern path of ITF between Maluku - Seram and Banda Seas. The result shows that along the path, North Pacific water origin is predominant in Maluku and Southern Banda Sea, but lower thermocline water of South Pacific water origin in Seram and northern Banda Sea. Large transformation of ITF water is indicated with salty upper-thermocline water in Maluku - Seram Seas, but fresh thermocline water in Banda Sea. Spatial variation of mixing layer depth and thermocline depth is also found. Percentage of water mass contribution analysis will be presented in the seminar. Keywords: ITF water, eastern pathway, CTD Argo float, optimum multi-parameter analysis, stratification, transformation of water masses

81

ID: MS107

VARIABILITY OF ITF - FRONT AT 110OE IN THE INDO - AUSTRALIAN BASIN: FROM CTD ARGO FLOAT DATA

Iis Susiani, Agus S Atmadipoera*, I Wayan Nurjaya

Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Corresponding author: atmadipoera_itk@ipb.ac.id

Abstract

In the eastern Indian Ocean, the Indonesian Throughflow (ITF), as key branch of global thermohaline circulation flows zonally between 8 ES and 14 ES reaching western part of tropical Indian. In the Indo - Australian Basin the distinct homogenous ITF thermocline/intermediate water are surrounded by Indian water masses forming ‘ITF front’ where its variability is considered to be important on controlling ocean circulation and regional climate variability over the region. The objective of this paper is to investigate spatial and temporal variability of ITF - front at 110 EE in the Indo - Australia Basin waters. The 15-years (2004 - 2015) of monthly gridded CTD Argo float datasets were used in this study, and EOF/PSD method and Hovmoller diagram are applied to analysis the data. It is shown that spatial pattern of seawater temperature and salinity of ITF - front can be described by the 5 biggest EOF modes which accounts for 88.6% and 80.7% of the total variance, respectively. The first EOF mode of temperature which account for 67.9% explained variance reveals spatial pattern which is out of phase between upper layer and thermocline layer. Surface fresh Java sea water contributes significantly in the upper layer while salty thermocline Indian water and homogeneous ITF water are predominant in the thermocline layer. Intrusion of Indian water at 200 - 300 m depth is seen from EOF mode 2 of salinity which accounts for 13.6% explained variance, indicated by the salinity maximum of South Indian Subtropical Water (STW). EOF principal components of temperature and salinity show temporal variability of variables from intraseasonal, annual, to inter-annual scales. On inter-annual scales, fluctuation of temperature and salinity is well correlated with ENSO and IODM, as previously expected. Keywords: Eastern Indian Ocean, EOF analysis, Gridded CTD Argo float, Indonesian Throughflow, Indo-Australian basin

82

ICMS 2019

INTERNATIONAL CONFERENCE ON MARINE SCIENCE “Towards Sustainable Marine Resources and Environment”

Topic 3: Marine Technology

83

ID: MT140

SPATIO-TEMPORAL WAVEFORM RETRACKING ANALYSES OF ALTIMETRY SATELLITE DATA IN HALMAHERA SEA

Maya Eria Br Sinurat1*, Bisman Nababan2, Jonson Lumban Gaol2

1Marine Technology Program Study, Graduate School of IPB University, Bogor 2 Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences,

IPB University, Bogor, Indonesia *Corresponding author: maya_eriabrsinurat@apps.ipb.ac.id

Abstract

The accuracy of estimated sea surface height (SSH) from altimetry satellites is strongly influenced by the waveform shape. The shape of waveform is influenced by the condition of the waters both spatially and temporally. A waveform, the microwave reflection signals from altimetry, is generally in the form of ideal shape (Brown) in offshore. However, in coastal, shallow, and small island waters, waveform patterns are normally very complex due to the reflection of signal interfered from land so that SSH estimates become inaccurate and need to be reprocessed with other algorithms (retracking). The purposes of the study were to identify waveform spatially and temporally and find the dominant retracking algorithm producing better SSH estimate in Halmahera Sea. The data used for this study were SGDR-D of Jason-2 and Jason-3 satellite altimetry from 2016 until 2018. Waveforms in deeper waters but closer to coast generally tended to approach peaky pattern while waveforms in shallow water in which further away from the coast were generally dominated by Brownish with peaky patterns. The best retracker in Halmahera Sea was the Threshold 10% both spatially and temporally with Improvement Percentage (IMP) value of 96.71% and percentage of occurrence of 31% for two years.

Keywords: waveform, retracking, Jason, altimetry, Halmahera Sea

84

ID: MT139

WAVEFORM RETRACKING OF ALTIMETRY SATELLITE WITH FUZZY LOGIC SYSTEM IN NATUNA WATERS

Rizki Dimas Permana1*, Bisman Nababan2, James P. Panjaitan2

1Marine Technology Program Study, Graduate School of IPB University, Bogor 2 Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences,

IPB University, Bogor, Indonesia *Corresponding author: rizki_permana@apps.ipb.ac.id

Abstract

Waveform retracking analyses have been proven to increase the accuracy of sea surface height (SSH) estimation from satellite altimeter data in coastal areas. However, it seems that each retracking algorithm has its strength and weakness so that no dominant algorithm can be found that can be applied in coastal regions. This purpose of this study was to obtain the best SSH values from altimeter satellite data using retracking waveform analyses with fuzzy logic system. the fuzzy logic system was used to select the best SSH values from the results of retracking. The data used in this study was level-2 SGDRD data from Jason-2 dan Jason-3 in Natuna Waters in 2017 obtained from ftp://avisoftp.cnes.fr/AVISO/pub. Waveform retracking with fuzzy logic system can reduce standard deviation of SSH estimation up to 23.3 cm from the on-board Standard deviation. The highest IMP value from each observation track was constantly generated by retracking with fuzzy system up to 70.3%. The result showed that retracking waveform analyses using fuzzy logic system can produce SSH estimate values with the best accuracy in each observation track.

Keywords: waveform retracking, fuzzy logic, Jason-2, Jason-3, altimetry

85

ID: MT132

SPATIAL AND TEMPORAL VARIABILITY OF GEOSTROPHIC CURRENTS IN THE INDO-AUSTRALIAN BASIN USING GRIDDED ARGO FLOAT DATA

Julian Saputra1, Jonson Lumban Gaol2*, James P Panjaitan2, Agus Saleh Atmadipoera2

1Graduate Program of Marine Technology, IPB University, Bogor, Indonesia 2Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University, Bogor, Indonesia *Corresponding author: jonson_lumbangaol@yahoo.com

Abstract

Geostrophic current variability in the Indo-Australian Basin (IAB) of eastern Indian Ocean is analyzed by using monthly gridded salinity and temperature data sets (between 2004 and 2016), from CTD Argo float. Geostrophic current is derived from dynamic height calculation. We applied time-series EOF analysis by decomposing geostrophic zonal component into dominant variability in several major modes. The variability of geostrophic currents from CTD Argo data analysis had differences, both spatial and temporal variability. There were four major modes, accounting for of 50.47% of the sum explained variance. The anomaly that occurred near the southern coast of Java cannot be detected due to the limited spatial coverage of the Argo float distribution. The spatial pattern in the first mode was indicated by positive anomaly at 110°E-114°E and 7°S-13°S. Furthermore, negative anomaly showed in the southern part of the study area. Variability oscillated with annual, semiannual and inter-annual periodicity. In the second mode, there was a negative anomaly at 10°S-16°S, the rest of area were shown as the positive anomaly. Variability oscillated with semiannual, annual and inter-annual periodicity. In the third and fourth mode, they showed variability with the interannual, annual and inter-annual periodicity.

Keywords: Indo-Argo float, geostrophic zonal component, time series analysis EOF, variability

86

ID: MT145

REVIEW INUNDATION MAPPING IN COASTAL AREA OF JAKARTA USING SYNTHETIC APERTURE RADAR AND LANDSAT 8

Asmadin1*, Vincentius P Siregar2, Ibnu Sofyan3, Indra Jaya2, Antonius Bambang Wijanarto

1Faculty of Fisheries and Marine Sciences, Halu Oleo University, Kendari, Indonesia 2Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University, Bogor, Indonesia 3Geospatial Information Agency, Indonesia

*Corresponding author: asmadin234@gmail.com

Abstract

Unlike optical sensor, synthetic aperture radar (SAR) provides valid measurements through cloud/shadow covers with high resolution. Combining the two remote sensing systems has many advantages in mapping inundation. The main purpose of this research is to observe coastal inundation in Jakarta using SAR Sentinel 1A and Landsat 8 satellites The methodology research used InSAR and polarization analysis in seeking inundation using GRDH (Ground Range Detection High Resolution) SAR Sentinel 1A. Landsat images used Normalized Difference Water Index (MNDWI) and Dynamic Surface Water Extent (DSWE). The result of the study showed that SAR Sentinel 1A was able to be mapping of inundation with value of water backscatter coefficient -19dB from single polarization of VV and VH. Dual polarization analysis VH+VV showed coastal inundation larger than polarization analysis VV. Multi-spectral sensors was mapping of inundation with value of spectral reflectance of water >0. However, overall optic analysis did not eliminate shadow/cloud noises in some vulnerable areas. They are not yet satisfactory, for the detection flood of beneath-mangrove, along reservoirs and dike or for the urban flood detection using fine resolution SAR and optic sensors.

Keywords: Synthetic Aperture Radar, Landsat 8, sentinel 1A, coastal Inundation, Jakarta

87

ID: MT138

GIS-BASED SPATIO-TEMPORAL ANALYSIS ON YELLOW FIN TUNA FISHING CATCH IN WESTERN INDIAN OCEAN

Nurholis1, Jonson Lumban-Gaol2*, Achmad Fachrudin Syah3

1Graduate School of Marine Technology Program, IPB University, Bogor, Indonesia 2 Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences,

IPB University, Bogor, Indonesia 3Marine Science Study Program, Faculty of Agriculture, Trunojoyo University, Madura,

Indonesia *Corresponding author: Jonson_lumbangaol@yahoo.com

Abstract

Western Indian Ocean (WIO) known as spawning ground, feeding ground and potential fishing ground for tuna species in Indonesia. Yellow Fin Tuna (YFT) is the one of potential export quality commodity from this area that support the national fishing productivity. Spatio-temporal analysis of YFT fishing activity could give us new perception and perspective on studying the patterns and dynamization of this fisheries resource exploration. This study was carried out in a productive water including Mentawai strait and offshore Mentawai, generally part of Western Indian Ocean (WIO) and WPP RI 572. Fishing data were collected between 2014 until 2018 from handline fishermen’s daily logbooks that accessed from Bungus fishing port. Data were organized into a database and structured on a geographical reference to allow GIS-Based analysis. We performed 4 spatial indicators for analyzed spatio-temporal distribution behavior such as central tendency, spatial dispersion, directional dispersion and directional trends. We also rasterized the catch (kg), effort (days at sea) and calculate the CPUE (kg/effort) for finding fishing dynamic information spatially. The result of GIS-based analysis showed a good visualization of catch, effort and CPUE distribution patterns, underlining the annual differences of geographical distribution and fishing pattern. The centered fishing activity monitored in 2014 while the more dispersed fishing activity monitored in 2017. The geographic orientation of spatial distribution monitored at range between 72,90o until 176,15o. GIS provide an important and powerful tool to analyze fishing information, it can add new approach on YFT study and help decision makers in the WIO Tuna management.

Keywords: spatial indicators, GIS-Based, geographical distribution, fishing pattern, CPUE

88

ID: MT141

BIG EYE TUNA FISHING GROUND ANALYSIS USING OCEANOGRAPHY FEATURE IN EASTERN INDIAN OCEAN

Atika Kumala Dewi1*, Jonson Lumban-Gaol2, Vincentius P. Siregar2, Agus S. Atmadipoera2

1Marine Technology Program Study, Graduate School of IPB University, Bogor 2Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University, Bogor, Indonesia *Corresponding author: atikakumaladewi@gmail.com

Abstract

The Fuzzy Inference System method is one reasoning algorithm for making decision. This method has been carried out in various fields, one of which is to map fishing areas. Estimation of bigeye tuna fishing areas were analyzed using oceanographic parameters including sea surface high (SSH) data, sea water temperature, chlorophyll-a (Chl-a) and fisheries logbook including the coordinates of big eye tuna fishing from 2016-2017. The study area focuses on the eastern Indian Ocean region, especially the South Java-Bali waters. Prediction of fishing area is described based on seasonality and average per month. The results in this paper show the variability of oceanographic parameters such as SSH, sea water temperature, and Chl-a, and regional plots that have the potential for fishing activities for bigeye tuna. Regarding the prediction of large eye tuna fishing areas, the results of the fuzzy inference system model are verified using fisheries logbook data to determine the level of truth of the model.

Keywords: fuzzy inference system, fishing areas, bigeye tuna, oceanographic parameters, eastern Indian Ocean

89

ID: MT144

PREDICTION OF FISHING ZONE POTENTIAL BY UTILIZE VISIBLE INFRARED IMAGING RADIOMETER SUITE (VIIRS) SATTELITE SENSOR IN JAVA SEA

Dominggus S.H.L.M.K Awak1*, Jonson Lumban Gaol1, Dony Kushardono2

1Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

2Remote Sensing Applications Center, Indonesian National Institute of Aeronautics and Space *Corresponding author: koreriawak@gmail.com

Abstract

The Java Sea is one of the zones are high of fishing activities. Some approaches have been carried out, one of which is by utilizing the sensor Day / Night Band (DNB) of the Radiometer Suite (VIIRS) Visible Infrared Imaging satellite can detection the ships activity at night by ship's light. The purposive random sampling method of ships is used for field surveys. Daily accumulation data that can be detected at night in 2016, 2017 and 2018 and fisheries statistics in Java Sea. The result is VIIRS sensor show that dominant nighttime activity occurs in the Java Sea so the VIIRS sensor can support to predict potential fishing zones.

Keywords: Java Sea, VIIRS, DNB

90

ID: MT142

COMPARISON OF SEVERAL CLASSIFICATION ALGORITHMS ON SEAGRASS DISTRIBUTION MAPPING BASED ON PROJECT BY APPLYING SEVERAL SEGMENTATION SCALES IN PAJENEKAN

WATERS, SOUTH SULAWESI

Turissa Pragunanti Ilyas1, Bisman Nababan2, Hawis Madduppa2, Dony Kushardono3 1Marine Technology Program Study, Graduate Study, IPB University, Bogor

2Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

3Remote Sensing Utilization Center, National Aeronautics and Space Agency, Jakarta *Corresponding author: simson_naban@yahoo.com

Abstract

The dynamic of seagrass ecosystem can be determined using satellite data. In this study, we used pixel-based and object-based to map a dynamic ecosystem seagrass. The purpose of this study was to determine a dynamic mapping of seagrass ecosystems employing two classification methods i.e., pixel-based and object-based classification in Gusung island waters, Selayar, South Sulawesi. The Satellite SPOT-7 Data was used with a resolution of 6x6 m2. The accuracy assessment used a confusion matrix of 339 observation field points. The results showed that the object-based classification produced the accuracy value of 87%, while pixel-based classification produced an accuracy value of 79%. In addition, both classifications indicate the addition of seagrass ecosystem from 2016 to 2018 with an additional area of 12.8% for object-based classification results and 13.6% for pixel-based classification results. The study showed that object-based classification produced better accuracy in mapping seagrass ecosystem.

Keywords: dynamics, spatial, benthic habitat, seagrass, accuracy

91

ID: MT135

ANALYSIS OF BENTHIC HABITAT CLASSIFICATION USING HIGH RESOLUTION SATELLITE IMAGERY IN SEBARU BESAR ISLAND, KEPULAUAN SERIBU

Vincentius P. Siregar*, Syamsul Bahri Agus, Adriani Sunuddin, Riza A. Pasaribu, M. Sidik

Sangadji, Ayub Sugara, Esty Kurniawati Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University, Bogor, Indonesia *Corresponding Author: vingar2016@gmail.com

Abstract

Remote sensing technology can provide spatial information in the study of mapping shallow benthic habitat. Benthic habitats in the waters have ecological and economic functions for the environment and surrounding communities. Sebaru Besar Island is one of the islands included in the Kepulauan Seribu National Park area which has not been widely explored. This study aims to mapping the shallow water benthic habitats on Sebaru Besar Island, Kepulauan Seribu. This study utilizes high resolution multispectral imagery, namely Citra WorldView-2 (2018) and SPOT 6 (2017) Images for mapping benthic habitat. The classification of multispectral images was carried out with two approaches, namely the application of the MLH algorithm and DII transformation on both satellite imageries. The number of benthic habitat classes produced are eight habitat classes from each image used. The results of the analysis show that the overall accuracy in Worldview 2 and SPOT 6 images is 61.29% and 51.61%. Keywords: multispectral imagery, benthic habitat, MLH, Kepulauan Seribu

92

ID: MT102

MULTIPLE ATTENUATION METHODS IN SHORT-OFFSET 2D MARINE SEISMIC DATA: A CASE STUDY CENDRAWASIH BAY

Naufal H. Yuza1*, Tumpal B. Nainggolan2, Henry M. Manik1*

1Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

2Marine Geological Institute, Bandung *Corresponding author: naufalhamdani80@gmail.com

Abstract

Real marine seismic data are typically embedded with free-surface multiples energy, which are troublesome in imaging an accurate seismic cross-section. In addition, more challenging situation is to bring optimum result with a short-offset streamer due to the coherent nature of multiples. In this study, we present a comparison of three methods for attenuating free-surface multiples energy in short-offset 2D seismic data from Cendrawasih Bay. Multiple attenuation methods include F-K filter, Radon transform, and Surface Related Multiple Elimination (SRME) are processed until the final Pre-Stack Time Migration (PSTM) results. Predictive deconvolution is applied in order to suppress short period multiples prior to free-surface multiple attenuation method. Predictive deconvolution successfully identifies and removes the predictable wavelet of short period multiples. Radon transform shows poor result in short-offset seismic data even if it is combined with F-K filter method. Combination of both F-K filter and SRME are successfully attenuate free-surface multiples and should be considered as proper solution to increase signal to noise ratio.

Keywords: free-surface multiple, F-K filter, radon transform, Surface Related Multiple Elimination, Cendrawasih Bay

93

ID: MT136

DETECTION AND MAPPING OF KM SINAR BANGUN SHIPWRECK USING MULTIBEAM ECHOSOUNDER IN TOBA LAKE WATERS

Harjo Susmor1, Gentio Harsono1, Henry M. Manik2, La Elson3* 1Center of Hydrography and Oceanography, TNI-AL, Jakarta

2Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

3Program of Study of Marine Technology, the Graduate School, IPB University, Bogor, Indonesia

*Corresponding author: laelsonocean@gmail.com

Abstract

Multibeam echosounder (MBES) is a very good instrument to detect and mapping the shipwreck. This technology is able to do the sounding of the seabed with high accuracy and wide coverage. The purpose of this study is to detect and mapping the location of the sinking of the passenger ship KM Sinar Bangun that experienced an accident tragedy on June 18, 2018 in the Toba Lake waters using multibeam echosounder acoustic technology at a frequency of 300 kHz. Data acquisition was carried out on June 21, 2018 until July 3, 2018. Processing and analysis of data using HIPS and SIPS of Caris software. The detection results showed that the depth of the water at the mapping location varied from a depth of 9 m to 498 m. The results of the MBES BASE surface obtained objects detected at an estimated depth of 454 m at position 02° 47' 03.7163 N - 098° 46' 10.4043 E. The dimensions of the object are 30 m long, 14 m wide and elevation of 5 m, allegedly as the passenger ship of KM Sinar Bangun which suffered an accident in the Toba Lake waters on June18, 2018.

Keywords: mapping, multibeam echosounder, shipwreck, Toba Lake waters

94

ID: MT114

DEVELOPING SIGNAL PROCESSING OF ECHO SOUNDER FOR MEASURING ACOUSTIC BACKSCATTER

Henry M. Manik1*, Yasushi Nishimori2, Yoshihiro Nishiyama2, Takuto Hazama2, Akinori Kasai2,

Randi Firdaus3, Andi Yaodi NY3 1Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University, Bogor, Indonesia 2Furuno Electric Co., Ltd 9-52 Ashihara-cho, Nishinomiya 662-8580 Japan

3Graduate Student, Marine Technology Study Program, IPB Graduate School, IPB University, Bogor 16680 Indonesia

*Corresponding author: henrymanik@ipb.ac.id

Abstract

Scientific echo sounder has become indispensable tools for fisheries resources surveys. Unfortunately, this echosounder is deal with high price, difficult to operate, and several systems is not portable. For this purpose, we developed a quantified echosounder with cheap price and portable. By using acoustic signal processing method, this sounder has enabled estimation of the fish target strength (TS), volume backscattering strength (SV), and to extract more sophisticated information. The performance of the sounder was evaluated in an experimental water tank and its detection range was estimated to confirm its effectiveness. Application of the method to detect underwater objects such as fish, aquatic plant, and seabed is demonstrated.

Keywords: acoustics, quantified echo sounder, real-time classification, fish, aquatic plant

95

ID: MT115

EVALUATION OF ADCP BACKSCATTER COMPUTATION FOR QUANTIFYING SUSPENDED SEDIMENT CONCENTRATION

Henry M. Manik1*, Susilohadi2, Randi Firdaus3

1Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

2Marine Geological Institute, Bandung 3Graduate Student, Marine Technology Study Program, IPB Graduate School, IPB University,

Bogor 16680 Indonesia *Corresponding author: henrymanik@ipb.ac.id

Abstract

Acoustic Doppler Current Profilers (ADCP) originally designed for measuring ocean current and its velocity profiles. In fact, ADCP is not only limited to measure the ocean current velocity but include the acoustic backscattering intensity which is related to the concentration of suspended sediment. A relationship between the backscattering intensity and suspended sediment concentration can be analyzed. The concentration of suspended sediment can be estimated using the information of backscattering intensity. Compared with the traditional method, this ADCP approach has many advantages in providing spatial and temporal data. In this paper, the method of quantifying suspended sediment concentration from acoustic backscattering measured by ADCP instrument has been studied systematically.

Keywords: ADCP, backscatter, conversion, suspended sediment, concentration

96

ID: MT137

MEASUREMENT OF FOOT OF SLOPE THE EAURIPIK RISE USING MULTIBEAM ECHOSOUNDER IN NORTHERN PAPUA WATERS

La Elson1, Henry M. Manik2*, Udreck3

1Program of Study of Marine Technology, the Graduate School, IPB University, Bogor 2 Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences,

IPB University, Bogor, Indonesia 3Agency for the Assessment and Application of Technology, Jakarta

*Corresponding author: henrymanik@ipb.ac.id

Abstract

Multibeam echosounder is a very good instrument to detect and measure the seabed topography that determining the foot of the continental slope. The working principle of this technology is widened and vertical radiance pattern of beam that follows the hull, which every beam will detect one of the point depth and linked to form the seabed morphology profile. This study aims to determine the foot of the continental slope the position in the northern Papua waters, particularly in the part of Eauripik Rise, related to the continental shelf of Indonesia determination that more than 200 NM. Bathymetry data obtained from the survey in 1998 - 2012 at the region 2° S - 10° N and 135° - 150° E. The equipment is included Mirai vessel, acoustic system multibeam echosounder type sea beam 2112.004, GPS, attitude and positioning sensor Coda Octopus F 180, and other ancillary equipment. The equipment for data processing such as windows and Linux computers system supported by software Caris and HIPS of SIPS 7.0, MATLAB 10 and ArcGIS 10. Data processing includes bathymetric data correction and determination of the foot of the continental slope was computed using mathematical model approach and seabed topography form. Correction of bathymetry data was conducted using IHO 2008 standard. Position of the foot of the continental slope located at coordinates 0° 00' 01,53 ‒ 7° 59' 44,85 N and 139° 43' 23,86 ‒ 144 ° 05 '00,47 on the depth ranging between 3.506,30 meter to 4.298,20 meter and at a distance foot of the slopes between 116,16 to 347,19 kilometers from the peaks Eauripik rise. The position of each foot of continental slopes divided into three locations towards the west and east from the top of Eauripik rise in the northern Papua waters.

Keywords: foot of the Eauripik rise slope, multibeam echosounder, northern Papua waters

97

ID: MT120

SOUND CHARACTERISTIC OF Procambarus clarkia

Muhammad Hisyam, Totok Hestirianoto*, Indra Jaya Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University, Bogor, Indonesia *Corresponding author: totokhestirianoto@ipb.ac.id

Abstract

Procambarus clarkii is one of the freshwater lobsters which has its own characteristics. Those characteristics used to identify Procambarus clarkii in nature. One of these characteristics is the sound which can be determined using the bioacoustics method. This research uses the bioacoustics method to obtain the sound characteristics from Procambarus clarkii considering this species is invasive in Indonesia. Sound characteristic of this species are obtained by processing sound data into FFT value. The results of processing sound data from recording for three days show that Procambarus clarkii produces snap sound with an average frequency range from 0.3 kHz to 0.4 kHz

Keywords: bioacoustics, Procambarus clarkii, snap, sound characteristic

98

ID: MT121

COMPARISON OF SEAHORSE (Hippocampus kuda) TARGET STRENGTH BASED ON THE PRESENCE OF BROOD POUCH: A DORSAL AND VENTRAL ASPECT HYDROACOUSTIC EXPERIMENTS USING

ARTIFICIAL NEURAL NETWORK

Dony Apdillah1*, Indra Jaya2, Henry M Manik2, Totok Hestirianoto2, Muhammad Iqbal2, Mahesa GA Satria2

1Department of Marine Science, Faculty of Marine Sciences and Fisheries, Raja Ali Haji Maritime University, Indonesia

2Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

*Corresponding author: donyapdillah@umrah.ac.id

Abstract

The hydroacoustic approach has been used as tool in fisheries research for detection and characterization of marine organism. In this paper we study seahorse acoustic backscattering or known as target strength (TS) using active acoustic system. The seahorse has unique properties, where male seahorse has brood pouches. Male seahorse is the one who experience pregnancy and keep their children in their stomach pockets until they hatch. The present of the brood pouches was affected the acoustic backscatter response, hence it opens up the possibility of using acoustic signatures to distinguish their sex through an active acoustic method. The acoustic measurement of seahorse was done using the water tank experiment. Recording of seahorse acoustic data was done by using the scientific echosounder single beam SIMRAD EK-15. Signal processing was performed using Sonar-4 software. The results of mean TS value of pregnant male seahorse (with brood pouch) was smaller than female seahorse (without brood pouch), due to the internal anatomy structure composition of the brood pouch that reduced the backscattering sound. The artificial neural network was then applied to examine if there was different response in the TS of H. kuda with brood pouch (pregnant male) compared to H. kuda without brood pouch (female). The result shows that there was a difference, with accuracy 87.5% on the dorsal aspect and 98.6% on the ventral aspect. Hence, it is possible in the future to distinguish the sex of seahorses acoustically.

Keywords: seahorse, target strength, hydroacoustic, brood pouch, artificial neural network

99

ID: MT122

COMPARISON OF ZOOPLANKTON ABUNDANCE ESTIMATION USING BONGO PLANKTON NET METHODS AND UNDERWATER ACOUSTIC METHODS

Ellis N Ningsih*, Amanda AP Febrianti, Riris Aryawati, Freddy Supriyadi

1Marine Science Department, Sriwijaya University, Indonesia 2Student of Marine Science Department, Sriwijaya University, Indonesia

3Research Institute for Inland Fisheries and Extention *Corresponding author: ellis_nurjuliasti@unsri.ac.id

Abstract

Zooplankton is one of the factors that can affect water conditions. The existence and abundance of zooplankton can indicate the level of fertility in the waters. Zooplankton abundance can be known by using two methods, the first conventional method is using a bongo plankton net and the second method is underwater acoustics method. This study aims to determine the abundance of zooplankton using bongo plankton net methods and underwater acoustics methods. This study was conducted in October 2018 in Banyuasin Estuarine waters. The results showed the abundance of zooplankton using bongo plankton net ranged from 7-116 Ind/m3 and the zooplankton density in underwater acoustics ranged from 0-2.700 Ind/m3. It means that the ratio between estimation of abundance using bongo-net and underwater acoustics is around 1:20. The comparison is caused by different methods and specifications of each tool that needs further study in order to minimize the comparison obtained.

Keywords: abundance, Banyuasin estuarine, underwater acoustics, zooplankton

100

ID: MT123

STUDY OF FISH DENSITY USING HYDROACOUSTIC TECHNIQUES IN THE WATERS AROUND ROTE ISLAND, EAST NUSA TENGGARA

Mayrani Tika Mulyana, Indra Jaya*, Henry Munandar Manik

Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

*Corresponding author: indrajaya@apps.ipb.ac.id

Abstract

To date, information on the distribution of fish in the waters around Rote Island, East Nusa Tenggara still poorly known. One of themethod used todetect and quantify fish distribution ishydroacoustictechnique. The purpose of this study is to map the distribution of fish density vertically (depth) and horizontally (latitude and longitude) in the Rote Island. The acoustic instrument used SIMRAD EK500 withoperatingfrequency of 38 kHz and 120 kHz. Theacoustic survey was carried out in the waters around Rote Island with parallel track and perpendicular to the coastline. Theresults obtained are fish density detected in the range of 10-1<x <103

individuals/m3. The frequency of occurrence of fish density has a high value at a depth of 60-80 meters withfish density of 101 <x <102, which is thought to be a small pelagic fish. A large density value indicates a small group of fish, while a small density ismost likely to be a large fish. There is a difference in the number of occurrences obtained by using a frequency of 38 kHz and 120 kHz, where the fishdensity detected is higher at a frequency of 38 kHz.

Keywords: acoustic, fish density, Rote Island, SIMRAD EK500

101

ID: MT211

SPATIAL DISTRIBUTION OF SCHOOLING FISH VOLUME BACKSCATTERING STRENGTH IN JAVA SEA

Gusti Bagus Putra Cahyana1, Sri Pujiyati1*, Mohamad Natsir2 1 Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences,

IPB University, Bogor, Indonesia 2Research Institute for Marine Fisheries, Indonesia

*Corresponding author: sripujiyati@yahoo.com

Abstract

Java Sea is an important sea for the fisheries sector because most of the northern coastal population of Java Island still relies on the sea as a livelihood. In general, the Java Sea is included in the category of shallow waters. Backscattering Strength as part of the hydroacoustic characteristics is a factor in estimating fish resources (density and distribution). Schooling is the most important structure in some fish populations. This study aims to process and analyze the distribution of backscattering strength (SV) volume value of fish by using multifrequency echosounder Simrad ME 70 frequency 116 kHz in the Java Sea. The study was conducted on October 17 to November 11, 2017. Data processing was carried out to see the horizontal, vertical, and temporal distribution of fish schooling SV values. SV values were analyzed at a depth of 5 - 70 m. The horizontal distribution of fish SV schooling ranges from -70.00 dB to -35.50 dB with SV values averaging -51.08 dB. The distribution of fish schooling SV based on depth was found to target schooling at a depth of 21-30 meters with a target of 629 with an average SV-64.62 dB. The SV value of schooling of fish against time was found to be the most dominant at 07.00 WIB to 12.59 WIB with a target detected as many as 653 with an average SV of -65.02 dB. The processing results show that the distribution of fish schooling in the Java Sea can be analyzed using the hydroacoustic method.

Keywords: backscattering strength, hydroacoustic, schooling fish, Java Sea

102

ID: MT108

BANTEN BAY WATER QUALITY MEASUREMENT USING HYDROCOLOR: COMPARATIVE EXPERIMENTAL STUDY

Muta Ali Khalifa1*, Mustahal1, Adi Susanto1, Forcep Rio Indaryanto1, Ani Rahmawati1, Dessy

Aryani1, Muhlisin2, Yana Suharyana2, Yunia Rahayuningsih2 1Fisheries Department, Faculty of Agriculture, University of Sultan Ageng Tirtayasa

2Banten Development Planning Agency *Corresponding author: ma.khalifa@untirta.ac.id

Abstract

Banten bay is densely human activities bay that potentially affected to water quality. Water quality measurement methods growing by using smartphone application. HydroColor is smartphone application what using digital camera as sensor of Red, Green, Blue reflectance to estimate Turbidity, Suspended Particulate Material (SPM) and Chlorophyll-a. Aim of this research is compare water quality measurement using HydroColor and Laboratory test. This research conducted in May 2019 at Banten Bay for HydroColor measurement and took water samples. Water samples analyzed in Laboratory of Fish Disease and Waters Inspection, Ministry of Marine Affairs and Fisheries. Result from HydroColor and Laboratory test analyzed by statistic with t-test paired two samples, Pearson correlation (r) and Root Mean Square Error (RMSE). Result for Turbidity and SPM parameters is significantly different. Value of r is 0.25 for Turbidity and 0.17 for SPM, the RMSE is 10.30 NTU for Turbidity and 127.82 gr/m3 for SPM. While, parameter of Chlorophyll-a result is not different significantly with r value of 0.54 and RMSE of 1.90 mg/m3. This condition allegedly influenced by weather condition, stability of platforms and local condition.

Keywords: camera, HydroColor, smartphone, water quality

103

ID: MT108

BANTEN BAY WATER QUALITY MEASUREMENT USING HYDROCOLOR: COMPARATIVE EXPERIMENTAL STUDY

Muta Ali Khalifa1*, Mustahal1, Adi Susanto1, Forcep Rio Indaryanto1, Ani Rahmawati1, Dessy

Aryani1, Muhlisin2, Yana Suharyana2, Yunia Rahayuningsih2 1Fisheries Department, Faculty of Agriculture, University of Sultan Ageng Tirtayasa

2Banten Development Planning Agency *Corresponding author: ma.khalifa@untirta.ac.id

Abstract

Banten bay is densely human activities bay that potentially affected to water quality. Water quality measurement methods growing by using smartphone application. HydroColor is smartphone application what using digital camera as sensor of Red, Green, Blue reflectance to estimate Turbidity, Suspended Particulate Material (SPM) and Chlorophyll-a. Aim of this research is compare water quality measurement using HydroColor and Laboratory test. This research conducted in May 2019 at Banten Bay for HydroColor measurement and took water samples. Water samples analyzed in Laboratory of Fish Disease and Waters Inspection, Ministry of Marine Affairs and Fisheries. Result from HydroColor and Laboratory test analyzed by statistic with t-test paired two samples, Pearson correlation (r) and Root Mean Square Error (RMSE). Result for Turbidity and SPM parameters is significantly different. Value of r is 0.25 for Turbidity and 0.17 for SPM, the RMSE is 10.30 NTU for Turbidity and 127.82 gr/m3 for SPM. While, parameter of Chlorophyll-a result is not different significantly with r value of 0.54 and RMSE of 1.90 mg/m3. This condition allegedly influenced by weather condition, stability of platforms and local condition.

Keywords: camera, HydroColor, smartphone, water quality

104

ID: MT109

THE EFFECTS OF RABBITFISH (Siganus canaliculatus) EXISTENCE IN POLYCULTURE SYSTEM AND FEED TYPE AGAINST THE GROWTH PERFORMANCE OF TREVALLY (Caranx sexfasciatus) IN

FLOATING NET CAGE

Carolus P. Paruntu1*, Suria Darwisito1, Antonius P. Rumengan1, Defny S. Wewengkang2, Henki Rotinsulu2

1Faculty of Fisheries and Marine Science, Sam Ratulangi University, Manado 95115. Indonesia. 2Faculty of Mathematic and Natural Science, Sam Ratulangi University, Manado 95115.

Indonesia. *Corresponding author: carolusparuntu@yahoo.com

Abstract

The objective of this research is to investigate the effects of rabbitfish (S. canaliculatus) existence in polyculture system and feed type against the growth performance of trevally (C. sexfasciatus) in floating net cage. Study on polyculture of trevally and rabbitfish and monoculture of trevally in floating net cage were conducted at the coastal of South Motandoi, South Bolaang Mongondow, North Sulawesi Province, Indonesia. The experiment was designed with three treatments for trevally, namely: monoculture of trevally fed with fresh trash fish + corn oil 4% (Treatment A as control), polyculture of trevally and rabbitfish fed with fresh trash fish + corn oil 4% (Treatment B), polyculture of trevally and rabbitfish fed only fresh trash fish (Treatment C); On the other hand, 2 treatments for rabbitfish, namely: polyculture of rabbitfish and trevally which are fed with only carp pellets + fresh trash fish (1:1) (Treatment D as control) and polyculture of rabbitfish and trevally which are fed with carp pellets + fresh trash fish (1:1) + corn oil 4% (Treatment E). Each treatment consisted of 3 replications. The results show that the daily growth rates of trevally and rabbit fish on polyculture (those are fed mixed corn oil) are 1 % and 0.81 % of body weight; the trevally and rabbit fish on polyculture (those are fed without corn oil) are 0.68 % and 0.56 % of body weight; while the trevally on monoculture is 0.67 % of body weight, respectively. Food conversion ratios of trevally and rabbitfish on polyculture (those are fed mixed corn oil) are 4.86 and 4.16; the trevally and rabbitfish on polyculture (those are fed without corn oil) are 6 and 4.57; while the trevally on monoculture is 6.10, respectively. The mortality rates of fishes both on polyculture and monoculture systems during rearing times are 0 %.

Keywords: Caranx sexfasciatus, feed type, floating net cage, monoculture, polyculture, Siganus canaliculatus

105

ID: MT128

DEVELOPMENT OF MOBILE AND QUANTITATIVE PHYTOPLANKTON CONCENTRATION MEASUREMENT AND ITS APPLICATION

Indra Jaya*, Triana, Muhammad Iqbal

Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

*Corresponding author: indrajaya@apps.ipb.ac.id

Abstract

Development of mobile instrument that can estimate phytoplankton concentration near the sea surface directly and easily is described. The electronic system of the instrument used TCS230 sensor to estimate phytoplankton concentration and Arduino Uno as control center. The development process started from design of instrument so that it will easy to operate, comparison with conventional technique commonly used to measure phytoplankton concentration, and at sea application. The TCS230 sensor with color (RGB) output was correlated with hemocytometers, a conventional technique to measure phytoplankton concentration. The result shows that the instrument equipped with TCS230 has overall good correlation with conventional technique, and combination of red and green on TCS230 sensor is the most suitable color combination to estimate the phytoplankton abundance with correlation coefficient 0.92. Therefore, it can be concluded that the mobile instrument to measure phytoplankton concentration functions properly and correctly to measure the phytoplankton’s concentration in the waters. Keywords: mobile instrument, phytoplankton, sensors, TCS23

106

ID: MT125

N3-AUV: DESIGN AND IMPLEMENTATION

Dhea Fajriati Anas, Syifa Afnani Santoso,Yulianti Ratnasari, Nurhaliza Amalia Lestari, Alifyando Firmandi Pandewo, Muhammad Iqbal, Indra Jaya*

Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

*Corresponding author: indrajaya@apps.ipb.ac.id

Abstract

Autonomous Underwater Vehicle (AUV) is a type of underwater robot that can move and perform pre-assigned task or mission based on program which is installed in the microprocessor/Raspberry Pi in the body of the vehicle. The AUV used motor or thruster to maneuver underwater, and maybe supported by compass, various sensors, and camera that are attached to the vehicle. In this paper we present the development of N3-AUV and a pool test of its performance. The N3-AUV used 8 thrusters, 2 webcams camera, Raspberry Pi, depth sensor, and compass. The vehicle has a torpedo’s like shape, so that it is easier to move in underwater relatively faster, at 1 m/s. With 2 webcams camera, where the first one was placed under the frame, to record image or condition beneath the vehicle below condition and the second one was placed in front of the frame to record the situation in front of the vehicle. The vehicle was also equipped with manipulator that can move from three sides. A pool test was conducted by means of pre-assigning mission, such as navigating passed the goal post, finding and knocking down the underwater object, were carried out successfully.

Keywords: AUV, N3-AUV, underwater robotic

107

ID: MT101

COASTAL SPATIAL ANALYSIS STUDY USING DRONE IMAGERY ON PANJANG ISLAND, JEPARA REGENCY

Johannes R. Sitompul1*, Hendry S. R. Siagian2

1CV. Aksa Jaladhi Angkasatama 2Diponegoro University

*Corresponding author: johannesritersitompul@gmail.com

Abstract

The industry of unmanned aerial vehicles is growing rapidly. With this technology, human activities are greatly facilitated, one of which is exploration and research. Through the use of aerial photography, it is very possible to conduct mapping studies and spatial analysis of coastal ecosystems with high accuracy results. The image used for the analysis is an orthomosaic of the drone DJI Phantom 3 Advance which has 4 multispectral bands with a resolution of 3.86 cm / pixel at cruising altitude 100 meters above ground level. The purpose of this study was to obtain an overview of the structure and map the coastal ecosystem in the western part of Panjang Island, Jepara Regency. The method used is the processing of orthomosaic images using Agisoft Photoscan Pro software, unsupervised classification with water column correction using the Lyzenga algorithm approach, and calculation of ecosystem cover area with masking correction in ArcGIS Desktop 10.3 software. RGB composites are classified and can be mapped and differentiated into five classes namely live coral, dead coral, rubble (coral fragments), seagrass and sand and have an area of 0.607 ha, 1.681 ha, 0.413 ha, 1.064 ha, and 0.643 ha.

Keywords: drone, Lyzenga, mapping, orthomosaic, spatial

108

ID: MT147

IMPLEMENTATION OF SWARM INTELLIGENCE ALGORITHM ON AUTONOMOUS SURFACE VEHICLE (ASV)

Chaidar Aji Nugroho, Ahmad Vidura, Muhammad Rizky Rahman, Muhammad Iqbal, Mahesa GA

Satria, Indra Jaya* Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University, Bogor, Indonesia *Corresponding author: indrajaya@apps.ipb.ac.id

Abstract

Swarm Intelligence (SI) is an artificial intelligence algorithm related with collective work of individual intelligence. To date, SI has been developed and installed on autonomous surface vehicle (ASV). ASV use global positioning system (GPS) in determining position, orientation relative to other ASV, and ability to move to desire direction. Aim of this research is to apply SI algorithm on three ASV to move simultaneously and pre-programmed formation. These three ships were divided into two parts, master ship as a master (order giver) and slave ship as ship that follow master ship. SI algorithm developed using python as its programming language. The formation developed in this research is line and triangle formations.

Keywords: swarm intelligence, autonomous surface vehicle, fleet formation

109

ID: MT148

REAL TIME CORAL FISH IDENTIFICATION USING DEEP LEARNING

Insan Maulana Yusup, Muhammad Iqbal, Indra Jaya* Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University, Bogor, Indonesia *Corresponding author: indrajaya@apps.ipb.ac.id

Abstract

Reef fish is an important part in maintaining the balance of various components in the coral reef ecosystem. The existence of reef fish on coral reef ecosystems is a marker of the ecosystem in good condition. Furthermore, it is important to observe the condition of reef fish in a coral reef ecosystem to determine the population and diversity of reef fish in the ecosystem. Observation of reef fish generally by performing a manual visual census by scuba diver. In Entering the industrial revolution 4.0 era there is a need to develop technology that is used to monitor the condition of reef fish in a coral reef ecosystem. The development of technology will certainly help researchers, and later on ecosystem manager, in observing the condition of reef fish with automatic identification. The technological development that can be done to observe reef fish is by applying deep learning. In this research we used YOLO deep learning algorithm for automatic identification. YOLO has the advantage of faster object detection. Application of deep learning to identify fish automatically is illustrated using underwater video recording of reef fish.

Keywords: reef fish, technology, deep learning

110

ID: MT150

OCEAN WAVE MEASUREMENT AND WAVE ENERGY CALCULATING USING OVERTOPPING POWER PLANT

Ahmad Vidura, I Wayan Nurjaya, Muhammad Iqbal, Indra Jaya*

Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

*Corresponding author: indrajaya@apps.ipb.ac.id

Abstract

Indonesian seas have not been used as a source of electricity yet. One of the potential and abundant source of energy from the sea is ocean waves. This study describes the measurement of the wave characteristics and calculates its spatial and temporal energy in Pari Island Waters which can be utilized as electrical energy using overtopping ocean wave power plants. The energy that can be harvested from ocean waves is calculated by wave energy converter using the Wave Dragon WEC. This converter is the terminator type. Sea waves on the Pari Island are classified as the smooth sea with 0.16-0.51 meters significant wave height and 2-4 seconds period. The calculated WEC can produce energy up to 28 Mega Joules and power up to 6 Mega Watts. Based on this calculation, Wave Dragon can meet the electrical power requirements in Pari Island with the location of the wave energy converter provided in the northeast region of Pari Island which is 18 Km from the Pari Island settlement.

Keywords: energy, overtopping, power, wave, WEC

111

ID: MT127

DEVELOPMENT OF OPERATIONAL COASTAL OBSERVATION SYSTEM FOR THE SAFETY OF THE NAVIGATION AND FISHING

Indra Jaya*, Muhammad Iqbal, Billi R Kusumah, Mahesa GA Satria, Agung Tri Nugroho, Sri Ratih

Deswati Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University, Bogor, Indonesia *Corresponding author: indrajaya@apps.ipb.ac.id

Abstract

Coastal weather and its adjacent waters are dynamic and continuously changing from time to time, sometimes by hours and even by minutes. Many people and activities depend on the information concerning the state of this area, for example for the safety of navigation in and out of the harbor and for fishing in the coastal waters. Hence, there is a need to report the condition of the area as frequently as possible, and in real time. In this paper we describe the development of operational coastal observation system for the safety of navigation and fishing and demonstrate is implementation. The system consists of a network of instrument of automatic coastal weather system (ACWS), acoustic tide gauge, and wave buoy. The ACWS instrument provides wind direction and velocity, air temperature, and air humidity; acoustic tide gauge provides sea level height; and wave buoy provides wave height and energy. Each of these instruments are equipped with transmitting system that are capable of sending data in real time to the web server. A website was developed to compile all the received data stream collected in the server and then presented in the form of a graph, which is more easily understood and more informative in regard to the dynamic condition of the area. A working demonstration of the operational coastal observation system that has been developed and installed in the Seribu Island, Jakarta Bay, Indonesia, will be presented and discussed.

Keywords: operational oceanography, coastal waters, automatic coastal weather system, acoustic tide gauge, wave buoy

112

ID: MT130

GRAPHICAL USER INTERFACE DEVELOPMENT FOR NUSANTARA-AUTONOMOUS SURFACE VEHICLE (N-ASV)

Mahesa GA Satria, Indra Jaya*, Muhammad Iqbal

Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

*Corresponding author: indrajaya@apps.ipb.ac.id

Abstract

Graphical User Interface (GUI) is a platform than can be used to communicate in one or two directions between user and vehicles. With this interface, the users can find out the real time position of the vehicle and its overall performance. A GUI on Ground Control Station (GCS) designed for a Nusantara-Autonomous Surface Vehicle (N-ASV) allows real time data transmission from the vehicle. To ensure whether the N-ASV is operating properly or not, the N-ASV is monitored through its GPS, water quality sensor and underwater video recording attached to the vehicle. The data displayed on the interface includes the position of the vehicle, measured water quality parameters, and underwater video recorded from the bottom of the vehicle. Data is sent wireless from the vehicle to the GCS by utilizing a Wi-Fi connection. This paper explains the development of the Graphical User Interface including Ground Control Station using the Raspberry Pi 3. The main objective of the GUI development is to obtain ease of use, accuracy of data representation, facilitate monitoring and operation of N-ASV in field data collection

Keywords: autonomous, ASV, GCS, GUI

113

ID: MT126

PROSPECT OF USING ACOUSTIC TECHNIQUE FOR QUANTIFYING THE DEGREE OF BIOERODERS IN CORAL REEF ECOSYSTEM

Indra Jaya*, Sekar Asri Mauluddiani, Sri Pujiati, Beginer Subhan

Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

*Corresponding author: indrajaya@apps.ipb.ac.id

Abstract

Acoustic backscattering technique has been used widely for a long time to characterize seabed. Specifically, it has been applied to determine the level of hardness and roughness of the seabed. The acoustic backscattering strength also found to be depended on the porosity, composition, and grain size distribution of the sediment. A bioeroders that infiltrate the surface of the coral could potential kill the “host” in due time if no action is taken. For that matter, first, it is important to detect and quantify this problem as early as possible so that it can be prevented from catastrophic. A preliminary study was conducted to examine the prospect of using acoustic technique to quantify the amount of or the extend of bioeroders in the coral. Acoustic surface backscattering data was collected from different coral with different degrees of bioeroder, and coral with no-bioeroders using scientific acoustic instrument with operating frequency 200 kHz. The mean value of surface backscattering strength (SS) was then compared on each of the corals affected by bioeroders. The results showed that the value of (SS) corals are affected by the degree of bioeroders. Therefore, there is a prospect of using this technique to quantify accurately the degree of bioeroders in coral.

Keywords: acoustic technique, bioeroders, coral

114

ID: MT124

APPLICATION OF ACOUSTIC SCIENTIFIC ECHOSOUNDER EK500 TO DETECT FISH DENSITY DISTRIBUTION IN THE WATERS AT THE EASTERN REGION OF ALOR ISLAND

Izmiyaqin, Indra Jaya*, Henry Munandar Manik

Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

*Corresponding author: indrajaya@apps.ipb.ac.id

Abstract

Information on fish resources and its distribution in the waters around Alor Island, East Nusa Tenggara is still relatively unknown. For that matter, the objective of this study is to determine the distribution of fish density horizontally (latitude or longitude) or vertically (depth) in the waters at the eastern region of Alor Island, using acoustic scientific echosounder SIMRAD EK500 instrument. This instrument is equipped with split beam echosounder transducer system with operating frequency of 38 kHz and 120 kHz. The acoustic survey was conducted in the waters off the north, east and west coast of eastern part of the Alor Island. The result of the survey showed that fish density detected in the surface water dominated by 0,1-100 individual/m3 fish density, in 60-80 meters depth was dominated by 0.1-10 individual/m3, in 80-200 meters depth was dominated by 0.1-100 individual/m3, and in 200-300 meters depth was dominated by 10-1000 individual/m3 of fish density. In addition, the 38 kHz detect higher density of fish compare to 120 kHz.

Keywords: fisheries acoustic, fish density, Alor Island

115

ID: MT104

COMMON REFLECTION SURFACE METHOD IN LOW FOLD COVERAGE SEISMIC DATA OF COMPLEX MARINE GEOLOGICAL STRUCTURES

Destiana Safitri1*, Tumpal B. Nainggolan2, Henry M. Manik1

1Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia 2Marine Geological Institute, Bandung

*Corresponding author: destiana06safitrii@gmail.com

Abstract

The primary objective of seismic data processing is to generate seismic cross-section with an optimum signal to noise ratio to model geological structures imaging as accurately as possible with the actual condition. However, we may look onto complex geological structures with less than adequate number of fold coverage seismic data. In this study, Common Reflection Surface (CRS) method is applied to generate 2D marine seismic cross-sections with better reflector continuity of 3 (three) real data seismic lines. It is based on obtaining the suitable aperture value along the attributes RN, RNIP, and α. Its results are compared to conventional Common Mid-Point (CMP) ones. The final products are presented in multiple-attenuated and time-migrated cross-section with Surface Related Multiple Elimination (SRME) and Kirchhoff Migration techniques, respectively. Comparison of final time-migrated both CRS and CMP stacks show the CRS method is more effective and reliable to model accurate complex marine geological structures with high signal to noise ratio based on reflector continuity and noise reduction.

Keywords: signal to noise ratio, complex geological structure, fold coverage, Common Reflection Surface

116

ID: MT105

ACOUSTIC IMPEDANCE MODEL-BASED INVERSION TO IDENTIFY TARGET RESERVOIR: NIAS WATERS CASE STUDY

Maychel Erryansyah1*, Tumpal B. Nainggolan2, Henry M. Manik1

1Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

2Marine Geological Institute, Bandung *Corresponding author: maychelerryansyah@gmail.com

Abstract

Seismic method is a good geophysical method in imaging the subsurface conditions using the principle of seismic wave propagation. In the stage of seismic interpretation, a good basic knowledge of geophysical and geological are needed regarding the existence and characterization of reservoirs. One method used in interpreting seismic data is the acoustic impedance inversion method. In this study, 2D seismic inversion is carried out to determine the reservoir characteristics of well MCL-1 in the Nias Waters. This study uses model-based inversion which aims to obtain the value of acoustic impedance which is useful for the identification of distribution and reservoir condition of the target zone. The obtained results are the target reservoir zone at a depth of 6649-7434 feet or 1770-1862 ms (in time domain) for well MCL-1 with a range of acoustic impedance values of 28,000 ft/s * g/cc to 49,000 ft/s * g/cc with the type of rock that fills the reservoir is limestone. The correlation value for model-based inversion has a relatively well correlated and small error. This method can successfully characterize the target reservoir.

Keywords: acoustic impedance, model-based inversion, limestone, Nias Waters

117

ID: MT107

IDENTIFICATION OF YAPEN FAULT ZONE USING 2D MARINE SEISMIC DATA AND WELL ANALYSIS

Tumpal B. Nainggolan

Marine Geological Institute Corresponding author: tumpal.bernhard@esdm.go.id

Abstract

Yapen island is located in the northeastern part of Cendrawasih Bay, Papua and is one of the most complex geological regions in the eastern part of Indonesia. The region is considered as frontier area in terms of Indonesia’s borderline territory and limited geophysical and geological data. In this study, we present two newly time-migrated 2D marine seismic cross-section and three wells to identify the Yapen Fault Zone and the subsurface data evaluation of numerous works and publications. The Yapen Fault Zone forms the East-West direction trend with linear coastline of north coast of Yapen island and a submarine ridge extending westward from Yapen to eastern Bird’s Head. Well analysis results show drowning unconformities of carbonate formation which is marked by folded and thrusted horizons on seismic interpretation. The carbonate reservoir is shown thickening eastward to Mamberamo basin in Papua mainland known as Mamberamo Formation. This formation is part of ongoing study for continuity of future hydrocarbon exploration in the region.

Keywords: seismic cross-section, well analysis, carbonate formation, Yapen Fault Zone

118

119

ICMS 2019

INTERNATIONAL CONFERENCE ON MARINE SCIENCE “Towards Sustainable Marine Resources and Environment”

POSTER PRESENTATION

4 SEPTEMBER 2019

120

ID: MF222

BIOLOGICAL ASPECTS AND GROWTH PARAMETER OF INDIAN SCAD (Decapterus russelli, RUPELL, 1928) IN THE SOUTH OF CHINA SEA

Ria Faizah*, Lilis Sadiyah, Wijopriono

Center for Fisheries Research, Gedung Balitbang KP II, Ancol Timur, Jakarta Utara *Corresponding author: faizah.ria@gmail.com

Abstract Indian scad (Decapterus russelli, Rupell, 1928) is one of small pelagic fish that have economic values in the south of China Sea. The objective of this study was to assess several aspects of biological reproduction and growth parameter for Indian scad caught by purse seine in the south of China Sea. The study was conducted from March to August 2014. This study used 395 fish samples with size between 14.1-21.9 cmFL (average 18.9 cmFL) and the sex ratio between female and male was 1:1,09. The growth patterns of Indian scad for male and female were positive allometric expressed by the following equation: W = 0.0093L3.1309 (R2=0.8719) for male and W= 0.0094L3.1359 (R2=0.8576) for female. The condition factors were about 0.25-6.22. Indian scads observed ranged between TKG I and TKG V with IKG for male and female were 0.056- 6.36 % and 0.09 – 6.35 %, respectively. The Von Bertalanffy Growth Equation of Indian scad in the south of China sea was Lt = 23.60 (1 - e 0.6(t+-0.2789)) with the asymptotic length (L∞) =23.60 cmFL, growth coefficient (K) = 0.6 per year and the theoretical age (t0) Indian scad that was equal to (t0) = - 0.2789. Keywords: biological aspects, growth parameter, Indian scad, the south of China Sea

121

MF227

NUTRITIONAL VALUE AND MINERAL CONTENT OF SEAWEED FROM BINUANGEUN BEACH, INDONESIA AND POTENTIAL USE AS FISH FEED INGREDIENT

Lusi Herawati Suryaningrum*, Reza Samsudin

Research Institute for Freshwater Aquaculture and Fisheries Extension, Bogor, West Java, Indonesia

*Corresponding author: lusihera@yahoo.co.id

Abstract

Seaweed represents an important economical resource in Indonesia. They are potentially as good source of nutrient. Furthermore, they have the most nutritious and rich in mineral than any other feedstock. The levels of minerals are ten to twenty times from total mineral content of terrestrial plants. This experiment was carried out to evaluate the nutritional value and mineral contents of some seaweed Ulva, Caulerpa and Palmaria, in order to utilized as fish feed ingredient. Seaweeds were collected from Binuangeun Beach, Banten Province, south coast of Java island. Carbohydrate by different (NFE) and ash contents were the most two abundant components. Seaweeds Caulerpa, Palmaria and Ulva contained 44.73%, 53.74%, 55.31% NFE; and 27.36%, 22.81%, 20.51% ash based on dry weight, respectively. These seaweeds contained high amounts of Na, K, Ca, Mg ranged 0.72-5.65 g 100g-1 and Fe, Mn, Cu, Zn ranged 2.09x10-4-0.09 g 100g-1. The quantity of the bio-essential elements (Fe, Zn, Cu) followed as Fe>Zn>Cu. The iron content was rich in the sequence of Caulerpa>Palmaria>Ulva and its range was found to be 0.01-0.09 g 100 g-1 in dry weight. The result showed that Caulerpa, Palmaria and Ulva are valuable resource and potentially to be utilized as fish feed ingredient. Keywords: Binuangeun, fish feed, mineral, nutrient, seaweed

122

ID: MS203

INFLUENCE OF CROSS EQUATORIAL NORTHERLY SURGE (CENS) ON VARIABILITY OF CHLOROPHYLL-A AND SST IN KARIMATA STRAIT

Tyas Tri Pujiastuti

Indonesia Agency for Meteorology, Climatology and Geophysics (BMKG) Corresponding author: tyas.pujiastuti@bmkg.go.id

Abstract Influence of Cross Equatorial Northerly Surge (CENS) on Variability of Chlorophyll-a and SST in Karimata Strait waters. Cross equatorial northerly surge / CENS was important regional factor that influence in atmospheric dynamical condition in most of Indonesian region. This study aimed to identify CENS influence on spatial variability of SST and chlorophyll parameters. Spatial and statistical analysis conducted using VIIRS data for CENS cases during 2016 showed that CENS, characterized by intensification of surface northerly wind around the equator region, was significantly influenced by the dynamic of the Karimata strait waters. There were SST decreases and chlorophyll increases incurred during CENS period. Keywords: CENS, Karimata Strait, VIIRS

123

ID: MS221

MOLECULAR PHYLOGEOGRAPHY STUDY OF THE DEEP-SEA ASTEROIDS Ceramaster patagonicus AND Ceramaster japonicas IN THE NORTH PACIFIC OCEAN

Masaki Yamamoto, Yuki Kamito, Mikihito Arai, Toshihiko Fujita, Christopher L. Mah, Davin H. E.

Setiamarga* National Institute of Technology, Wakayama College, Japan

*Corresponding author: davin@wakayama-nct.ac.jp

Abstract Ceramaster japonicus and Ceramaster patagonicus are goniasterid sea stars living in the deep sea in the North Pacific Ocean including Japanese waters. Morphologically, they are classified based on the number of adambulacral furrow spines, the size of abactinal granules, and the shape of marginal plates. However, the genetic difference of the two species has not been studied so far. In this study, to study the genetic diversity of the two species from the North Pacific, we sequenced the mitochondrial COI and 12s-rRNA genes and the nuclear DNA spacer region ITS1 from 29 specimens of C. japonicus and 28 specimens of C. patagonicus collected from various area in the North Pacific, and eight specimens of C. arcticus for comparison. Haplotype network analyses using obtained sequences indicated that the two Ceramaster species are not monophyletic, but distinct regional haplogroups which members might include samples of one, two, or all Ceramaster species examined, were recognized. Although the results obtained by the two mitochondrial genes and nuclear ITS1 are in agreement, the number of nucleotide substitutions, and thus number of haplogroups, is different between the mitochondrial haplotype networks and the nuclear one. This was probably caused by the different substitution rates of mitochondrial markers and ITS1. Keywords: Ceramaster, molecular, species, classification, deep-sea

124

ID: MS129

BIODIVERSITY OF MACROALGAE IN PARI ISLAND

Endang Sunarwati Srimariana1*, Mujizat Kawaroe1, Dea Fauzia Lestari1, Aditya Hikmat Nugraha2 1Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB

University, Bogor, Indonesia

2Marine Science Department, Raja Ali Haji Maritime University *Corresponding author: endangsunarwatis@apps.ipb.ac.id

Abstract Macroalgae is one of the marine biological resources that has potential to be utilized further by humans. This research aims to study macroalgae diversity in Pari Island. The study was conducted at two stations using line transect method at reef flat area. Results of this study indicate that there are 17 species of macroalgae found in south of Pari Island and 10 species found at north of Pari Island. Macroalgae species with high abundance are Padina minor and Halimeda opuntia. The highest macroalgae diversity was found at south Pari Island with a value index 2.02. Keywords: biodiversity, macroalgae, Pari Island

125

ID: MS142

SEASONAL DISTRIBUTION OF PHOSPHATE WITHIN TALLO ESTUARY AT THE NORTHERN COAST OF MAKASSAR, SOUTH SULAWESI

Rastina*, I Wayan Nurjaya, Tri Prartono, Harpasis Slamet Sanusi

Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

*Corresponding author: rastina049@apps.ipb.ac.id

Abstract

Phosphate is one indicator of water fertility and is needed to support the life of organisms, especially phytoplankton. The main source of phosphate in the waters naturally originates from the processes of decomposition, weathering or decomposition of plants and comes from the remains of dead organisms. Besides this phosphates in coastal areas are sourced from rivers that carry waste from land, so phosphates in the river mouth are larger than the surrounding waters. The purpose of this study was to describe the pattern of phosphate distribution in the West and East seasons in the Tallo estuary, Makassar using hydrodynamic and distribution models of pollutants. The results of this study indicate the pattern of spreading phosphate in the study site is strongly influenced by oceanographic conditions of the waters. Keywords: phosphate, west and east season, Tallo Estuary, Makassar

126

ID: MS148

CORAL DISEASE AT MANSUAR ISLAND, RAJA AMPAT, PAPUA, INDONESIA

Beginer Subhan*, Dondy Arafat, Fadhilah Rahmawati, Q Muhammad Royhan, Hawis Madduppa, Prakas Santoso, Budi Prabowo

Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia

*Corresponding author: beginersubhan@apps.ipb.ac.id

Abstract

Coral reef has been facing rapid destruction nowadays. Raja Ampat Islands in Papua has one of the highest coral reef diversity and is located within the Coral Triangle area. The coral condition in Raja Ampat is still categorized as healthy. However, it started to show some of the habitat degrading signs. Coral disease is one of the main cause in coral reef ecosystem decline. This study was conducted to measure the level of coral disease based on coral disease category prevalence observation at Mansuar Island in Raja Ampat, Papua. This study was conducted on August 8th–9th 2010 in Mansuar Island, Raja Ampat. The method used in data sampling is by using 5x50 meter Belt Transect. As many as 28 coral genus were found from all of the observation sites with Fungia being the most abundant. There are 7 coral diseases categories, dominated by Tissue Discoloration Non-White. There are 5 coral diseases found namely Yellow Band Disease, White Syndrome, Brown Band Disease, Atramentous Necrosis, and Ulcerative White Spots. Keywords: infectous, Papua, prevalence

127

MS250

POTENTIAL OF ASSOCIATIVE BACTERIA ISOLATES FROM SEAGRASS ECOSYSTEM

Meutia Samira Ismet1*, Endang Sunarwati Srimariana1, Yuni Puji Hastuti2, Elka Dwi Jayenti1, Peni Ismiati1, Rasyid Prasetyo Utomo1

1Department of Marine Sciences and Technology, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia

2Department of Aquaculture, Faculty of Fisheries and Marine Science, IPB University, Bogor, Indonesia

*Corresponding author: ms.ismet@gmail.com

Abstract

Seagrass ecosystems are rich in organic materials such as nitrates, carbon and phosphates. Potential nutrient content available in waters and sediments influences the presence of associative bacterial communities. This study aimed to explore associative bacteria in seagrass ecosystems which have the potentially producing antibacterial activity and cellulase enzymes. Associative bacterial isolation was carried out on sediment samples and seagrass leaves Thallasia hemprichii which was found as the dominant ecosystem compiler. Antibacterial tests were carried out using agar diffusion method againts Staphylococcus aureus, Pseudomonas aeruginosa, Bacillus subtilis, Escherichia coli and Vibrio parahaemolyticus. Meanwhile, assay on cellulase activity of the actinomycetes bacterial were using agar diffusion method on CMC media. Isolation of endophytic bacteria of seagrass leaves produced 12 isolates, with 2 isolates which could inhibit all targetting bacteria, and 3 isolates which could inhibit several targeting bacteria. ANOVA test showed that the sampling location significantly affected the antibacterial activity. Meanwhile, 5 isolates of actinomycetes bacteria were found from the sediments, with 4 isolates having cellulase activity. Correspondent Analysis (CA) showed that cellulase activity of the actinobacteria were associated with the density of C. rotundata and T. hemprichii seagrass species with infrequently up to denses category. Keywords: associative bacteria, antibacterial test, cellulase activity, seagrass

128

ID: MT212

TARGET STRENGTH OF FRESHWATER FISH USING SINGLE BEAM ECHOSOUNDER

Sri Pujiyati*, Putra E. Karo-karo, Andi Y. N. Yaman, Suci Khairiza, Bendrianto, M. Hasbi Sidqi, Riswan Rizqyawan

Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

*Corresponding author: sripujiyati@yahoo.com

Abstract

Carp fish (Cyprinus carpio), black tilapia (Oreochromis niloticus), catfish (Pangasius pangasius), freshwater ell (Anguilla Sp), carp (Ospronemus goramy) and freshwater pomfret (Serrasalmus sp) are the types of freshwater fish consumed widely by Indonesian society. Each type of fish has different acoustic backscatter strength influenced by meat, bubbles and fish behavior at the time of data collection. The value of a single fish acoustic backscatter known as the target strength (TS). The purpose of this research is to get the value of target strength from six species of freshwater fish. Data was recorded using a single beam (cruzpro echosounder and Simrad EK-15 equipment), frequency 200 Hz. The fish acoustic recording method uses the tethered method for 10-13 individual fish from each species. Each fish data record is carried out for 5 minutes and further data processing is done using echo view 3.5. The results showed that the TS values of six species of freshwater fish varied between -53 dB to -41 dB. The relationship of TS with the length of the fish has a correlation coefficient (R) greater than 0.5, which means the length of the fish has a contribution of more than 50%. It can be concluded that the target strength values of six species of freshwater fish give different values and the regression equation is also different.

Keywords: acoustic, fish freshwater, target strength.

129

ID: MT233

LEVEL OF FRIENDLINESS OF THE BOUKE AMI FISHING GEAR TECHNOLOGY AT THE FISHERY PORT NUSANTARA (PPN) KEJAWANAN IN CIREBON

Andi Perdana Gumilang*, Evi Susilawati

Study Program of Fisheries Resource Utilization, Faculty of Fisheries and Marine Sciences, UNTAG Cirebon

*Corresponding author: andiperdanag@gmail.com

Abstract

Technology squid nets (Bouke Ami) are the most used fishing gear used by fishermen in the Fishery Port Nusantara (PPN) Kejawanan. The purpose of this study was to analyze the level of the bouke ami fishing gear based on the Responsible Fisheries Ethics Code (CCRF) on the results of his arrest. The research method is a method of survey and in-depth interviews with related parties related to the results of research and the level of friendliness of environmental equipment. Data analysis was carried out in accordance with 9 criteria for environmentally friendly fishing gear from the Food and Agriculture Organization (FAO). The results of the study showed that 27 species of bouke ami were captured with a total catch of 1,939 tons. The composition of the main catch is greater, which is equal to 82.69% compared to 17.31% bycatch. The value in the ami bounce environment is 27. Based on this value, the bouke ami is classified as a fishing gear which is categorized as an environmentally friendly fishing gear.

Keywords: Bouke Ami, catch, level of friendliness

130

ID: MT246

THE APPLICATION OF GEOTEXTILE TUBE STRUCTURE FOR COASTAL PROTECTION IN PAMEKASAN MADURA

Vivi Yovita Indriasari*, Dwiyoga Nugroho, Agus Sofyan, Dendy Mahabror, Koko Ondara, Rudhy

Akhwady. Marine Research Center, Ministry Of Marine Affairs and Fisheries

*Corresponding author: vivi_yovita@kkp.go.id

Abstract

This study presents an ongoing result from field experiment in using Geotextile tube semi-submersible offshore breakwater to protect Pademawu coastline in Pamekasan, Madura. The coastline is very dynamic, characterized by mud-sandy materials and have an immense erosion to 60 meters in the past 5 years. Erosion bring severe damage to the salt pond construction and belt of coastal vegetation. Therefore, we select the Geotextile tube construction as a soft protection with aim to re-construct the coastline at its initial line. Moreover, the vegetation can be replanted in the sediment trapped zone behind the structure. The construction started on June 2018 with 8 Geotextile tube containers placed at 20 cm contour line above mean sea level. The radiation stress component from the interaction of wave and semi-submersible geotube during the high tide are calculated using the numerical model. Geotextile tube performed very well in absorbing the wave energy. The study presents the results from 8 months of field observation after the construction. Interestingly, the Geotextile tube give a rapid response by of trapping the sediment to 1 meter behind the structures. The present study also presents the adaptation of Geotextile tube with marine environment.

Keywords: geotextile tube, coastal protection, Pamekasan, salt pond

131

ID: MT129

DEEP LEARNING FOR SEAGRASS COVERAGE ESTIMATION USING AUTONOMOUS SURFACE VEHICLE

Mahesa GA Satria1, Indra Jaya1*, Muhammad Iqbal1, Karlisa Priandana2

1Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor, Indonesia

2Dept. Computer Science, IPB University, Bogor, Indonesia

*Corresponding author: indrajaya@apps.ipb.ac.id

Abstract

Underwater vegetation has important role for the coastal environment. Monitoring underwater vegetation, especially seagrass in large area requires great effort, both time and money. The detection and mapping of seagrass can be done by several ways, such as in situ observation by experts, satellite-monitoring techniques, and digital photo- and video-based techniques. Nowadays, digital underwater photo and video images have been used to map the seagrass meadows or monitor their condition. Seagrass detection and mapping using photo and / or video is a quicker, cheaper, and potentially more accurate method. Underwater videography for seagrass detection has many advantages but require more intense manual analysis. To overcome this various handicap, we used machine learning approach with Mask R-CNN algorithm to estimate seagrass coverage automatically. The underwater photos of seagrass bed were obtained from Autonomous Surface Vehicle equipped with underwater camera system. We will present and discuss the R-CNN algorithm and its application for seagrass bed coverage estimation.

Keywords: coverage, deep learning, Mask R-CNN, seagrass

132

ID: MT149

STUDY OF VEGETATION INDEX ALGORITHM AND CLASSIFICATION MODEL FOR MANGROVE DERIVED FROM LANDSAT TM AND ETM+ (CASE STUDY AT KABUPATEN BERAU, EAST

KALIMANTAN)

Risti Endriani Arhatin*, Vincentius P. Siregar, Richardus F. Kaswadji Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, IPB

University, Bogor, Indonesia *Corresponding author: ristyend@yahoo.com

Abstract

Traditional field monitoring of mangrove would be very difficult to survey. Remote sensing is a promising alternative to answer the problem for large-scale tropical mangrove management. The objectives of this study are to validate the accuracy of remote sensing data, namely Landsat TM and ETM+ images, for estimating mangrove forest canopy. This study will compare between two classification units, i.e. Maximum Likelihood and Neural Network Back Propagation Classifiers. The result of the study shows that the best vegetation index algorithm is Infrared Percentage Vegetation Index (IPVI). PCA Result is {2.2867 * (-0.513x2 - 0.532x3 + 0.518x4 + 0.431x5)} + {1.6388 * (-0.486x2 - 0.456x3 - 0.468x4 - 0.580x5)}. The use of neural network back propagation classifier is improving the accuracy of classification result compared to maximum likelihood classifier. Its overall accuracy reach 85.61%.

Keywords: remote sensing, vegetation index, maximum likelihood, neural network, back propagation

133

ID: MT252

DISTRIBUTION OF FISHING VESSELS DERIVED VISIBLE INFRARED IMAGING RADIOMETER SUITE (VIIRS) SENSOR AND VESSEL MONITORING SYSTEM (VMS) IN JAVA SEA

Jonson Lumban-Gaol1, Achmad Fachruddin Syah2, Risti Endriani Arhatin1, Emylia Eka

Kusumaningrum1 and Ruben Van Beek1 1Marine Science and Technology Department, IPB University, Bogor, Indonesia

2Trunojoyo University, Madura, Indonesia *Corresponding author: Jonson_lumbangaol@yahoo.com

Abstract Abstract. This research aims to analyze the distribution of fishing vessels derived from VIIRS and VMS in the Java Sea. The fishing vessels distribution derived VIIRS and VMS were downloaded from NOAA Center for Environment Information and Global Fishing Watch respectively. Measurement of the intensity of the lights during fishing operation was done when the satellite passes through the Java Sea. The fishing vessels that use light during the fishing operation in the Java Sea are Purse seine and Lift net vessels. The intensity of lights varies depending on the number of lights used in the fishing vessels. The intensity of 19 unit lamps at a distance of 2 meters from the light is 3,500 lux while the intensity of 11 unit lamps is 2,000 lux. Fishing vessels distribution based on VIIRS and VMS data shows the same pattern. Generally ships are concentrated along the south coast of Kalimantan Island. Keywords: fishing vessels, VIIRS, VMS, light fishing

134

ID: MT253

IDENTIFYING ILLEGAL FISHERIES IN INDONESIAN MARINE PROTECTED AREAS

Ruben Van Beek*, Jonson Lumban-Gaol, Syamsul Bahri Agus Marine Technology Study Program, Marine Science and Technology Department, IPB

University, Bogor, Indonesia *Corresponding author: ruben_vanbeek@apps.ipb.ac.id

Abstract Fish stocks are depleting, therefore management areas are being set up to preserve marine life in Indonesia. These management areas contain No Take Zones in which all types of fisheries are prohibited. The MPA’s cover about 1.17% of Indonesia’s EEZ. The No Take Zones (Zona Inti) cover approximately 0.026% of Indonesia’s EEZ. It is expected that these areas can help to increase species biomass, species density, species richness, and organism size. And most important, these areas tend to have a positive impact on neighboring areas. However, illegal fisheries activities can heavily disturb the healing processes in an MPA. In Indonesia only, illegal fisheries is estimated to cause an annual loss of 4 billion dollars. Because illegal fisheries are hard to detect in a wide EEZ like Indonesia, this research aims to detect illegal fisheries through Vessel Monitoring System (VMS) and Visual Infrared Radiometer Suite (VIIRS) data. With this data it will be possible to find out which MPA’s and Zona Inti’s are most heavily affected by illegal fisheries. The VIIRS data was obtained from NOAA and the VMS data will be provided by KKP. The earliest results from the VIIRS data show indicate that most illegal fisheries activities take place near the Riau Islands, North Sumatra. This MPA will need a more in depth study in the second phase of this study. Keywords: illegal fisheries, MPA, VIIRS, VMS

135

ID:

ENRICHMENT AND CONTAMINATION OF HEAVY METALS IN THE SURFACE SEDIMENTS OF NORTH SUMATRA

Meta Aprianih, Tri Prartono, Mochammad Tri Hartanto, Santi Susanti

Department of Marine Science and Technology – IPB University Corresponding author: tripr@ipb.ac.id

Abstract

Sediment samples from 6 sampling sites in the North Sumatra, on the western (1-3 site) and eastern (4-6 site), were analyzed for the presence of heavy metals. Total concentration of metals in sediment were measured using Atomic Absorption Spectrophotometer (AAS) instrument. Enrichment factor (EF), geo-accumulation index (Igeo), contamination factor (CF), and pollution load index (PLI) were calculated for each sampling site to determine sediment quality. The results demonstrated that the average of Cu, Zn, Cd, Pb, As and Ni total in the surface sediments 15.13, 60.47, 6.62, 58.76, 4.58 and 36.34 mg/kg, respectively, and that higher values were mainly observed in the eastern portion of the sampling sites.The results indicated significant pollution of most sites by Cd (average EF 546.08), but there was also enrichment of Pb (average EF 59.84), and As (average EF 29.26). Based on Igeo, the western coast was categorized as extremely polluted by Cd, while in the eastern was categorized as moderately polluted. Cd and Pb in the western had highest CF. The pollution load index was suggested that North Sumatra was light polluted. Keywords: heavy metals, enrichment, contamination, North Sumatra

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LIST OF PARTICIPANT

JAPAN Hastuti, Amandangi Wahyuning Yamaguchi University amandangiw08@yahoo.com Fadli, Anis Farhana Binti Mohd Yamaguchi University anies911@yahoo.com Masaki, Yamamoto National Institute of Technology, Wakayama College masaki.wakayamanit@gmail.com Sulardi, Anom Tokyo University of Marine Science and Technology anomsulardi@gmail.com MALAYSIA Nurul Hazrina Idris University of Technology Malaysia

Omar bin Yaakob Universiti Teknologi Malaysia

INDONESIA ACEH Miftahuddin Syiah Kuala University miftah@unsyiah.ac.id Setiawan, Ichsan Syiah Kuala University ichsansetiawan@unsyiah.ac.id RIAU ISLANDS Apdillah, Dony Raja Ali Haji Maritime University mahess.loza@gmail.com

SOUTH SUMATERA Ningsih, Ellis Nurjuliasti Ningsih ellis_nurjuliasti@unsri.ac.id BANTEN Khalifa, Muta Ali University of Sultan Ageng Tirtayasa ma.khalifa@untirta.ac.id DKI JAKARTA Aisyah Center for Fisheries Research icha_saraimanette@yahoo.com Faizah, Ria Center for Fisheries Research faizah.ria@gmail.com Gusmawati, Niken Ministry of Marine Affairs and Fisheries of Indonesia niken.gusmawati@kkp.go.id Handayani, Tri Research Center for Oceanography, Indonesian Institute of Science umuamel@gmail.com Indriasari, Vivi Ministry of Marine Affairs and Fisheries Republic of Indonesia vivi_yovita@kkp.go.id Larasati, Tri National Nuclear Energy Agency tretno@batan.go.id Mahubessy, Reynold School of Meteorology Climatology and Geophysics reynoldmahubessy@gmail.com Makmur, Murdahayu National Nuclear Energy Agency mdhayu@batan.go.id

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Mira Ministry of Marine Affairs and Fisheries Republic of Indonesia miraclenia@yahoo.com Murniasih, Tutik Research Center for Oceanography, Indonesian Institute of Science tutikmurniasih71@gmail.com Prihatiningsih, Wahyu Center for Technology of Radiation Safety and Metrology - National Nuclear Energy Agency (PTKMR - BATAN) ayu-iu@batan.go.id Pujiastuti, Tyas tyas.pujiastuti@bmkg.go.id Sidabutar, Tumpak Research Center for Oceanography, Indonesian Institute of Science tumpaksid@gmailcom Sitompul, Johannes CV. Aksa Jaladhi Angkasatama johannesriter@gmail.com Sulaiman, Albert Geostech Laboratory, Agency for the Assessment and Application of Technology albertus.sulaiman@bppt.go.id Wulandari, Ita Research Center for Oceanography, Indonesian Institute of Science itawulandari@hotmail.com WEST JAVA Almatin, Agits Agnia Fidzly IPB University agits.agnia@gmail.com Apriansyah IPB University atmadipoera_itk@ipb.ac.id Arafat, Dondy IPB University

Arafat.dondy@Gmail.com Arhatin, Risti Endriani IPB University ristyend@yahoo.com Atmadipoera, Agus Saleh IPB University atmadipoera_itk@ipb.ac.id Benita, Ivena IPB University naulita@apps.ipb.ac.id Cahyana, Gusti Bagus Putra IPB University bagusputracahyana08@gmail.com Cakasana, Nadya IPB University nadyacaka@apps.ipb.ac.id Dewi, Atika Kumala IPB University atikakumaladewi@gmail.com Dheanisa, Maulia Rizky Indonesia University Mauliarizkyd@gmail.com Elson, La IPB University laelsonocean@gmail.com Erryansyah, Maychel IPB University maychelerryansyah@gmail.com Gaol, Jonson Lumban IPB University jonson_lumbangaol@yahoo.com Gumilang, Andi Perdana Universitas 17 Agustus 1945 Cirebon andiperdanag@gmail.com Hernawan, Undang Geological Survey Centre of the Ministry of Energy and Mineral Resources

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uhernawan@gmail.com Hestirianoto, Totok IPB University hestirianoto@gmail.com Hisyam, Muhammad IPB University hisyamheisyam@gmail.com Idris IPB University idris@terangi.or.id Ilyas, Turissa Pragunanti IPB University turissapragunanti05@gmail.com Izmiyaqin IPB University izmiyaqin@gmail.com Jaya, Indra IPB University indrajaya@apps.ipb.ac.id Jayenti, Elka Dwi IPB University elkadwijayenti@gmail.com Kore, Dominggus Samuel Helberth Lothar Matheus IPB University koreriawak@gmail.com Maharani, Adinda Padjadjaran University adinda0106@gmail.com Manik, Henry M IPB University henrymanik@ipb.ac.id Muliawan, Rizky Eko IPB University rizkyekomuliawan@gmail.com Mulyana, Mayrani Tika IPB University

mayrani_tika@apps.ipb.ac.id Mutiara IPB University tiarahanun7@gmail.com Nainggolan, Tumpal B Marine Geological Institute tumpal.bernhard@esdm.go.id Natih, Nyoman Metta N IPB University natih@apps.ipb.ac.id Naulita, Yuli IPB University naulita@apps.ipb.ac.id Nugroho, Chaidar Aji IPB University chaidaraji@gmail.com Nurholis IPB Univeristy kholiserl@gmail.com Nurulludin Indonesia University nurulludin.kkp@gmail.com Permana, Rizki Dimas IPB University rizki_permana@apps.ipb.ac.id Pujiyati, Sri IPB University sripujiyati@yahoo.com Purnama, Muhamad Nur Indonesia University mnurpurnama@gmail.com Rachman, Herlambang Aulia IPB University herlambangauliarachman@gmail.com Rahma, Aulia IPB University auliaarr29@gmail.com

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Rastina IPB University rastina049@apps.ipb.ac.id Ratnasari, Yulianti IPB University yuliantiratnasari37@gmail.com Riani, Etty IPB University etty_riani_harsono@yahoo.com Rizki, Dedek Rahmad Dwi IPB University mahess.loza@gmail.com Saenuddin IPB University saenuddin80@gmail.com Safitri, Destiana IPB University destiana06safitrii@gmail.com Saputra, Julian IPB University julian.saputra75@gmail.com Sinurat, Maya Eria Br IPB University maya_eriabrsinurat@apps.ipb.ac.id Subhan, Beginer IPB University beginersubhan@apps.ipb.ac.id Suryaningrum, Lusi Herawati Research Institute for Freshwater Aquaculture and Fisheries Extension lusihera@yahoo.co.id Susiani, Iis IPB University iissusianii07@gmail.com Talahatu, Marselius F Indonesia University marsel264@yahoo.co.uk

Vidura, Ahmad IPB University ahmadvidura@gmail.com Yusup, Insan Maulana IPB University insanmaulanayusup52@gmail.com Yuza, Naufal H IPB University naufalhamdani80@gmail.com Zuraida, Rina Center for Geological Survey, Geological Agency rinazuraida@yahoo.com CENTRAL JAVA Farahdita, Wanda Laras Diponegoro University wl.farahdita@gmail.com Kurniawan, Nur Arif Diponegoro University knurkurniawan@gmail.com Siagian, Hendry Diponegoro University henryropinus@gmail.com DAERAH ISTIMEWA YOGYAKARTA Hananya, Ariel Faculty of Biology, Universitas Gadjah Mada ariel.hananya@mail.ugm.ac.id EAST JAVA Junita, Dynda Romika Brawijaya University Dyndaromika@gmail.com Zubaida, Vina Brawijaya University Vinazubaida18@gmail.com BALI Astiti, Sagung Putri Chandra Udayana University

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sagungchandra17@gmail.com Siwi, Wingking Era Rintaka Institute for Marine Research and Observation, Ministry of Marine Affairs and Fisheries era09.bpol@gmail.com Tito, Camellia K Institute for Marine Research and Observation, Ministry of Marine Affairs and Fisheries camellia.tito@gmail.com NORTH SUAWESI Paruntu, Carolus Paulus Sam Ratulangi University

carolusparuntu@yahoo.com SOUTH-EAST SULAWESI Asmadin Halu Oleo University asmadin234@gmail.com SOUTH SULAWESI Marzuki, Ismail Fajar University ismailmz3773@gmail.com WEST PAPUA Sala, Ridwan Papua University ridwansala@gmail.com

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INDEX

210Po, 30 abration, 41 accretion, 41 Adi Winarto, 26 Adinda Naharani, 29 Agustun Sumartono, 27 aliphatic hudrocarbons, 28 Ampou, 38 Antara, 40 Arafat, 35 area affected, 37 Asmeati, 28 baseline assessment, 30 Batbitim, 33 Bengen, 36 Bintan Island, 32 biodegradation, 28 biota, 30 Cakasana, 35 Cimanuk Delta, 31 coral reef, 38 Dasmasela, 33 Daud Orisu, 33 decomposition, 36 Dede Falahudin, 32 Dedi Parenden, 33 degree of contmination, 31 Deny Yogaswara, 32 Dheanisa, 34 diagnostic ratio, 32 distribution season, 29 Dwi Masaoly, 33 earthquakes, 38 ecological status, 33 Edwar, 32 environment problem, 29 Erniati, 28 erosion, 42 Etty Riani, 26 Farahdita, 37 Gusnawati, 42 Handayani, 34 heavy metals, 31 high waves, 39 Iqbal, 39 Irwan Paserangi, 28 Islamy, 38 Ismail Marzuki, 28 Ita Wulandari, 32 Jakarta bay, 30 Junianto, 32

Khozanah Munawir, 32 Kristianto, 39 Kusumaningrum, 41 landsat, 34 landuse, 42 Lintang Permata, 29 litter, 36 Maduppa, 35 Mahendra, 39 Mahunessy, 39 mangrove, 34, 35, 36 marine conservation area, 33 marine debris, 29 Mega Laksmini, 29 microsymbiont, 28 Misol, 33 Muawanah Tajri, 27 Muhammad Chaerul, 28 Muliawan, 36 Murdahayu Makmur, 30 Natih, 41 NDVI, 35 Nugroho, 42 Nur Yahya, 30 Nusa Penida, 38 nutriens, 36 oil sludge, 28 organic matter, 36 Osawa, 40 PAHs, 32 Pandeglang, 37 Pangandaran, 42 Pasaribu, 35, 41 pollutants, 26 Prartono, 36 Prihatiningsih, 30 production, 34 productivity, 36 Pujianiki, 40 Purnomo Rahardjo, 31 radiological safety, 30 Rahatiningtyas, 34 Raja Ampat, 33 Ramadhona Saville, 26 RBA, 27 red tide, 27 remote sensing, 42 Ridwan Sala, 33 Rina Zuraida, 31 Ringgung, 26 risk quitient, 32

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Riza Rahardiawan, 31 Rudyansyah, 29 sandfish, 26 Sangadji, 35, 41 satellite image, 35 Savana, 35 saxitatoxin, 27 sea sponges, 28 sediment, 26, 32 Sentinel 2.0, 37 Sentinel 2A, 40 shellfish, 27 shoreline, 41 Shoreline, 42 shoreline change, 40 shrimps, 34 Siagian, 37 small island, 29 small islands, 35

Subhan, 35 SVM, 40 target fish, 33 Tarigan, 33 Temaja, 40 Tito, 38 Tri Retno, 27 tropical syslone, 39 tsunami Sunda Strait, 37 Tun Tedja, 26 Ulfah Lutfiani, 32 unsustainable, 26 Untung jawa, 35 Untung Sugiharto, 27 water, 26 winds, 39 Yeni Mulyani, 32 Zahida, 32

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