south west indian ocean fishery project ( swiofp ) component 5 mainstreaming biodiversity
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South West Indian Ocean Fishery Project ( SWIOFP ) Component 5 Mainstreaming biodiversity Maurice 4 – 7 August 2009 French Activity proposed to the 8 others countries of the SWIOFP. - PowerPoint PPT PresentationTRANSCRIPT
South West Indian Ocean Fishery Project (SWIOFP)
Component 5Mainstreaming biodiversity
Maurice 4 – 7 August 2009
French Activityproposed to the 8 others countries of the SWIOFP
Movement of sea turtle between nesting sites and feeding grounds in the South West Indian Ocean: regional migratory knowledge and
interaction with open sea fisheries for management issues
Jérôme BOURJEAIFREMERLA REUNION FRANCE
South West Indian Ocean Fishery ProjectSWIOFP - Update
SWIOFP C5 Mauritius 4 – 7 August 2009
- Funded by GEF-World Bank & FFEM (France)
- Negotiation to implement this project started in 2000
- Composed of 6 components: 1 : Data Gap Analysis, Data Archiving and Information Technology. 2: Assessment and sustainable utilization of crustaceans 3: Assessment and sustainable utilization of demersal fishes 4: Assessment and sustainable utilization of pelagic fish 5: Mainstreaming biodiversity in national and regional fisheries management 6: Strengthening regional and national fisheries management.
- Members : South Africa, Mozambique, Tanzania, Kenya, ComorosSeychelles, Madagascar, Mauritius and La Réunion (France)
- SWIOFP officially started in July 2008
French activity of the component 5
related to Sea Turtle interactions with open sea fisheries and Regional management
Movement of sea turtle between nesting sites and feeding grounds in the South West Indian Ocean:
regional migratory knowledge and interaction with open sea fisheries for management issues
Regional coordinator of the component 5 : Mauritius
The component 5: mainstreaming biodiversity
SWIOFP C5 Mauritius 4 – 7 August 2009
State of the art of sea turtles status in the SWIO
SWIOFP C5 Mauritius 4 – 7 August 2009
Leatherback Status : Critically endangered
Nesting site: South Africa
Feeding ground: Open sea
Loggerhead Status : Endangered
Nesting site: South Africa Feeding ground: Open sea
Olive Ridley Status : Vulnerable
Nesting site : North IO
Feeding ground: Open sea
Hawksbill Status : Critically endangered
Nesting site: Equatorial SWIO
Feeding ground: costal SWIO
Green Status : Endangered
Nesting site: all SWIO
Feeding ground: costal SWIO
State of the art of sea turtles status in the SWIOEx: Green turtle nesting sites
SWIOFP C5 Mauritius 4 – 7 August 2009
> 10 000
< 50
Female per year
SWIOFP C5 Mauritius 4 – 7 August 2009
State of the art of sea turtles status in the SWIOEx: Green turtle feeding grounds
SWIOFP C5 Mauritius 4 – 7 August 2009
State of the art of sea turtles status in the SWIOEx: Green turtle migration pattern between nesting sites and sea
grass beds
Glorieuses
SWIOFP C5 Mauritius 4 – 7 August 2009
State of the art of sea turtles status in the SWIOEx: Green turtle genetic structure in the SWIO
2 distincts stocks (or more?)
Data available on open sea fishery activities in the SWIOLongliners – IOTC data
SWIOFP C5 Mauritius 4 – 7 August 2009
0
10
20
30
40
19
50
19
53
19
56
19
59
19
62
19
65
19
68
19
71
19
74
19
77
19
80
19
83
19
86
19
89
19
92
19
95
19
98
20
01
20
04
Th
ou
sa
nd
s
ton
ne
s
Other
NEI
Korea
Indonesia
Sri Lanka
EC-ELL
Japan
Taiwan
Ex: Catches of swordfish by fleet
Ex: October – November – December 5° Square effort (1000 hooks) for the Spanish, Taiwanese and Japanese longline fleet
SWIOFP C5 Mauritius 4 – 7 August 2009
Data available Open sea fisheries activity in the SWIOFrench Longliners – IFREMER data
Ex: 2007 5° Square effort (nb hooks) for the La Réunion longline fleet
SWIOFP C5 Mauritius 4 – 7 August 2009
Open sea fisheries activity in the SWIOOceanic Purse Seine – IOTC/IRD data
Ex up: 2007 1°effort (nb sets) for the french purse seine fleet
- 3 0
- 2 5
- 2 0
- 1 5
- 1 0
- 5
0
5
1 0
1 5
2 0
2 5
3 0
- 1 1 0- 1 0 5- 1 0 0- 9 5- 9 0- 8 5- 8 0- 7 5- 7 0- 6 5- 6 0- 5 5- 5 0- 4 5- 4 0- 3 5- 3 0
- 1 1 0- 1 0 5- 1 0 0- 9 5- 9 0- 8 5- 8 0- 7 5- 7 0- 6 5- 6 0- 5 5- 5 0- 4 5- 4 0- 3 5- 3 0
- 3 0
- 2 5
- 2 0
- 1 5
- 1 0
- 5
0
5
1 0
1 5
2 0
2 5
3 0
Efforts jmer ITPST110707 500EFF
- 3 0
- 2 5
- 2 0
- 1 5
- 1 0
- 5
0
5
1 0
1 5
2 0
2 5
3 0
- 1 1 0- 1 0 5- 1 0 0- 9 5- 9 0- 8 5- 8 0- 7 5- 7 0- 6 5- 6 0- 5 5- 5 0- 4 5- 4 0- 3 5- 3 0
- 1 1 0- 1 0 5- 1 0 0- 9 5- 9 0- 8 5- 8 0- 7 5- 7 0- 6 5- 6 0- 5 5- 5 0- 4 5- 4 0- 3 5- 3 0
- 3 0
- 2 5
- 2 0
- 1 5
- 1 0
- 5
0
5
1 0
1 5
2 0
2 5
3 0
Efforts jmer ITPST110206 500EFF
Ex up: 2002-2006 1°effort (nb sets) for the french purse seine fleet
SWIOFP C5 Mauritius 4 – 7 August 2009
Open sea fisheries interaction with sea turtles in the SWIOIOTC/IRD/IFREMER data
Ex: Purse seine by catch of sea turtle by species
0
0,002
0,004
0,006
0,008
0,01
0,012
1997 1998 1999 2000
CP
UE
(N
um
ber
/100
0 h
oo
ks)
Chelonia mydasEretmochelys imbricataDermochelys coriaceaCaretta caretta
0
0,002
0,004
0,006
0,008
0,01
0,012
1997 1998 1999 2000
CP
UE
(N
um
ber
/100
0 h
oo
ks)
Chelonia mydasEretmochelys imbricataDermochelys coriaceaCaretta caretta
Ex: French longline sea turtle by catches by species
SWIOFP C5 Mauritius 4 – 7 August 2009
Environment data available for the SWIOEx: SST
Ex: Monthly evolution of the Sea Surface temperature (SST) in the South West Indian Ocean for 2008
January February March April
September
May AugustJulyJune
DecemberNovemberOctober
Scientific aims of the project:
1/ Identification of sea turtle ‘Hotspots’ in the south west Indian Ocean and assessment of the main populations
based on existing data
2/ Regional migration routes of the sea turtles
3/ Understanding migration behaviour of the sea turtles according to Environmental conditions (currents, SST…)
and available genetic data (haplotypes frequencies and structure)
4/ Building a migratory map for those population in the WIO
SWIOFP Activity related to Sea Turtle interactions with open sea fisheries and Regional management
SWIOFP C5 Mauritius 4 – 7 August 2009
Application aims:
-To set up a classification of risk’s areas for the species,according to the interaction with the open sea fishing
activities (longline and pure seine)
-To propose local and regional mitigate measures of management for the sea turtles, according to
population abundance and migratory behaviour, which can be compatible with the local lasting
development, as the eco-tourism
- To contribute to the Marine Turtle Task Force (MTTF) in the creation of a reliable research and
application network dedicated to sea turtles,
SWIOFP Activity related to Sea Turtle interactions with open sea fisheries and Regional management
SWIOFP C5 Mauritius 4 – 7 August 2009
Mains gaps of the project
SWIOFP C5 Mauritius 4 – 7 August 2009
1/ Lack in a reliable assessment of the currents status of sea turtle in some countries of the SWIO (Nesting sitesabundance, feeding grounds…)
2/ Lack of knowledge origine of the turtle nesting in the other countries of the SWIO
3/ Few by-catch assessment available for some area
This project is an opportunity to fill in some of these gapsgathering all countries in a same regional project
HOW TO DO THAT PROJECT?
WPEB – IOTC Bangkok, 20-22 October 2008
1/ Based on the sea turtle biology, ecology and population assessment in all the SWOI = compilation of data available
2/ Based on Satellite tags deployed in nesting sites (Female)and at sea (immature/adult by-catch)
3/ Effort, catches and CPUE data of open sea fisheries(IOTC database on pure seine and longline 5°x5°)
4/ environmental and oceanic data (CLS, NOAA: SST, Currents, altimetry, chlorophyll)
5/ local knowledge on by-catch rate in open sea fisheries
SWIOFP C5 Mauritius 4 – 7 August 2009
HOW TO DO THAT PROJECT?
Maximum of satellite tracks+
Biological/abundance/repartition data/ species+
Oceanographic data +
Open sea fishing Data+
Known data on by catch in the area
Probabilistic model (in development by australia)
Risk map of interaction of open sea fisheries and sea turtles in the SWIO / Mozambique Channel
Application of the model in other areas
WPEB – IOTC Bangkok, 20-22 October 2008
HOW TO DO THAT PROJECT?
WPEB – IOTC Bangkok, 20-22 October 2008
WHERE?
POST NESTING
France
SWIOFP
WPEB – IOTC Bangkok, 20-22 October 2008
WHERE?
12 Post Nesting of green From Glorieuses, June 2008
WPEB – IOTC Bangkok, 20-22 October 2008
WHERE?
POST NESTING
France
SWIOFP
OPEN SEA STAGES
Longline release
Purse seine release?
WPEB – IOTC Bangkok, 20-22 October 2008
WHERE?
Release of a loggerhead By caught by a longliner, October 2008
Time Schedule
July 2008 : Start of SWIOFP/ Turtle project
Oct 2009
July 2011
July 2012
Gap analysis
Aug 2009 : SWIOFP workshop component 5
Field time
Data Analysis
SWIOFP Preparation of field tripTarget species identificationMaturity stageSites and number of PTT Collecting past tracks
French project
Field timeFixing PTTTrackingCollecting others data
Data analysisTesting the modelAdapting the modelValidating the model
SWIOFP C5 Mauritius 4 – 7 August 2009
TRAINING
THANK YOU
SWIOFP C5 Mauritius 4 – 7 August 2009
• Calculates the spatial distribution of turtle open sea effort and open sea fishing effort
• Overlap index creates a risk to capture in every 5° grid box
• Combination of overlap index with data on actual bycatch rates can be used to create an entire SWIO bycatch map.
• Based on spatial distribution of sea turtle open sea effort, the incidental mortalities can be attributed to individual populations and these data incorporated into a population viability analysis (PVA) if desired. This will determine the most at risk populations based on current levels of fishing and mortality
• tells us where best to direct mitigation strategies
WPEB – IOTC Bangkok, 20-22 October 2008
ANNEXE: SPATIAL MODEL OF INTERACTION