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WIDECAST AGM March 2018 – Matura, TrindadBelize Country Coordinator
Linda Searle
Using Satellite Telemetry to
Identify Foraging Grounds
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Developing a WIDECAST
Satellite Telemetry Database
WIDECAST AGM March 2018 – Maturo, TrindadBelize Country Coordinator
Linda Searle
identify Foraging Grounds
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OVERVIEW
• Background
• Pros & Cons
• Mapping Methods
• Attributes
• Data Sharing
• Benefits
• Next steps
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BACKGROUND
• Fish markets surveyed 2000-2001
• Measured & identified turtles harvested
• Fishermen reported area where there were a lot of turtles = Robinson Point
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ROBINSON POINT
Zenit – 2000
• 1st green turtle sat tracked to Belize
• 5 weeks migration from nesting beach in Costa Rica to foraging ground in Belize at Robinson Point
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and patch reefs
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ROBINSONPOINT
2009
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2011
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Quick Summary
• 2009 – 3 turtles tracked to Robinson Point• 2011 – 7 turtle tracked to Belize• 2017 - 42 turtles tracked to/from Belize by 14 different
organizations, from 7 different countries– Honduras– Mexico– Cayman– Jamaica– Costa Rica– Nicaragua– Barbados
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0
5
10
15
20
25
30
35
green hawksbill loggerhead olive ridley
Species Tagged
0
5
10
15
20
25
30
35
nest inwater rehab
Source of Turtles Tagged
0
5
10
15
20
25
30
35
40
juvenile sub adult adult
Life Stage
Bacalr Chico MR4%
Robinson Point21%
South Water Caye MR
7%
Laughing Bird Caye MR
7%Sapodilla Cayes
MR3%
Port Honduras MR31%
Mexico10%
Honduras17%
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Hawksbill
Moochula 2013
• Nests at Gales Point
• Forage in Honduras
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Hawksbill
Carenato 2015
• Nests at Gales Point
• Forages near Port Honduras
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Hawksbill
Tide of Hope 2014• Hawksbill turtle nests
on the Port Honduras Marine Reserve
• Forages in Honduras
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Hawksbill
Tide of Hope II 2015• Nests in Port
Honduras Marine Reserve
• Forages in Robinson Point
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LOGGERHEAD
110815 2011
• Juvenile loggerhead
• Inwater capture at Punta Allen, Mexico
• Migrated to Belize
• 2 years 12 days
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LOGGERHEAD
Hope 4 Freya 2015
• Loggerhead attacked by shark
• Immediate veterinary care
• Released w/in one week
• Tracked for almost 2 years and showed returning
• Longest of the HHMU tags
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LON
GES
T M
IGR
ATI
ON
GREEN
Turtle Sam 2014
• Subadult green forage in Glovers
• Travelled to Columbia
• Last transmission Nicaragua
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Green- Esperanza 2014
• Tour de Turtles
• Nests in Costa Rica
• Forages in Belize near Colson Point (Gales Point area) in the Victoria Channel
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Green– Reefie 2017
• Tour de Turtles
• Green turtle nests in Costa Rica
• Forages at Robinson Point
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Potential Issues?
PROS
• Foraging grounds identified
• If outside MPA maybe protection can be afforded
• Further studies on habitat
CONS
• Fishermen learn of the foraging grounds
• Tourist visit and start feeding
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2000-2013
Foraging Areas
Inside Main Barrier Reef
Outside MPA boundaries
• Bacalar Chico
• Robinson Point
• Near Port Honduras Marine Reserve
• Near Laughing Bird Caye
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Mapping Methods
• Arc GIS/ESRI
• Seaturtle.org Data Explorer
• Movebank (Max Planck Institute for Ornithology)
• Google Maps - Leaflet
• Google Earth Engine
• Others…?
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Ideal Attributes
• Vectors vs points
• Select paths to display
– country, species, year, age class, nesting, inwater, rehab, etc…
• Easy to upload
• Easy to share
– With communities
– Embed on websites
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MARINETRAFFIC.COM
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ESRI COAST.NOAA.GOV
• Hurricane selection nhc?
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ESRI COAST.NOAA.GOV
• Hurricane selection nhc?
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Movebank.org
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Google Maps
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BENEFITS
• Identify foraging grounds
• Identify migration paths
• Comprehensive database compiling all WIDECAST member tracks
• Alert when turtles approach your country
• Better management
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NEXT STEPS
ACTIVITY1. Identify interested members2. Identify best map method
– GIS/ESRI– Google product– Other ?
3. Prepare & Adopt Data Sharing Agreement– Belize Coral Reef & Sea Turtle Conservation
Networks
4. Identify Data Manager5. Compile data - CSV files6. Provide embed codes for partners to
share on their websites and WIDECAST website
TIMELINE ?
APR 2018
SEP 2018
FEB 2019
FEB 2019
MAY 2019
SEP 2019
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Thanks to
Michael Coyne (seaturtle.org) Daniel
Evans (Sea Turtle
Conservancy) Eduardo Cuevas (Mexico)
Barbara Schroeder (NOAA)
Julia Horrocks (UWI) Stephen Dunbar
(Protector)Janice Blumenthal (Cayman Islands)
for sharing the tracks of turtles to Belize!