Diapositive 1

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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
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 BOURJEA IFREMER LA REUNION FRANCE
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South West Indian Ocean Fishery Project SWIOFP -
Update

• 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, Comoros
• Seychelles, Madagascar, Mauritius and La Réunion
  (France)
• SWIOFP officially started in July 2008

SWIOFP C5 Mauritius 4 7 August 2009
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The component 5 mainstreaming biodiversity
Regional coordinator of the component 5
Mauritius
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
SWIOFP C5 Mauritius 4 7 August 2009
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State of the art of sea turtles status in the SWIO
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
SWIOFP C5 Mauritius 4 7 August 2009
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State of the art of sea turtles status in the
SWIO Ex Green turtle nesting sites
gt 10 000
lt 50
Female per year
SWIOFP C5 Mauritius 4 7 August 2009
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State of the art of sea turtles status in the
SWIO Ex Green turtle feeding grounds
SWIOFP C5 Mauritius 4 7 August 2009
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State of the art of sea turtles status in the
SWIO Ex Green turtle migration pattern between
nesting sites and sea grass beds
SWIOFP C5 Mauritius 4 7 August 2009
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State of the art of sea turtles status in the
SWIO Ex Green turtle genetic structure in the
SWIO
2 distincts stocks (or more?)
SWIOFP C5 Mauritius 4 7 August 2009
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Data available on open sea fishery activities in
the SWIO Longliners IOTC data
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
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Data available Open sea fisheries activity in the
SWIO French Longliners IFREMER data
Ex 2007 5 Square effort (nb hooks) for the La
Réunion longline fleet
SWIOFP C5 Mauritius 4 7 August 2009
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Open sea fisheries activity in the SWIO Oceanic
Purse Seine IOTC/IRD data
Ex up 2007 1effort (nb sets) for the french
purse seine fleet
Ex up 2002-2006 1effort (nb sets) for the
french purse seine fleet
SWIOFP C5 Mauritius 4 7 August 2009
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Open sea fisheries interaction with sea turtles
in the SWIO IOTC/IRD/IFREMER data
Ex Purse seine by catch of sea turtle by species
Ex French longline sea turtle by catches by
species
SWIOFP C5 Mauritius 4 7 August 2009
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Environment data available for the SWIO Ex SST
January
February
March
April
May
August
July
June
September
December
November
October
Ex Monthly evolution of the Sea Surface
temperature (SST) in the South West Indian Ocean
for 2008
SWIOFP C5 Mauritius 4 7 August 2009
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SWIOFP Activity related to Sea Turtle
interactions with open sea fisheries and Regional
management
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 C5 Mauritius 4 7 August 2009
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SWIOFP Activity related to Sea Turtle
interactions with open sea fisheries and Regional
management

• Application aims
• To set up a classification of risks 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 C5 Mauritius 4 7 August 2009
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Mains gaps of the project
1/ Lack in a reliable assessment of the currents
status of sea turtle in some countries of the
SWIO (Nesting sites abundance, 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 gaps gathering all countries in a same
regional project
SWIOFP C5 Mauritius 4 7 August 2009
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HOW TO DO THAT PROJECT?
WPEB IOTC Bangkok, 20-22 October 2008
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HOW TO DO THAT PROJECT?
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 5x5) 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
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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
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WHERE?
POST NESTING
France
SWIOFP
WPEB IOTC Bangkok, 20-22 October 2008
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WHERE?
12 Post Nesting of green From Glorieuses, June
2008
WPEB IOTC Bangkok, 20-22 October 2008
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WHERE?
POST NESTING
France
SWIOFP
OPEN SEA STAGES
Longline release
Purse seine release?
WPEB IOTC Bangkok, 20-22 October 2008
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WHERE?
Release of a loggerhead By caught by a
longliner, October 2008
WPEB IOTC Bangkok, 20-22 October 2008
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Time Schedule
July 2008 Start of SWIOFP/ Turtle project
French project
Preparation of field trip Target species
identification Maturity stage Sites and number of
PTT Collecting past tracks
Oct 2009
TRAINING
Field time Fixing PTT Tracking Collecting others
data
July 2011
Data analysis Testing the model Adapting the
model Validating the model
July 2012
SWIOFP C5 Mauritius 4 7 August 2009
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(No Transcript)
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THANK YOU
SWIOFP C5 Mauritius 4 7 August 2009
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ANNEXE SPATIAL MODEL OF INTERACTION

• 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