Intra-species variability in migratory movement of hawksbill turtles in the southwest Indian Ocean
Implementing effective conservation measures to manage migratory populations is challenging, especially in a relatively inaccessible dynamic environment such as the ocean. With limited financial and human resources, efforts must be intelligently prioritized to achieve conservation success and reduce...
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Inter-Research Science Center
2024
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Online Access: | https://archimer.ifremer.fr/doc/00882/99388/109406.pdf https://doi.org/10.3354/esr01309 https://archimer.ifremer.fr/doc/00882/99388/ |
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ftarchimer:oai:archimer.ifremer.fr:99388 2024-06-23T07:45:54+00:00 Intra-species variability in migratory movement of hawksbill turtles in the southwest Indian Ocean Nivière, Manon Dalleau, Mayeul Bourjea, Jerome Jean, Claire Ciccione, Stéphane Mortimer, Jeanna A. Didon, Vanessa Rowat, David Rocamora, Gérard Ranaivoson, Ravaka Mahafina, Jamal Randriamiharisoa, Lalatiana Odile Barichasse, Eliott Bousquet, Olivier Barat, Anne Laforge, Antoine Ballorain, Katia 2024-01 application/pdf https://archimer.ifremer.fr/doc/00882/99388/109406.pdf https://doi.org/10.3354/esr01309 https://archimer.ifremer.fr/doc/00882/99388/ eng eng Inter-Research Science Center https://archimer.ifremer.fr/doc/00882/99388/109406.pdf doi:10.3354/esr01309 https://archimer.ifremer.fr/doc/00882/99388/ info:eu-repo/semantics/openAccess restricted use Endangered Species Research (1863-5407) (Inter-Research Science Center), 2024-01 , Vol. 53 , P. 379-393 Eretmochelys imbricata Movement persistence Migration Foraging habitat Southwest Indian Ocean text Article info:eu-repo/semantics/article 2024 ftarchimer https://doi.org/10.3354/esr01309 2024-06-04T23:55:59Z Implementing effective conservation measures to manage migratory populations is challenging, especially in a relatively inaccessible dynamic environment such as the ocean. With limited financial and human resources, efforts must be intelligently prioritized to achieve conservation success and reduce uncertainties of conservation efforts. The southwest Indian Ocean (SWIO) hosts some of the world’s most important breeding grounds for the Critically Endangered hawksbill turtle Eretmochelys imbricata. However, knowledge gaps remain about the movement patterns of this species. Between 2007 and 2022, we deployed 17 satellite tags onto hawksbill turtles from scattered locations in the SWIO: 16 nesting females—Granitic Islands, Seychelles (n = 9); north Madagascar (n = 5); Moheli, Comoros (n = 1); Juan de Nova, Terres australes et antarctiques françaises (n = 1)—and 1 female bycaught in fisheries (east Madagascar). We found strong variability in migratory movements amongst individuals, particularly in terms of distance and movement persistence. Detailed analysis of movement persistence reveals that these individuals behave differently in neritic and oceanic habitats, with a lower movement persistence in neritic habitats. We identified a total of 12 foraging areas scattered throughout the SWIO, both in coastal and open-sea neritic habitats. These results reinforce the need to consider the importance of neritic habitats, for both migration and foraging, in conservation policies. The quantification of the degree of migratory variability is particularly important to developing conservation plans and strategies at both the national and international level, including the delineation of regional management units (RMUs) in the Indian Ocean. Article in Journal/Newspaper Antarc* Antarctique* Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Indian Endangered Species Research 53 379 393 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Eretmochelys imbricata Movement persistence Migration Foraging habitat Southwest Indian Ocean |
spellingShingle |
Eretmochelys imbricata Movement persistence Migration Foraging habitat Southwest Indian Ocean Nivière, Manon Dalleau, Mayeul Bourjea, Jerome Jean, Claire Ciccione, Stéphane Mortimer, Jeanna A. Didon, Vanessa Rowat, David Rocamora, Gérard Ranaivoson, Ravaka Mahafina, Jamal Randriamiharisoa, Lalatiana Odile Barichasse, Eliott Bousquet, Olivier Barat, Anne Laforge, Antoine Ballorain, Katia Intra-species variability in migratory movement of hawksbill turtles in the southwest Indian Ocean |
topic_facet |
Eretmochelys imbricata Movement persistence Migration Foraging habitat Southwest Indian Ocean |
description |
Implementing effective conservation measures to manage migratory populations is challenging, especially in a relatively inaccessible dynamic environment such as the ocean. With limited financial and human resources, efforts must be intelligently prioritized to achieve conservation success and reduce uncertainties of conservation efforts. The southwest Indian Ocean (SWIO) hosts some of the world’s most important breeding grounds for the Critically Endangered hawksbill turtle Eretmochelys imbricata. However, knowledge gaps remain about the movement patterns of this species. Between 2007 and 2022, we deployed 17 satellite tags onto hawksbill turtles from scattered locations in the SWIO: 16 nesting females—Granitic Islands, Seychelles (n = 9); north Madagascar (n = 5); Moheli, Comoros (n = 1); Juan de Nova, Terres australes et antarctiques françaises (n = 1)—and 1 female bycaught in fisheries (east Madagascar). We found strong variability in migratory movements amongst individuals, particularly in terms of distance and movement persistence. Detailed analysis of movement persistence reveals that these individuals behave differently in neritic and oceanic habitats, with a lower movement persistence in neritic habitats. We identified a total of 12 foraging areas scattered throughout the SWIO, both in coastal and open-sea neritic habitats. These results reinforce the need to consider the importance of neritic habitats, for both migration and foraging, in conservation policies. The quantification of the degree of migratory variability is particularly important to developing conservation plans and strategies at both the national and international level, including the delineation of regional management units (RMUs) in the Indian Ocean. |
format |
Article in Journal/Newspaper |
author |
Nivière, Manon Dalleau, Mayeul Bourjea, Jerome Jean, Claire Ciccione, Stéphane Mortimer, Jeanna A. Didon, Vanessa Rowat, David Rocamora, Gérard Ranaivoson, Ravaka Mahafina, Jamal Randriamiharisoa, Lalatiana Odile Barichasse, Eliott Bousquet, Olivier Barat, Anne Laforge, Antoine Ballorain, Katia |
author_facet |
Nivière, Manon Dalleau, Mayeul Bourjea, Jerome Jean, Claire Ciccione, Stéphane Mortimer, Jeanna A. Didon, Vanessa Rowat, David Rocamora, Gérard Ranaivoson, Ravaka Mahafina, Jamal Randriamiharisoa, Lalatiana Odile Barichasse, Eliott Bousquet, Olivier Barat, Anne Laforge, Antoine Ballorain, Katia |
author_sort |
Nivière, Manon |
title |
Intra-species variability in migratory movement of hawksbill turtles in the southwest Indian Ocean |
title_short |
Intra-species variability in migratory movement of hawksbill turtles in the southwest Indian Ocean |
title_full |
Intra-species variability in migratory movement of hawksbill turtles in the southwest Indian Ocean |
title_fullStr |
Intra-species variability in migratory movement of hawksbill turtles in the southwest Indian Ocean |
title_full_unstemmed |
Intra-species variability in migratory movement of hawksbill turtles in the southwest Indian Ocean |
title_sort |
intra-species variability in migratory movement of hawksbill turtles in the southwest indian ocean |
publisher |
Inter-Research Science Center |
publishDate |
2024 |
url |
https://archimer.ifremer.fr/doc/00882/99388/109406.pdf https://doi.org/10.3354/esr01309 https://archimer.ifremer.fr/doc/00882/99388/ |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Antarc* Antarctique* |
genre_facet |
Antarc* Antarctique* |
op_source |
Endangered Species Research (1863-5407) (Inter-Research Science Center), 2024-01 , Vol. 53 , P. 379-393 |
op_relation |
https://archimer.ifremer.fr/doc/00882/99388/109406.pdf doi:10.3354/esr01309 https://archimer.ifremer.fr/doc/00882/99388/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.3354/esr01309 |
container_title |
Endangered Species Research |
container_volume |
53 |
container_start_page |
379 |
op_container_end_page |
393 |
_version_ |
1802642933300592640 |