Intra-species variability in migratory movement of hawksbill turtles in the southwest Indian Ocean
International audience 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 conserva...
Published in: | Endangered Species Research |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal.science/hal-04606335 https://hal.science/hal-04606335v1/document https://hal.science/hal-04606335v1/file/n053p379.pdf https://doi.org/10.3354/esr01309 |
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ftinsu:oai:HAL:hal-04606335v1 2024-10-13T14:03:10+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 CEDTM - Centre d’Etude et de Découverte des Tortues Marines MARine Biodiversity Exploitation and Conservation - Station Ifremer Sète (UMR Marbec - Station Sète) MARine Biodiversity Exploitation and Conservation - MARBEC (UMR MARBEC) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM) Kélonia - Observatoire des tortues marines University of Florida Gainesville (UF) Laboratoire de l'Atmosphère et des Cyclones (LACy) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France 2024-01 https://hal.science/hal-04606335 https://hal.science/hal-04606335v1/document https://hal.science/hal-04606335v1/file/n053p379.pdf https://doi.org/10.3354/esr01309 en eng HAL CCSD Oldendorf/Luhe : Inter-Research info:eu-repo/semantics/altIdentifier/doi/10.3354/esr01309 doi:10.3354/esr01309 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1863-5407 EISSN: 1613-4796 Endangered Species Research https://hal.science/hal-04606335 Endangered Species Research, 2024, 53, pp.379-393. ⟨10.3354/esr01309⟩ [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2024 ftinsu https://doi.org/10.3354/esr01309 2024-10-03T00:30:45Z International audience 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* Institut national des sciences de l'Univers: HAL-INSU Indian Endangered Species Research 53 379 393 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDV]Life Sciences [q-bio] |
spellingShingle |
[SDV]Life Sciences [q-bio] 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 |
[SDV]Life Sciences [q-bio] |
description |
International audience 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. |
author2 |
CEDTM - Centre d’Etude et de Découverte des Tortues Marines MARine Biodiversity Exploitation and Conservation - Station Ifremer Sète (UMR Marbec - Station Sète) MARine Biodiversity Exploitation and Conservation - MARBEC (UMR MARBEC) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM) Kélonia - Observatoire des tortues marines University of Florida Gainesville (UF) Laboratoire de l'Atmosphère et des Cyclones (LACy) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France |
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 |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04606335 https://hal.science/hal-04606335v1/document https://hal.science/hal-04606335v1/file/n053p379.pdf https://doi.org/10.3354/esr01309 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Antarc* Antarctique* |
genre_facet |
Antarc* Antarctique* |
op_source |
ISSN: 1863-5407 EISSN: 1613-4796 Endangered Species Research https://hal.science/hal-04606335 Endangered Species Research, 2024, 53, pp.379-393. ⟨10.3354/esr01309⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/esr01309 doi:10.3354/esr01309 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
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_ |
1812819597305315328 |