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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ftdoajarticles:oai:doaj.org/article:0e0029afac714948a7d6396b9e09010a 2024-09-15T17:48:20+00:00 Intra-species variability in migratory movement of hawksbill turtles in the southwest Indian Ocean M Nivière M Dalleau J Bourjea C Jean S Ciccione JA Mortimer V Didon D Rowat G Rocamora R Ranaivoson J Mahafina LO Randriamiharisoa E Barichasse O Bousquet A Barat A Laforge K Ballorain 2024-03-01T00:00:00Z https://doi.org/10.3354/esr01309 https://doaj.org/article/0e0029afac714948a7d6396b9e09010a EN eng Inter-Research https://www.int-res.com/abstracts/esr/v53/p379-393/ https://doaj.org/toc/1863-5407 https://doaj.org/toc/1613-4796 1863-5407 1613-4796 doi:10.3354/esr01309 https://doaj.org/article/0e0029afac714948a7d6396b9e09010a Endangered Species Research, Vol 53, Pp 379-393 (2024) Zoology QL1-991 Botany QK1-989 article 2024 ftdoajarticles https://doi.org/10.3354/esr01309 2024-08-05T17:49:38Z 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* Directory of Open Access Journals: DOAJ Articles Endangered Species Research 53 379 393 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Zoology QL1-991 Botany QK1-989 |
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Zoology QL1-991 Botany QK1-989 M Nivière M Dalleau J Bourjea C Jean S Ciccione JA Mortimer V Didon D Rowat G Rocamora R Ranaivoson J Mahafina LO Randriamiharisoa E Barichasse O Bousquet A Barat A Laforge K Ballorain Intra-species variability in migratory movement of hawksbill turtles in the southwest Indian Ocean |
topic_facet |
Zoology QL1-991 Botany QK1-989 |
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 |
M Nivière M Dalleau J Bourjea C Jean S Ciccione JA Mortimer V Didon D Rowat G Rocamora R Ranaivoson J Mahafina LO Randriamiharisoa E Barichasse O Bousquet A Barat A Laforge K Ballorain |
author_facet |
M Nivière M Dalleau J Bourjea C Jean S Ciccione JA Mortimer V Didon D Rowat G Rocamora R Ranaivoson J Mahafina LO Randriamiharisoa E Barichasse O Bousquet A Barat A Laforge K Ballorain |
author_sort |
M Nivière |
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 |
publishDate |
2024 |
url |
https://doi.org/10.3354/esr01309 https://doaj.org/article/0e0029afac714948a7d6396b9e09010a |
genre |
Antarc* Antarctique* |
genre_facet |
Antarc* Antarctique* |
op_source |
Endangered Species Research, Vol 53, Pp 379-393 (2024) |
op_relation |
https://www.int-res.com/abstracts/esr/v53/p379-393/ https://doaj.org/toc/1863-5407 https://doaj.org/toc/1613-4796 1863-5407 1613-4796 doi:10.3354/esr01309 https://doaj.org/article/0e0029afac714948a7d6396b9e09010a |
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_ |
1810289483762892800 |