Dispersal and dive patterns in gravid leatherback turtles during the nesting season in French Guiana
| Autor: | Yasuhiko Naito, Sabrina Fossette, Sandra Ferraroli, Katsufumi Sato, Y. Le Maho, Nobuaki Arai, Hideji Tanaka, Jean-Yves Georges, Yan Ropert-Coudert |
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| Přispěvatelé: | Département Ecologie, Physiologie et Ethologie (DEPE-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Department of Social Informatics Graduate School of informatics, Kyoto University [Kyoto], National Insitute of Polar Research, National Institute of Polar Research [Tokyo] (NiPR), Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2007 |
| Předmět: |
0106 biological sciences
Satellite tracking media_common.quotation_subject Foraging Aquatic Science Dermochelys coriacea 010603 evolutionary biology 01 natural sciences Critically endangered Coastal zone 14. Life underwater Guiana's continental shelf Quantitative Biology - Populations and Evolution Nesting season Ecology Evolution Behavior and Systematics media_common Shore Benthic behaviour geography.geographical_feature_category Ecology Continental shelf [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] 010604 marine biology & hydrobiology Populations and Evolution (q-bio.PE) Diving behaviour Fishery Geography Oceanography FOS: Biological sciences Biological dispersal Reproduction |
| Zdroj: | Marine Ecology Progress Series Marine Ecology Progress Series, Inter Research, 2007, 338, pp.233-247 HAL |
| ISSN: | 1616-1599 0171-8630 |
| Popis: | We present the first combined analysis of diving behaviour and dispersal data collected from gravid leatherback turtles during 3 consecutive nesting seasons in French Guiana. In total, 23 turtles were fitted with Argos satellite transmitters and 16 individuals (including 6 that were concur- rently satellite-tracked) were equipped with an electronic time-depth recorder for single inter- nesting intervals, i.e. between 2 consecutive ovi-positions. The leatherbacks dispersed over the con- tinental shelf—from the coastal zone to the shelf break—and moved over 546.2 ± 154.1 km (mean ± SD) in waters of French Guiana and neighbouring Suriname. They mostly performed shallow (9.4 ± 9.2 m) and short (4.4 ± 3.4 min) dives with a slight diurnal pattern. They dived deeper as they moved away from the coast, suggesting that they were predominantly following the seabed. Inter-nesting intervals could be divided into 2 phases: the first comprised 75% of the time turtles spent at sea, dur- ing which they dived on average 47 min h -1 , while the second was characterised by lower and more variable diving effort as the turtles returned to shore. The extended movements of leatherbacks and the fine analysis of dive shapes suggest that, in French Guiana, leatherbacks may feed during the inter-nesting interval, probably to compensate for the energy costs associated with reproduction. Consequently, this critically endangered species is exposed to a high risk of interaction with local fisheries over the continental shelf. |
| Databáze: | OpenAIRE |
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