| Autor: |
Chambault P; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., de Thoisy B; Association Kwata Cayenne Cedex France., Huguin M; Association Kwata Cayenne Cedex France., Martin J; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., Bonola M; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., Etienne D; DEAL Martinique, Pointe de Jaham Schoelcher Cedex France., Gresser J; DEAL Martinique, Pointe de Jaham Schoelcher Cedex France., Hiélard G; Office de l'Eau Martinique Fort-de-France France., Mailles J; DEAL Martinique, Pointe de Jaham Schoelcher Cedex France., Védie F; DEAL Martinique, Pointe de Jaham Schoelcher Cedex France., Barnerias C; DEAL Martinique, Pointe de Jaham Schoelcher Cedex France., Sutter E; DEAL Martinique, Pointe de Jaham Schoelcher Cedex France., Guillemot B; Section Boisbert Délégation Inter Régionale Outre-mer, Chemin de Boyer Lamentin France., Dumont-Dayot É; Section Boisbert Délégation Inter Régionale Outre-mer, Chemin de Boyer Lamentin France., Régis S; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., Lecerf N; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., Lefebvre F; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., Frouin C; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., Aubert N; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., Guimera C; Surfrider Foundation Europe Martinique France., Bordes R; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., Thieulle L; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., Duru M; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., Bouaziz M; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., Pinson A; Surfrider Foundation Europe Martinique France., Flora F; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., Queneherve P; IRD Martinique-Caraïbe Le Lamentin Cédex 2 France., Woignier T; IRD Martinique-Caraïbe Le Lamentin Cédex 2 France.; CNRS, IRD, IMBE Aix Marseille University, University Avignon Marseille France., Allenou JP; IFREMER Délégation de Martinique Le Robert France., Cimiterra N; IFREMER Délégation de Martinique Le Robert France., Benhalilou A; Association POEMM Les Trois Ilets France., Murgale C; Association POEMM Les Trois Ilets France., Maillet T; Association POEMM Les Trois Ilets France., Rangon L; IRD Martinique-Caraïbe Le Lamentin Cédex 2 France.; CNRS, IRD, IMBE Aix Marseille University, University Avignon Marseille France., Chanteux N; Surfrider Foundation Europe Martinique France., Chanteur B; PNR Martinique Fort-de-France France., Béranger C; PNR Martinique Fort-de-France France., Le Maho Y; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France., Petit O; CNRS Équipe d'Éthologie Cognitive et Sociale Strasbourg France., Chevallier D; CNRS-IPHC UMR 7178 Université de Strasbourg Strasbourg Cedex 2 France. |
| Abstrakt: |
Although it is commonly assumed that female sea turtles always return to the beach they hatched, the pathways they use during the years preceding their first reproduction and their natal origins are most often unknown, as it is the case for juvenile green turtles found in Martinique waters in the Caribbean. Given the oceanic circulation of the Guiana current flowing toward Martinique and the presence of important nesting sites for this species in Suriname and French Guiana, we may assume that a large proportion of the juvenile green turtles found in Martinique are originating from the Suriname-French Guiana beaches. To confirm this hypothesis, we performed mixed stock analysis (MSA) on 40 green turtles sampled in Martinique Island and satellite tracked 31 juvenile green turtles tagged in Martinique to (a) assess their natal origin and (b) identify their destination. Our results from MSA confirm that these juveniles are descendant from females laying on several Caribbean and Atlantic beaches, mostly from Suriname and French Guiana, but also from more southern Brazilian beaches. These results were confirmed by the tracking data as the 10 turtles leaving Martinique headed across the Caribbean-Atlantic region in six different directions and 50% of these turtles reached the Brazilian foraging grounds used by the adult green turtles coming from French Guiana. One turtle left the French Guianan coast to perform the first transatlantic migration ever recorded in juvenile green turtles, swimming toward Guinea-Bissau, which is the most important nesting site for green turtles along the African coast. The extensive movements of the migrant turtles evidenced the crossing of international waters and more than 25 exclusive economic zones, reinforcing the need for an international cooperative network to ensure the conservation of future breeders in this endangered species. |
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