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| Chambault, Philippine; Hattab, Tarek; Mouquet, Pascal; Bajjouk, Touria; Jean, Claire; Ballorain, Katia; Ciccione, Stéphane; Dalleau, Mayeul; Bourjea, Jerome. |
| Despite the large number of species distribution modelling (SDM) applications driven by tracking data, individual information is most of the time neglected and traditional SDM approaches commonly focus on predicting the potential distribution at the species or population‐level. By running classical SDMs (population approach) with mixed models including a random factor to account for the variability attributable to individual (individual approach), we propose an innovative five‐steps framework to predict the potential and individual‐level distributions of mobile species using GPS data collected from green turtles. Pseudo‐absences were randomly generated following an environmentally‐stratified procedure. A negative exponential dispersal kernel was... |
| Tipo: Text |
Palavras-chave: GPS tracking; Green turtles; Indian Ocean; Pseudo-absences; Shannon index; Spatial modelling. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00682/79412/81963.pdf |
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| Chambault, Philippine; De Thoisy, Benoît; Huguin, Maïlis; Martin, Jordan; Bonola, Marc; Etienne, Denis; Gresser, Julie; Hiélard, Gaëlle; Mailles, Julien; Védie, Fabien; Barnerias, Cyrille; Sutter, Emmanuel; Guillemot, Blandine; Dumont‐dayot, Émilie; Régis, Sidney; Lecerf, Nicolas; Lefebvre, Fabien; Frouin, Cédric; Aubert, Nathalie; Guimera, Christelle; Bordes, Robinson; Thieulle, Laurent; Duru, Matthieu; Bouaziz, Myriam; Pinson, Adrien; Flora, Frédéric; Queneherve, Patrick; Woignier, Thierry; Allenou, Jean-pierre; Cimiterra, Nicolas; Benhalilou, Abdelwahab; Murgale, Céline; Maillet, Thomas; Rangon, Luc; Chanteux, Noémie; Chanteur, Bénédicte; Béranger, Christelle; Le Maho, Yvon; Petit, Odile; Chevallier, Damien. |
| 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... |
| Tipo: Text |
Palavras-chave: Chelonia mydas; Developmental habitats; Immature green turtle; Migration routes; Mixed stock analysis. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00589/70079/68059.pdf |
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| Chambault, Philippine; Dalleau, Mayeul; Nicet, Jean-benoit; Mouquet, Pascal; Ballorain, Katia; Jean, Claire; Ciccione, Stéphane; Bourjea, Jerome. |
| Background A strong behavioural plasticity is commonly evidenced in the movements of marine megafauna species, and it might be related to an adaptation to local conditions of the habitat. One way to investigate such behavioural plasticity is to satellite track a large number of individuals from contrasting foraging grounds, but despite recent advances in satellite telemetry techniques, such studies are still very limited in sea turtles. Methods From 2010 to 2018, 49 juvenile green turtles were satellite tracked from five contrasting feeding grounds located in the South-West Indian Ocean in order to (1) assess the diel patterns in their movements, (2) investigate the inter-individual and inter-site variability, and (3) explore the drivers of their daily... |
| Tipo: Text |
Palavras-chave: Chelonia mydas; Home range; Satellite tracking; Diel pattern; Tidal cycle. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00601/71269/69659.pdf |
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| Bonola, Marc; Girondot, Marc; Robin, Jean-patrice; Martin, Jordan; Siegwalt, Flora; Jeantet, Lorène; Lelong, Pierre; Grand, Clément; Chambault, Philippine; Etienne, Denis; Gresser, Julie; Hielard, Gaëlle; Alexandre, Arqué; Régis, Sidney; Nicolas, Laurence; Frouin, Cédric; Lefebvre, Fabien; Sutter, Emmanuel; Vedie, Fabien; Barnerias, Cyrille; Laurent, Thieulle; Bordes, Robinson; Guimera, Christelle; Aubert, Nathalie; Bouaziz, Myriam; Pinson, Adrien; Frédéric, Flora; Matthieu, Duru; Benhalilou, Abdelwahab; Céline, Murgale; Maillet, Thomas; Andreani, Lucas; Campistron, Guilhem; Sikora, Maxym; Rateau, Fabian; Francis, George; Joffrey, Eggenspieler; Woignier, Thierry; Allenou, Jean-pierre; Louis-jean, Laurent; Chanteur, Bénédicte; Béranger, Christelle; Crillon, Jessica; Brador, Aude; Habold, Caroline; Le Maho, Yvon; Chevallier, Damien. |
| The change of animal biometrics (body mass and body size) can reveal important information about their living environment as well as determine the survival potential and reproductive success of individuals and thus the persistence of populations. However, weighing individuals like marine turtles in the field presents important logistical difficulties. In this context, estimating body mass based on body size is a crucial issue. Furthermore, the determinants of the variability of the parameters for this relationship can provide information about the quality of the environment and the manner in which individuals exploit the available resources. This is of particular importance in young individuals which growth quality might be a determinant of adult fitness.... |
| Tipo: Text |
Palavras-chave: Green turtles; Juveniles; Body mass; Body condition; Biometry. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00593/70493/68640.pdf |
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| Chambault, Philippine; Giraudou, Lucie; De Thoisy, Benoit; Bonola, Marc; Kelle, Laurent; Dos Reis, Virginie; Blanchard, Fabian; Le Maho, Yvon; Chevallier, Damien. |
| The identification of the inter-nesting habitat used by gravid sea turtles has become a crucial factor in their protection. Their aggregation in large groups of individuals during the inter-nesting period exposes them to increased threats to their survival - particularly along the French Guiana shield, where intense legal and illegal fisheries occur. Among the three sea turtle species nesting in French Guiana, the olive ridley appears to have the most generalist diet, showing strong behavioural plasticity according to the environment encountered. The large amounts of sediments that are continuously discharged by the Amazon River create a very unusual habitat for olive ridleys, i.e. turbid waters with low salinity. This study assesses the behavioural... |
| Tipo: Text |
Palavras-chave: Lepidochelys olivacea; Equatorial Atlantic; Inter-nesting season; Behavioural synchrony; Amazon River. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00354/46507/46269.pdf |
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