Navegando por Assunto "Eretmochelys imbricata"
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- TARTARUGAS-DE-PENTE (Eretmochelys imbricata) NO LITORAL SUL DO RIO GRANDE DO NORTE: OITO ANOS DE MONITORAMENTO(2012) SANTOS, A. J. B.; BELLINI, C.; VIEIRA, D. H. G.; NETO, L. D.; CORSO, G.A tartaruga-de-pente Eretmochelys imbricata, classificada como criticamente ameaçada em níveis nacional e internacional, apresenta maiores concentrações de ninhos nos litorais norte da Bahia e sul do Rio Grande do Norte. A detecção de tendências em populações de tartarugas marinhas requer longos períodos de coleta de dados, sendo as praias de desova muito importantes devido à dificuldade de acessar os animais no ambiente marinho. Apesar de levantamentos pontuais terem ocorrido no RN desde 1991, a estabilização das técnicas para coleta de dados se deu a partir de 2003. Apresentamos neste resumo dados obtidos de setembro de 2003 a julho de 2011 no litoral sul do Rio Grande do Norte.
Item Using data from nesting beach monitoring and satellite telemetry to improve estimates of marine turtle clutch frequency and population abundance(Marine Biology, 2021) Santos, Armando J. B. et al.Population abundance data are often used to defne species’ conservation status. Abundance of marine turtles is typically estimated using nesting beach monitoring data such as nest counts and clutch frequency (CF, i.e., the number of nests female turtles lay within a nesting season). However, studies have shown that CF determined solely from nesting beach monitoring data can be underestimated, leading to inaccurate abundance estimates. To obtain reliable estimates of CF for hawksbill turtles in northeastern Brazil (6.273356° S, 35.036271° W), the region with the highest nesting density in the South Atlantic, data from beach monitoring and satellite telemetry were combined from 2014 to 2019. Beach monitoring data indicated the date of frst nesting event, while state-space modeling of satellite telemetry data indicated the departure date of turtles, allowing calculations of residence length at breeding site and CF estimates based on internesting intervals. Females were estimated to nest up to six times within the nesting season with CF estimates between 4.5 and 4.8 clutches per female. CF estimates were used to determine the number of nesting females at the study site based in two approaches: considering and not considering transient turtles. Our approach and fndings highlight that transients heavily infuence CF estimates and need for reconsideration of how this key parameter is commonly determined for marine turtle populations and the use of beach monitoring data and satellite telemetry for estimations of CF.Item What can we learn from sea turtle strandings?(2016) GOLDBERG, D.W.; PIRES, T.; VELLOSO, R.; BECKER, H.; CASTILHOS, J.C.; WANDERLINDE, J.; LOPEZ, G.G.; MELO, M.T.D.; SANTOS, A.B.; BAPTISTOTTE, C.Stranding datasets may provide important information on sea turtle health, age, size composition, diet, reproductive status, population trends and cause-specific mortality. Additionally, they are also used to infer geographic distribution and abundance or even trends in mortality risk, attributable to anthropogenic threats such as coastal fisheries and pollution. Five species of sea turtle were recorded in 5260 strandings from January 2014 to September 2015, along the Brazilian coast, of which 3903 were Chelonia mydas, 914 were Lepidochelys olivacea, 290 were Caretta caretta, 83 were Eretmochelys imbricata, 4 were Dermochelys coriacea and 66 could not be identified.