TAMAR
URI permanente desta comunidadehttps://bdc.icmbio.gov.br/handle/cecav/1402
Centro Nacional de Pesquisa e Conservação de Tartarugas Marinhas e da Biodiversidade Marinha do Leste
Navegar
3 resultados
Resultados da Pesquisa
Item Green turtle (Chelonia mydas) nesting on Atol das Rocas, north-eastern Brazil, 1990–2008(2012-04-25) Bellini, C.; Santos, A.J.B; Grossman, A.; Barata, P.C.R.; Marcovaldi, M.A.In this paper, information is presented on green turtle (Chelonia mydas) nesting on Atol das Rocas (Rocas Atoll), north eastern Brazil. The temporal distribution of nesting events per season, annual number of nests, carapace length of nesting females, clutch size, hatching success, incubation period, internesting interval, clutch frequency, observed reproductive life span, and remigration period are reported. The study period included the nesting seasons from 1990 to 2008, but no regular beach monitoring was carried out in 1998 and 1999. Two sorts of methods were applied to the estimation of the annual number of nests in some seasons. Taking into account the estimated annual numbers of nests, the mean annual number of nests in the study period, excluding 1998–1999, was 335 (standard deviation ¼ 139, range ¼ 136–563, N ¼ 17). An analysis of the available data indicates that the average nesting levels at the beginning of the study period (the first five seasons) and at its end (the last five seasons) were roughly the same. The mean curved carapace length of the nesting turtles decreased significantly during the study period, from 115.9 cm in 1990–1992 to 112.9 cm in 2006 –2008. Atol das Rocas was established as a federal biological reserve in 1979, but regular sea turtle conservation activities actually started there in 1990. Since that year, the killing of nesting turtles has ceased, nesting activity by the turtles can proceed in an undisturbed fashion, and their clutches can incubate in a protected environment.Item Green Turtle Nesting on Trindade Island: Trend, Abundance and Biometrics(ENDANGERED SPECIES RESEARCH, 2011-08-31) ALMEIDA, A. P.; MOREIRA, L. M. P.; BRUNO, S. C.; THOMÉ, J .C. A.; MARTINS, A. S.; BOLTEN, A. B.; BJORDAL, K. A.ABSTRACT: Green turtles Chelonia mydas nesting at Trindade Island, 1140 km off the coast of Brazil, were monitored discontinuously from 1982/83 to 2008/09. For 7 years during this period, the majority of nesting was monitored, and the number of nests deposited on Trindade varied from 1333 to 5261. Based on these nest counts, Trindade is among the most important known Atlantic nesting sites for green turtles. The population remained stable between 1991 and 2008. Data on female body size, clutch size, internesting intervals, remigration intervals, and hatching success are also presented.Item Green Turtle Nesting on Trindade Island: Trend, Abundance and Biometrics(2011) Almeida, Antonio de Padua; Moreira, Luciana M. P.; Bruno, Soraya Christina; Thomé, João Carlos A.; Martins, Agnaldo S.; Bolten, Alan B.; Bjorndal, Karen A.Green turtles Chelonia mydas nesting at Trindade Island, 1140 km off the coast of Brazil, were monitored discontinuously from 1982/83 to 2008/09. For 7 years during this period, the majority of nesting was monitored, and the number of nests deposited on Trindade varied from 1333 to 5261. Based on these nest counts, Trindade is among the most important known Atlantic nesting sites for green turtles. The population remained stable between 1991 and 2008. Data on female body size, clutch size, internesting intervals, remigration intervals, and hatching success are also presented.