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URI permanente para esta coleçãohttps://bdc.icmbio.gov.br/handle/cecav/1487
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6 resultados
Resultados da Pesquisa
- Establecimiento de escores para determinar el grado de severidad de la fibropapilomatosis en Chelonia mydas (Testudines, Cheloniidae) capturadas en la costa brasilera(2012) ROSSI, S; SÁNCHEZ-SARMIENTO, A.M; VANSTREEL, R.E.T; SANTOS, R.G; BAPTISTOTTE, C; LIMA, E.H.S.M; BECKER, J.H; MATUSHIMA, E.RLa fibropapilomatosis (FP) es una enfermedad que afecta tortugas marinas, en especial a la especie Chelonia mydas, siendo caracterizada por tumores cutáneos benignos. Es considerada una de las principales amenazas para su conservación junto a la captura por pesca y degradación del hábitat. Existe un consenso de que la FP tendría múltiples causas, incluyendo un agente viral, factores genéticos y ambientales. Fueron estudiados especímenes de C. mydas provenientes de UbatubaSP, Vitória-ES y Almofala-CE, áreas de alimentación en Brasil. Se registraron datos biométricos: Largo curvo del caparazón (cm), Ancho curvo del caparazón (cm) y Masa corporal (kg), tamaño y cantidad de tumores por región anatómica, conforme protocolo del Proyecto Tamar-ICMBio, clasificando los tumores por categorías: 1 (< 1 cm), 2 (1 cm ≤ tumor < 4 cm), 3 (4 cm ≤ tumor < 10 cm) y 4 (≥ 10 cm). El objetivo de este trabajo fue utilizar la cantidad de tumores por categoría para definir escores de gravedad de la enfermedad. Posteriormente esos escores serán correlacionados al índice de condición corporal (ICC), análisis de organoclorados y de función celular. La nueva propuesta, aún en desarrollo, contempla aplicación de modelaje estadístico utilizando estas categorías y la aplicación de una puntuación por categoría. Por ejemplo, categorías 1 y 2 llevarían menor puntuación por clasificar tumores más pequeños. Tal propuesta será utilizada para C. mydas de la costa brasilera, aplicándose mejor a esas poblaciones y los escores posibilitarán una mejor evaluación de la severidad de la FP (leve, moderada, grave, muy grave).
- Distribución anatómica de fibropapilomas en tortugas verdes, Chelonia mydas (Testudines, Cheloniidae), capturadas en la costa brasilera(2012) SÁNCHEZ-SARMIENTO, A.M; ROSSI, S; VANSTREEL, R.E.T; SANTOS, R.G; BAPTISTOTTE, C; BECKER, J.H; LIMA, E.H.S.M; MATUSHIMA, E.RLas tortugas marinas se encuentran mundial y regionalmente amenazadas de extinción. La tortuga verde, Chelonia mydas, está clasificada como “Amenazada” por la Unión Internacional para la Conservación de la Naturaleza y es listada como vulnerable de extinción por el Instituto Brasilero de Medio Ambiente y de los Recursos Naturales Renovables. Las amenazas para la especie incluyen captura por pesca, degradación del hábitat en las áreas de alimentación y anidación, polución marina y enfermedades. Una de las principales amenazas para la conservación de esta especie es la fibropapilomatosis, Green turtle fibropapilloma disease, una enfermedad tumoral que se destaca por su carácter multifactorial, amplia distribución e impacto. Se caracterizaron los fibropapilomas de 88 individuos provenientes de Almofala-CE (n=4), Ubatuba-SP (n=61) y Vitória-ES (n=23). En total, 3035 fibropapilomas (34,49 ± 27,69), de 1 a 129 por tortuga, fueron clasificados por categorías de tamaño: (1) < 1 cm (42,9% de los tumores), (2) 1 ≤ tumor < 4 cm (50,71%), (3) 4 ≤ tumor < 10 cm (6,06%), (4) ≥ 10 cm (0,33%). Se constató que los tumores se distribuyen en mayor cantidad en las aletas anteriores y posteriores (incluyendo en ambas piel adyacente) con un 44,18% y 29,16% respectivamente, región cervical (11,63%), plastrón (5,01%), ojos (4,15%), región inguinal y cola (3,23%), caparazón (1,75%) y escamas córneas de la cabeza (0,89%). Futuramente, los resultados serán correlacionados al histórico individual y concentraciones de compuestos organoclorados, estableciendo nuevas conductas para el análisis de la gravedad de esta enfermedad en tortugas verdes provenientes de la costa brasilera.
- Comparison between corporal subjetive classification and body condition index (BCI) for Chelonia mydas (Testudines, Cheloniidae) caught in Brazilian coast(2012) SÁNCHEZ-SARMIENTO, A.M; ROSSI, S; VANSTREEL, R.E.T; SANTOS, R.G; MARIGO, J; BERTOZZI, C.P; BAPTISTOTTE, C; BECKER, J.H; MATUSHIMA, E.RChelonia mydas, green sea turtle, is an endangered species by the IUCN (2012) and a vulnerable species in Brazil. The threats are catch, habitat degradation (including pollution) and diseases. The fibropapillomatosis (FP) is one of the greatest threats against the survival of C. mydas due to the multifactorial causes and impact all over the world. Biometric data (Curved Carapace Length-CCL, Curved Carapace WidthCCW and Body Mass-BM) of green sea turtles from Ubatuba-SP, Praia Grande-SP and Vitória-ES were recorded. Straight Carapace Length (SCL) was calculated from CCL and was used to obtain the Body Condition Index (BCI = BM / SCL3). BCI was tested versus subjective body condition (poor, fair and good), which evaluates the general aspect and concavity of plastron. The results demonstrated that the subjective classification is reliable for animals with poor condition; nevertheless, this classification is not clear for turtles estimated as fair and good. On the other hand, the objective classification (BCI) was an appropriate indicator for body condition. BCI of specimens caught by fishing net (1.54 ± 0.03) was higher than green sea turtles from rehabilitation (1.30 ± 0.08) or those found stranded or floating (1.23 ± 0.05). BCI was higher in females (1.45 ± 0.03) than males (1.28 ± 0.06). Further studies will attempt to correlate BCI with presence and intensity of FP and levels of organochlorine pollutants in tissues samples from C. mydas caught in other areas of Brazilian coast, aiming to clarify the role and impact of FP for green sea turtles conservation
Item Application of flow cytometry and gas chromatography to Study fibropapillomatosis in chelonia mydas (testudines, Cheloniidae) in brazil and their contributions for conservation of this species.(2012) ROSSI, S; SANCHEZ-SARMIENTO, A.M; VALE, L.A.S; GENOY-PUERTO, E. A; PRIOSTE, F.E.S; GATTAMORTA, M.A; KINOSHITA, D; HAZARBASSANOV, N.G.T.Q; BECKER, J.H; LIMA, E.H.S.M; BAPTISTOTTE, C; GOLDBERG, D.W; SANTOS, A.J.B; BORTOLON, L. F; MATUSHIMA, E. R- Nesting Biology and conservation of the leatherback sea turtle (Dermochelys coriacea) in Espírito Santo State, Brazil, 1988-1989 to 2003-2004.(Chelonian Conservation and Biology, 2007-05-01) THOMÉ, J. C. A; BAPTISTOTTE, C; MOREIRA, L. M. P; SCALFONI, J. T; ALMEIDA, A. P; RIETH, D. B; BARATA, P. C. RIn Brazil, the only area where regular leatherback sea turtle (Dermochelys coriacea) nesting is known to occur is located on the northern coast of the state of Espı´rito Santo, around latitude 198S. In this study, we present the field methods used by Projeto TAMAR-IBAMA (the Brazilian Sea Turtle Conservation Program) in the state of Espı´rito Santo and analyze data on leatherback nesting from 1988–1989 to 2003–2004. In that period, 527 nests were observed in the study area. The annual number of nests varied between 6 (in 1993–1994) and 92 (in 2002–2003). Between 1995–1996 and 2003–2004, the annual number of nests increased at about 20.4% per year on average. Among the 527 clutches observed, 358 (67.9%) were left in situ, 50 (9.5%) were relocated to another spot on the beach, 88 (16.7%) were relocated to open-air beach hatcheries, and 31 clutches (5.9%) did not have their management decision recorded. Curved carapace length of nesting females was in the range of 139–182 cm (mean ¼ 159.8 cm). At present, there is no significant alteration of the nesting habitat in Espı´rito Santo, egg poaching has been reduced to very low levels, and there is no subsistence hunting for sea turtles of any species. The main challenges to leatherback conservation currently are the incidental capture in artisanal fisheries operating close to nesting beaches and in high seas fisheries operating in the South Atlantic, as well as activities related to the oil industry. An overview of Projeto TAMAR’s actions addressing current sea turtle conservation issues in the State of Espı´rito Santo is presented.
- Reproductive biology and conservation status of the loggerhead sea turtle (Caretta caretta) in Espirito Santo State, Brazil.(2000) BAPTISTOTTE, C; THOMÉ, J. C. A; BJORNDAL, KThe reproductive biology of loggerheads nesting in Espírito Santo, Brazil, is evaluated for six nesting seasons (1991/1992 through 1996/1997), through data gathered by Projeto TAMAR-IBAMA, the Brazilian sea turtle conservation program. Mean curved carapace length of nesting females was 102.7 cm (n=198). Mean clutch size for clutches with more than 50 eggs was 119.7 (n=3664), and clutch size was significantly correlated with female body size. Management practices had significant effects on hatching success and incubation time. Mean hatching success of nests left in situ was 68.3% (n=879), of undepredated nests left in situ was 79.9% (n=751), and of nests moved to hatcheries and not depredated was 67.7% (n=2786). For nests moved to hatcheries, hatching success declined significantly with increasing time interval between oviposition and transfer to the hatchery. Mean incubation time was 59.5 days for nests left in situ (n=572) and 57.2 days for nests moved to hatcheries (n=2179). Incubation time declined significantly throughout the nesting season as temperatures increased; we conclude that sex ratio of hatchlings also shifts to more females as the season progresses. There was significant annual variation for all parameters. A short review of the conservation status of loggerheads in Espírito Santo State is also presented.