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
36 resultados
Filtros
Configurações
Resultados da Pesquisa
Item CHARACTERIZATION OF FIBROPAPILLOMA-ASSOCIATED TURTLE HERPESVIRUS IN GREEN TURTLES FROM BRAZIL(2010) RODENBUSCH, C R; BAPTISTOTTE, C; MELO, M.T.D.; PIRES, T.T.; WERNECK, M. R.; TOREZANI, E; CANAL, C.W.The fibropapillomatosis is an emerging disease with high prevalence in turtles and characterized by multiple papillomas, fibromas and fibropapillomas in the skin or viscera. This disease is called "green turtle fibropapillomatosis” (GTFP) because it was first recorded in green turtles.- Aso-turtle network: Collaborative efforts to understand strandings(2016) GOLDBERG, D.W; BAPTISTOTTE, C; D´AZEREDO, F.T; BERTOLOTO, A; GUIMARÃES, S; VELEZ-RUBIO, G; PROSDOSCIMI, L
- Prevalence of internal tumor in Green Turtles (Chelonia mydas) affected by Fibropapilomatosis in Brazil(2015) D´AZEREDO, F; PIRES, T; MONTE, T; MELO, T.D; VELLOSO, R; GOLDBERG, D; BAPTISTOTTE, C; ALMOSNY, N; BRUNO, S
Item Deeper mitochondrial sequencing reveals cryptic diversity and structure in Brazilian green turtle rookeries.(Chelonian Conservation and Biology, 2015) SHAMBLIN, B. M; DUTTON, P. H; BJORNDAL, K. A; BOLTEN, A. B; NARO-MACIEL, E; SANTOS, A. J. B; BELLINI, C; BAPTISTOTTE, C; MARCOVALDI, M. A; NAIRN, C. JGenetic markers are often used to designate population units for management and conservation, but widespread sharing of mitochondrial DNA control-region haplotypes defined from short (, 500 base-pair [bp]) sequences often limits inferences of population connectivity in marine turtles. Haplotype CM-A8, defined from 490-bp sequences, dominated the haplotype profiles of the 3 major green turtle (Chelonia mydas) rookeries in Brazil. Previous analyses based on 490-bp haplotypes did not detect differentiation between the northern rookeries of Atol das Rocas and Fernando de Norohna, but did indicate differentiation of the northern rookeries from Trindade Island in the south. We reexamined the stock structure of the Brazilian green turtle rookeries using 817-bp control region and mitochondrial short tandem repeat (mtSTR) sequences. Nine 490-bp haplotypes were subdivided into 41 haplotypes by combining 817-bp and mtSTR sequences. Eight of the 14 CM-A8 turtles from Fernando de Noronha carried mtSTR haplotypes that were not detected in the larger rookeries. Pairwise exact tests indicated that the northern Brazilian green turtle rookeries of the Rocas Atoll and Fernando de Noronha are discrete populations with respect to female natal homing. Moreover, several apparently endemic markers in the 3 Brazilian green turtle nesting populations should improve resolution of future mixedstock analyses. Comparable data are needed from green turtle rookeries in the central and eastern Atlantic to assess structure and connectivity at the ocean basin scale.Item Fibropapillomatosis in green turtles Chelonia mydas in Brazil: characteristics of tumors and virus.(Diseases of Aquatic Organisms Series, 2014) RODENBUSCH, C. R; BAPTISTOTTE, C; WERNECK, M. R; PIRES, T. T; MELO, M. T. D; ATAÍDE, M. W; REIS, K. D. H. L; TESTA, P; ALIEVE, M. M; CANAL, C. WFibropapillomatosis (FP) is a benign neoplasia that affects physiological functions of sea turtles and may lead to death. High prevalence of FP in sea turtle populations has prompted several research groups to study the disease and the associated herpesvirus, chelonid herpesvirus 5 (ChHV5). The present study detected and quantified ChHV5 in 153 fibropapilloma samples collected from green turtles Chelonia mydas on the Brazilian coast between 2009 and 2010 to characterize the relationship between viral load and tumor characteristics. Of the tumor samples collected, 73 and 87% were positive for ChHV5 in conventional PCR and real-time PCR, respectively, and viral loads ranged between 1 and 118.62 copies cell−1. Thirty-three percent of turtles were mildly, 28% were moderately and 39% were severely affected with FP. Skin samples were used as negative control. High viral loads correlated positively with increasing FP severity in turtles sampled on the Brazilian coast and with samples from turtles found dead in the states of São Paulo and Bahia. Six viral variants were detected in tumor samples, 4 of which were similar to the Atlantic phylogenetic group. Two variants were similar to the western Atlantic/eastern Caribbean phylogenetic group. Co-infection in turtles with more than one variant was observed in the states of São Paulo and Bahia.- Avaliação dos encalhes de tartarugas marinhas: um indicador estratégico para a conservação.(2013) GOLDBERG, D. W; PIRES, T. T; CASTILHOS, J. C; MARCOVALDI, M. A; LOPEZ, G. G; LIMA, E. P; BAPTISTOTTE, C
- The Interplay of Homing and Dispersal in Green Turtles: A Focus on the Southwestern Atlantic(Journal of Heredity, 2012-10-08) NARO-MACIEL, E; BONDIOLI, A.C.V; MARTIN, M; ALMEIDA, A.P; BAPTISTOTTE, C; BELLINI, C; MARCOVALDI, M.A; SANTOS, A.J.B; AMATO, GCurrent understanding of spatial ecology is insufficient in many threatened marine species, failing to provide a solid basis for conservation and management. To address this issue for globally endangered green turtles, we investigated their population distribution by sequencing a mitochondrial control region segment from the Rocas Atoll courtship area (n = 30 males) and four feeding grounds (FGs) in Brazil (n = 397), and compared our findings to published data (nnesting = 1205; nfeeding = 1587). At Rocas Atoll, the first Atlantic courtship area sequenced to date, we found males were differentiated from local juveniles but not from nesting females. In combination with tag data, this indicates possible male philopatry. The most common haplotypes detected at the study sites were CMA-08 and CMA-05, and significant temporal variation was not revealed. Although feeding grounds were differentiated overall, intra-regional structure was less pronounced. Ascension was the primary natal source of the study FGs, with Surinam and Trindade as secondary sources. The study clarified the primary connectivity between Trindade and Brazil. Possible linkages to African populations were considered, but there was insufficient resolution to conclusively determine this connection. The distribution of FG haplotype lineages was nonrandom and indicative of regional clustering. The study investigated impacts of population size, geographic distance, ocean currents, and juvenile natal homing on connectivity, addressed calls for increased genetic sampling in the southwestern Atlantic, and provided data important for conservation of globally endangered green turtles.
- 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