Navegando por Assunto "Chelonia mydas"
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- Abundance, size and overall body conditions of juvenile green turtles (Chelonia mydas) in the effluent discharge channel of Tubarão Steel Company, Espírito Santo, Brazil.(2005) TOREZANI, E; BAPTISTOTTE, C; COELHO, B. B
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. RItem Avaliação do Estado de Conservação da Tartaruga Marinha Chelonia mydas (Linnaeus, 1758) no Brasil(2011-04-02) Almeida, Antônio de Pádua; Santos, Armando José Barsante; Thomé, João Carlos Alciatti; Belini, Claudio; Baptistotte, Cecilia; Marcovaldi, Maria Ângela; Santos, Alexsandro Santana dos; Lopez, MilagrosItem Avaliação do Estado de Conservação da Tartaruga Marinha Chelonia mydas (Linnaeus, 1758) no Brasil.(2011-01-27) ALMEIDA, A. de P; SANTOS, A. J. B; THOMÉ, J. C. A; BELLINI, C; BAPTISTOTTE, C; MARCOVALDI, M. Â; SANTOS, A. S. dos; LOPEZ, MilagrosItem Coastal habitat degradation and green sea turtle diets in Southeastern Brazil(2011-06) Santos, R. G.; Martins, A. S; Farias, J. N; Horta, P. A.; Pinheiro, H. T.; Torezani, E.; Baptistotte, C.; Seminoff, J. A.; Balazs, G. H.; Work, T. M.To show the influence of coastal habitat degradation on the availability of food for green turtles (Chelonia mydas), we assessed the dietary preferences and macroalgae community at a feeding area in a highly urbanized region. The area showed low species richness and was classified as degraded. We examined stomach contents of 15 dead stranded turtles (CCL = 44.0 cm (SD 6.7 cm)). The diet was composed primarily of green algae Ulva spp. (83.6%). In contrast, the macroalgae community was dominated by the green alga Caulerpa mexicana. We found a selection for red algae, seagrass and Ulva spp., and avoidance for C. mexicana and brown alga Dictyopteris delicatula. The low diversity of available food items, possibly a result of environmental degradation, likely contributed to the low dietary diversity. The nutritional implications of this restricted diet are unclear.- Coastal Habitat Degradation and Green Sea Turtle Diets in Southeastern Brazil.(Marine Pollution Bulletin, 2011-06) SANTOS, R. G; MARTINS, A. S; FARIAS, J. N; HORTA, P. A; PINHEIRO, H. T; TOREZANI, E; BAPTISTOTTE, C; SEMINOFF, J. A; BALAZS, G. H; WORK, T. MTo show the influence of coastal habitat degradation on the availability of food for green turtles (Chelonia mydas), we assessed the dietary preferences and macroalgae community at a feeding area in a highly urbanized region. The area showed low species richness and was classified as degraded. We examined stomach contents of 15 dead stranded turtles (CCL = 44.0 cm (SD 6.7 cm)). The diet was composed primarily of green algae Ulva spp. (83.6%). In contrast, the macroalgae community was dominated by the green alga Caulerpa mexicana. We found a selection for red algae, seagrass and Ulva spp., and avoidance for C. mexicana and brown alga Dictyopteris delicatula. The low diversity of available food items, possibly a result of environmental degradation, likely contributed to the low dietary diversity. The nutritional implications of this restricted diet are unclear.
- 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 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.- 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.
Item Encalhes e interação da pesca costeira com tartarugas marinhas em Anchieta – Espírito Santo, Brasil(2013) Nilamon Leite Jr; Roberto Berrêdo; Maria Rosa; Bruno Giffoni; Gilberto Sales; Mariana Britto; João ThoméAtualmente existem no mundo sete espécies de tartarugas marinhas, sendo que cinco ocorrem no Brasil: tartaruga cabeçuda (Caretta caretta), tartaruga de pente (Eretmochelys imbricata), tartaruga oliva (Lepidochelys olivacea), tartaruga verde (Chelonia mydas) e tartaruga de couro (Dermochelys coriacea).Todas estão na lista vermelha de espécies ameaçadas de extinção da União Internacional para Conservação da Natureza (IUCN, 2013). Desde 2003 o Projeto TAMAR vem monitorando a costa do município de Anchieta e parte do município de Guarapari litoral sul do Espírito Santo. A região é importante para a conservação das tartarugas marinhas, especialmente para a espécie C. caretta, uma vez que as fêmeas desta espécie vêm às praias desta região entre setembro e março, realizando cerca de 100 desovas anualmente. As demais espécies de tartarugas marinhas, embora não realizem desovas, também ocorrem na região utilizando-a como área de passagem e alimentação, principalmente a tartaruga verde (C.mydas) e a tartaruga de pente (E.imbricata). Devido ao grande número de ocorrências de encalhes nas praias monitoradas, principalmente de juvenis de C. mydas, o Projeto TAMAR iniciou na região um estudo para avaliar os impactos causados pela interação entre as tartarugas e a atividade pesqueira. O objetivo deste estudo é avaliar a possível correlação entre os encalhes de tartarugas marinhas e a pesca de camarão e lagosta no litoral sul do Espírito Santo, entre os anos de 2007 e 2012.- 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).
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.Item Fibropapilomatose em Tartarugas Verdes (Chelonia mydas) da Bahia - Caracterização Molecular do chhv.(2011-11) RODENBUSCH, C. R; PIRES, T. T; BAPTISTOTTE, C; CANAL, C. WA fibropapilomatose (FP) é uma doença neoplásica caracterizada por um único ou múltiplos crescimentos fibroepiteliais cutáneos, com uma superficie verrugosa ou plana, e aparecendo como fibromas nas visceras (Kang et al. 2008). Os tumores se localizam ao redor dos olhos, na conjuntiva, cavidade oral, pescoço, nadadeiras, cauda, áreas axilares e inguinais e também em órgãos viscerais. O tamanho varia de poucos milimetros até 30 centimetros de diâmetro e os tumores podem causar a morte do animal por interferir na visão, locomoção, alimentação, respiração; já os tumores viscerais podem ser invasivos e prejudicar a função do órgão afetado (George 1997; Yu et al. 2000). O primeiro registro de FP na costa brasileira é de 1986. Entre 2000 e 2004, de 4.471 tartarugas-verdes (Chelonia mydas) examinadas 14,96% apresentavam tumores. A prevalência de tumores por ano foi de 12,91% (2000, n = 604), 14,96% (2001, n = 809), 14,79% (2002, n = 818), 19,95% (2003, n = 842) e 12,95% (2004, n = 1398) (Baptistotte et al. 2005). O padrão de disseminação da doença durante surtos em tartarugas-verdes de cativeiro consiste com uma etiologia contagiosa. Um herpesvirus (chelonid herpesvirus 5- ChHV 5) tem sido identificado em fibropapilomas (Herbst et al. 1995, Davison et al. 2009) e está presente em 100% dos tumores induzidos por inoculação de filtrados de células tumorais (Ene et al. 2005) e em 95% das infecções naturais, sendo que em 79% dos fibropapilomas e fibromas analisados por PCR em tempo-real quantitativo, o virus estava presente em niveis que excediam 10+ cópias por 100 ng de DNA total de tumores (Quackenbush et al. 2001). O presente estudo tem como objetivo detectar e quantificar o ChHV 5 em fibropapilomas de tartarugas- verdes do litoral da Bahia.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.Item Green Turtle, Chelonia mydas in the Island of Poilão, Bolama-Bijagós Archipelago, Guinea-Bissau, West Africa(1998) FORTES, O; PIRES, A.J; BELLINI, CThe Bijagós Archipelago consists of approximately 80 islands, of which only 21 are permanently inhabited, and is located between 10o 43' - 11o 40' N and 15o 20' - 17o 00' E, occupying an area of approximately 11 000 km2 (Fig. 1). Sand banks and mud flats make up a large part of the area. In April 1996, the Bijagós Biosphere Reserve was created to protect the unique natural resources, biodiversity and high natural productivity of the region. The Reserve allows for sustainable development and the integration of the Bijagós community with the environment.Item Juvenile green turtles (Chelonia mydas) in the effluent discharge channel of a steel plant, Espírito Santo, Brazil, 2000–2006(2010) TOREZANI, E.; BAPTISTOTTE, C.; MENDES, S. L.; BARATA, P. C. R.; Marine Biological Association of the United KingdomThis study, carried out from August 2000 to July 2006, began out of the recognition of a special ecological situation, when an aggregation of juvenile green turtles (Chelonia mydas) was found inside the effluent discharge channel of a steel plant located near Vito´ria, the State of Espı´rito Santo capital, eastern Brazil. The green turtles were captured through either cast nets or a set net or by hand (one turtle was captured alive on one of the channel banks); after data collection, they were released back into the discharge channel. Information is here reported on the temporal pattern of occurrence, size-classes, residency, presence of tumours and growth rates of tumoured and non-tumoured green turtles in the study area. A total of 640 individual green turtles were captured in the six years; 448 of them were captured just once, and 192 were captured two or more times. Curved carapace length ranged between 25.2 and 77.5 cm. Among the captured green turtles, 59.1% were classified as being in normal body condition and without any tumours, 6.6% were either underweight or emaciated but without any tumours, and 34.4% had tumours, with different levels of the tumour severity score.Item Juvenile green turtles (Chelonia mydas) in the effluent discharge channel of a steel plant, Espírito Santo, Brazil, 2000-2006.(Journal of the Marine Biological Association of the United Kingdom, 2010-03) Torezani, E; Baptistotte, Cecília; Mendes, S. L; Barata, P. C. RThis study, carried out from August 2000 to July 2006, began out of the recognition of a special ecological situation, when an aggregation of juvenile green turtles (Chelonia mydas) was found inside the effluent discharge channel of a steel plant located near Vito´ria, the State of Espı´rito Santo capital, eastern Brazil. The green turtles were captured through either cast nets or a set net or by hand (one turtle was captured alive on one of the channel banks); after data collection, they were released back into the discharge channel. Information is here reported on the temporal pattern of occurrence, size-classes, residency, presence of tumours and growth rates of tumoured and non-tumoured green turtles in the study area. A total of 640 individual green turtles were captured in the six years; 448 of them were captured just once, and 192 were captured two or more times. Curved carapace length ranged between 25.2 and 77.5 cm. Among the captured green turtles, 59.1% were classified as being in normal body condition and without any tumours, 6.6% were either underweight or emaciated but without any tumours, and 34.4% had tumours, with different levels of the tumour severity scoreItem Marcação e biometria de tartarugas marinhas Chelonia mydas juvenis no efluente da Companhia Siderúrgica de Tubarão, Vitória, Estado do Espírito Santo, Brasil, 2000-2001.(2002) BAPTISTOTTE, C; AGRIZZI, E. J; MOREIRA, L. M. P; TOREZANI, E; COELHO, B. B; SCALFONI, J. T; BARATA, P. C. R