Marine turtles of Brazil:the history and structure of Projeto TAMAR-IBAMA

Marcovaldi, Maria Ângela; Marcovaldi, Guy

doi:10.1016/s0006-3207(99)00043-9

Cited by 229 publications

(186 citation statements)

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“…It uses mainly oceanic islands to nest and it is usually not found along the northeastern coast during the turtle's reproductive period, which is between September and March and in some cases in April (Marcovaldi & Marcovaldi 1999). Nevertheless, it was the most common species in this study, being present in all prospected areas.…”

Section: The Green-sea-turtle Chelonia Mydasmentioning

confidence: 74%

“…The sea turtles distribution in Brazil is well known and the main areas used for reproduction, feeding and resting are defined as a whole. Northeastern Brazil is very important region to sea turtles and five species are recorded in that area (Marcovaldi & Marcovaldi 1999, Sanches, 1999. Although there is this general knowledge about sea turtles in northeast Brazil, there are no information correlating its occurrence with seismic surveys.…”

Section: Discussionmentioning

confidence: 99%

“…The olive-ridley-turtle is an essentially pelagic species comes nearshore during its reproductive period (Hendrickson 1980) and it is the main species along the coastline of Sergipe between September and March (Marcovaldi & Marcovaldi 1999, Sanches 1999, Silva et al 2001. The north coastline of that state has a very important nesting area to sea turtles called Biological Reserve of Santa Isabel.…”

Section: The Olive-ridley-turtle Lepidochelys Olivaceamentioning

confidence: 99%

“…Five of these species come to the coast of Brazil to feed and reproduce (Marcovaldi & Marcovaldi 1999). According to The World Conservation Union (IUCN) all species of sea turtle occurring along the Brazilian coast are threatened.…”

Section: Introductionmentioning

confidence: 99%

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Occurrence of sea turtles during seismic surveys in Northeastern Brazil

2006

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There are seven species of sea turtles around the world. Among these, five visit the northeast coast of Brazil to reproduce and feed. These sea turtles are impacted by human activity and need conservation measures. The seismic survey is one of these activities due to its high intensity and low frequency sound emissions in the marine environment. Records of sea turtles during seismic surveys in shallow waters of the northeast of Brazil between 2002 and 2003 are presented in this study with some discussion about the effectiveness of the monitoring procedures. Three species of sea turtle were recorded within the seismic survey areas. The Chelonia mydas species was the most commonly sighted turtle. There was only one record of Caretta caretta and Lepidochelys olivacea. The presence of sea turtles in Sergipe state was linked to the reproductive period while this pattern was not observed in Ceará state. The absence of information about distribution and abundance of sea turtles in the surveyed areas previous to and after the seismic surveys, as well as numerous incomplete data make it hard to identify the effect of seismic surveys on those factors and also sea turtle behaviors. Existem atualmente sete espécies de tartarugas marinhas distribuídas no mundo. Dessas, cinco ocorrem no nordeste do Brasil, utilizando a área para reprodução e alimentação. As populações sofrem os efeitos das atividades humanas, necessitando de medidas para a conservação. Dentre as atividades de risco, destaca-se a prospecção sísmica, a qual emite sons de alta intensidade e baixa freqüência no ambiente marinho podendo causar efeitos negativos nos diversos animais. As observações de tartarugas marinhas realizadas durante as prospecções sísmicas ocorridas em águas rasas do nordeste brasileiro entre 2002 e 2003 são apresentadas em conjunto com uma discussão sobre a efetividade das observações. Foi registrada a presença de três espécies de tartarugas marinhas na área dos estudos sísmicos no nordeste do Brasil. A tartaruga Chelonia mydas foi a espécie mais observada nos monitoramentos, com apenas um registro das outras duas espécies identificadas, Caretta caretta e Lepidochelys olivacea. A presença de tartarugas em Sergipe esteve relacionada com o período reprodutivo, enquanto que no Ceará, a ocorrência foi maior fora da temporada reprodutiva. A ausência de dados pretéritos e posteriores à análise e a grande quantidade de dados incompletos dificultaram a identificação dos efeitos da atividade sísmica na abundância, na distribuição e no comportamento das tartarugas marinhas. Palavras-chave: tartaruga marinha, prospecção sísmica, monitoramento de animais marinhos, América do Sul, Nordeste do BrasilBiota Neotropica v6(n1) -http://www.biotaneotropica.org.br/v6n1/pt/abstract?article+bn00306012006

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Section: The Green-sea-turtle Chelonia Mydasmentioning

confidence: 74%

Section: Discussionmentioning

confidence: 99%

Section: The Olive-ridley-turtle Lepidochelys Olivaceamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Occurrence of sea turtles during seismic surveys in Northeastern Brazil

2006

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“…Moreover, strong evidence suggests that predation of juveniles and eggs, predatory fishing and water pollution contribute towards this risk. In order to avoid decreases in turtle populations, conservation programs are currently in progress in Brazil (MARCOVALDI;MARCOVALDI, 1999). It is important to note that, as a further important conservation procedure, the diseases that affect sea turtles should be identified.…”

Section: Report and Discussionmentioning

confidence: 99%

Marine leech Ozobranchus margoi parasitizing loggerhead turtle (Caretta caretta) in Rio Grande do Sul, Brazil

Rodenbusch

Marks

Canal

et al. 2012

Rev. Bras. Parasitol. Vet.

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Marine leech AbstractThis paper reports the finding of several Ozobranchus margoi (Annelida: Hirudinea) parasitizing a loggerhead turtle (Caretta caretta) that was found in the municipality of Tavares, state of Rio Grande do Sul, southern Brazil. Since this parasite is considered to be a vector of chelonid herpesvirus 5 (ChHV-5), the leeches collected were tested for the presence of this virus. All the specimens were negative on PCR analysis. Although O. margoi is considered to be a common sea turtle parasite, this is the first official record describing collection of this parasite from a loggerhead turtle in southern Brazil, within the country's subtropical zone. This finding draws attention to the presence of this parasite and to the risk of leech-borne infectious diseases among turtles found along the coast of southern Brazil.Keywords: Ozobranchus margoi, Hirudinea, leech, loggerhead turtle, ectoparasite. ResumoEste artigo relata a descoberta de vários exemplares de Ozobranchus margoi (Annelida Hirudínea) parasitando uma tartaruga cabeçuda (Caretta caretta) encontrada no município de Tavares, Rio Grande do Sul, sul do Brasil. Uma vez que esse parasito é considerado vetor do chelonid herpesvirus 5 (ChHV 5), as sanguessugas foram testadas para a presença deste vírus. Todas as amostras foram negativas pela análise de PCR. Embora o O. margoi seja considerado um parasito comum de tartarugas marinhas, este é o primeiro registro oficial que descreve a coleta deste parasita em uma tartaruga cabeçuda no sul do Brasil, dentro da zona subtropical do país. Este achado chama a atenção para a presença deste parasita e para o risco de sanguessugas transmitirem doenças infecciosas em tartarugas no litoral sul do Brasil.

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Spatio‐temporal distribution of sea turtle strandings and factors contributing to their mortality in south‐eastern Brazil

Tagliolatto

Goldberg

Godfrey

et al. 2019

Aquatic Conservation

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Data on stranded sea turtles were examined between 2010 and 2016 along the northern region of Rio de Janeiro state and between 2016 and 2017 in the southern region, looking for spatio‐temporal patterns and determining which factors contributed to their mortality. A total of 12,162 strandings of all five species that occur in Brazil were recorded, with Chelonia mydas being the most common (89.9%). Sea turtles use the Rio de Janeiro coast as a feeding and/or migration area. The intense upwelling (October to April) may be an important factor for the sea turtles feeding in this region, mainly for Eretmochelys imbricata and Dermochelys coriacea, which had a higher number of strandings during this period. Areas further north of the study area include an important nesting site for Caretta caretta in Brazil, which explains the higher concentration of strandings of subadults/adults of this species in this region and during its nesting season. Many anthropogenic threats to sea turtles were documented, mainly incidental capture in fisheries and marine debris, indicating possible hotspots for these threats in the regions of Sepetiba and Guanabara Bays, Cabo Frio, and São Francisco de Itabapoana. Among the natural causes of strandings, the primary factors were chronic illness, endoparasites, and fibropapillomatosis. However, pollution may also be an indirect threat, which negatively affects these animals through reduced health and immunosuppression, leaving them more susceptible to opportunistic diseases. These data are valuable for directing and implementing specific and local mitigation measures along the Rio de Janeiro state coast, such as avoiding bycatch hotspots through fleet communication programmes and/or area and seasonal closures, enforceable legislation, effective penalties and proper waste management.

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Marine turtles of Brazil:the history and structure of Projeto TAMAR-IBAMA

Cited by 229 publications

References 3 publications

Occurrence of sea turtles during seismic surveys in Northeastern Brazil

Occurrence of sea turtles during seismic surveys in Northeastern Brazil

Marine leech Ozobranchus margoi parasitizing loggerhead turtle (Caretta caretta) in Rio Grande do Sul, Brazil

Spatio‐temporal distribution of sea turtle strandings and factors contributing to their mortality in south‐eastern Brazil

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