scholarly journals Checklist of sea turtles endohelminth in Neotropical region

2016 ◽  
Vol 53 (3) ◽  
pp. 211-223 ◽  
Author(s):  
M. R. Werneck ◽  
R. J. Da Silva
Keyword(s):  
Sea Turtles ◽  
Loggerhead Turtle ◽  
Chelonia Mydas ◽  
Neotropical Region ◽  
Dermochelys Coriacea ◽  
Olive Ridley ◽  
Eretmochelys Imbricata ◽  
Leatherback Turtle ◽  
Lepidochelys Olivacea ◽  
The Caribbean

SummaryThis paper presents a list of parasites described in sea turtles from the Neotropical region. Through the review of literature the occurrence of 79 taxa of helminthes parasites were observed, mostly consisting of the Phylum Platyhelminthes with 76 species distributed in 14 families and 2 families of the Phylum Nematoda within 3 species. Regarding the parasite records, the most studied host was the green turtle (Chelonia mydas) followed by the hawksbill turtle (Eretmochelys imbricata), olive ridley turtle (Lepidochelys olivacea), loggerhead turtle (Caretta caretta) and leatherback turtle (Dermochelys coriacea). Overall helminths were reported in 12 countries and in the Caribbean Sea region. This checklist is the largest compilation of data on helminths found in sea turtles in the Neotropical region.

scholarly journals Sea turtles of Madagascar – their status, exploitation and conservation

Oryx ◽  
1994 ◽  
Vol 28 (1) ◽  
pp. 51-61 ◽  
Author(s):  
Berthin Rakotonirina ◽  
Andrew Cooke
Keyword(s):  
Coastal Waters ◽  
Sea Turtles ◽  
Loggerhead Turtle ◽  
Chelonia Mydas ◽  
Dermochelys Coriacea ◽  
Olive Ridley ◽  
Eretmochelys Imbricata ◽  
Lepidochelys Olivacea ◽  
Average Size ◽  
Hawksbill Turtles

Five species of sea turtles are known from Madagascar's coastal waters. Fishermen on the western and south-western coasts take green turtle Chelonia mydas, loggerhead turtle Caretta caretta and olive ridley Lepidochelys olivacea for their meat. The hawksbill turtle Eretmochelys imbricata is taken mainly for its shell and for making stuffed specimens while the leatherback Dermochelys coriacea is seldom caught. Anecdotal evidence of fishermen and dealers in turtle products, measurement of captured animals and personal observations of the authors all point to declines in numbers and average size for green and hawksbill turtles, coupled with marked declines in nesting rates for these and the olive ridley.

scholarly journals First field observation of the predation by Jaguar (Panthera onca) on Olive Ridley sea turtle (Lepidochelys olivacea) at Nancite Beach, Santa Rosa National Park, Costa Rica

2016 ◽  
Vol 3 (1) ◽  
pp. 20-23
Author(s):  
Sergio Escobar-Lasso ◽  
Luis Fonseca ◽  
Wilbert N. Villachica ◽  
Hansel Herrera ◽  
Roldán A. Valverde ◽  
...  
Keyword(s):  
Costa Rica ◽  
Sea Turtles ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Dermochelys Coriacea ◽  
Olive Ridley ◽  
Eretmochelys Imbricata ◽  
Lepidochelys Olivacea ◽  
Santa Rosa National Park ◽  
Key Resources

Jaguars have been recorded preying on adult female sea turtles on their nesting beaches in Costa Rica, Guyana, Mexico and Suriname (Fretey 1977, Autar 1994, Cuevas et al. 2014, Guildera et al. 2015). Jaguars prey on Green (Chelonia mydas), Olive Ridley (Lepidochelys olivacea), Hawksbill (Eretmochelys imbricata), and Leatherback (Dermochelys coriacea) sea turtles (see Fretey 1977, Autar 1994, Carrillo et al. 1994, Chinchilla 1997, Tröeng 2000, Heithaus et al. 2008, Veríssimo et al. 2012, Arroyo-Arce et al. 2014, Cuevas et al. 2014, Arroyo-Arce & Salom-Pérez 2015, Guildera et al. 2015). The capture effort and risk of injury associated with the predation of nesting sea turtles is expected to be lower relative to other prey species in the jaguar’s diet (Cavalcanti & Gese 2010). Additionally, they can be key resources when other pr ey availability is low (Veríssimo et al. 2012).

scholarly journals Plesiochorus cymbiformis (Rudolphi, 1819) Looss, 1901 (Digenea: Gorgoderidae) in Olive Ridley Sea turtles Lepidochelys olivacea (Eschscholtz, 1829) (Testudines: Chelonidae) from the Brazilian coast: New geographic occurrence and associated injuries

2021 ◽  
Vol 58 (4) ◽  
pp. 408-414
Author(s):  
H. Jerdy ◽  
R. B. Ferioli ◽  
H. Gallo Neto ◽  
M. Zíllio ◽  
A. Monteiro ◽  
...  
Keyword(s):  
Sea Turtles ◽  
Chelonia Mydas ◽  
Neotropical Region ◽  
Brazilian Coast ◽  
Olive Ridley ◽  
Loggerhead Sea Turtles ◽  
Eretmochelys Imbricata ◽  
Lepidochelys Olivacea ◽  
First Occurrence ◽  
Olive Ridley Sea Turtles

Summary The present study reports the first occurrence of Plesiochorus cymbiformis (Digenea: Gorgoderidae), in two Olive Ridley Sea turtles Lepidochelys olivacea (Testudines: Chelonidae), from the states of São Paulo and Sergipe in Brazilian coast. Concerning the Neotropical region, P. cymbiformis has been previously reported in green sea turtles (Chelonia mydas) from Panama and Brazil, in loggerhead sea turtles (Caretta caretta) from Brazil, in hawksbill sea turtles (Eretmochelys imbricata) from Puerto Rico, and in Olive Ridley Sea turtles only in Costa Rica. Lesions resulting from the presence of parasites in the hosts’ urinary bladders are also presented. This is the second report on endoparasites in Olive Ridley sea turtles from Brazil.

scholarly journals Strandings of sea turtles on beaches around the oil capital in Brazil

2021 ◽  
Vol 16 (4) ◽  
pp. 521-538
Author(s):  
Raísa da Silva Costa Rêgo ◽  
Eric Azevedo Cazetta ◽  
Caio Henrique Gonçalves Cutrim ◽  
Amanda Soares Miranda ◽  
Ana Paula Albano Araújo ◽  
...  
Keyword(s):  
Sea Turtles ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
The State ◽  
Dermochelys Coriacea ◽  
Anthropogenic Factors ◽  
Long Beach ◽  
Eretmochelys Imbricata ◽  
Lepidochelys Olivacea ◽  
The North

The south-western region of the Atlantic Ocean has feeding and nesting areas for the five species of sea turtles registered in Brazil, which are in different degrees of extinction threat, mainly due to anthropogenic factors. Fishing and the ingestion of solid waste, were identified as causing stranding and the mortality of sea turtles. In this work, data from the monitoring of beaches in the Municipalities of Macaé and Rio das Ostras, important oil zone in Brazil, in the north-central region of the State of Rio de Janeiro, were used in order to analyse the effects of seasonality on the sea turtle stranding. The monitoring was carried out daily from September 2017 to June 2019, in a study area covering 23.8 km long beach. Stranding data were obtained from active (n = 126) and passive (n = 66) monitoring of beaches and included the records of Chelonia mydas (n = 151), Caretta caretta (n = 23), Lepidochelys olivacea (n = 14), Dermochelys coriacea (n = 2) and Eretmochelys imbricata (n = 1). The largest stranding record occurred in the summer (n = 61) and spring (n = 60), a period compatible with the reproductive season of the species. The results obtained in this study emphasise the importance of the analysis of strandings of sea turtles, which provide relevant data on the biology of the group, the intra and interspecific dynamics and the state of conservation of these animals.

scholarly journals Plastic ingestion by sea turtles in Paraíba State, Northeast Brazil

2015 ◽  
Vol 105 (3) ◽  
pp. 265-270 ◽  
Author(s):  
Camila Poli ◽  
Daniel Oliveira Mesquita ◽  
Cinthia Saska ◽  
Rita Mascarenhas
Keyword(s):  
Gastrointestinal Tract ◽  
Carapace Length ◽  
Sea Turtles ◽  
Chelonia Mydas ◽  
Northeast Brazil ◽  
Plastic Pollution ◽  
Olive Ridley ◽  
Eretmochelys Imbricata ◽  
Lepidochelys Olivacea ◽  
Green Turtles

ABSTRACT Currently, plastics are recognized as a major pollutant of the marine environment, representing a serious threat to ocean wildlife. Here, we examined the occurrence and effects of plastic ingestion by sea turtles found stranded along the coast of Paraíba State, Brazil from August 2009 to July 2010. Ninety-eight digestive tracts were examined, with plastic found in 20 (20.4%). Sixty five percent (n = 13) of turtles with plastic in the digestive tract were green turtles (Chelonia mydas), 25% (n = 5) were hawksbills (Eretmochelys imbricata), and 10% (n = 2) were olive ridley (Lepidochelys olivacea). More plastic was found in the intestine (85%) than in other parts of the gastrointestinal tract. We observed complete blockage of the gastrointestinal tract due to the presence of plastic in 13 of the 20 turtles that had ingested plastic. No correlation was found between the curved carapace length (CCL) and the number or mass of the plastic ingested items. Significant differences were found between the intake of hard and soft plastic and the ingestion of white/transparent and colored plastic, with soft and white/transparent plastics being more commonly ingested. This study reveals the serious problem of plastic pollution to sea turtles at the area.

scholarly journals The distribution and conservation status of marine turtles in The Gambia, West Africa: a first assessment

Oryx ◽  
2004 ◽  
Vol 38 (2) ◽  
pp. 203-208 ◽  
Author(s):  
Linda K. Barnett ◽  
Craig Emms ◽  
Alpha Jallow ◽  
Anna Mbenga Cham ◽  
Jeanne A. Mortimer
Keyword(s):  
Conservation Status ◽  
Chelonia Mydas ◽  
The Gambia ◽  
Dermochelys Coriacea ◽  
Olive Ridley ◽  
Leatherback Turtles ◽  
Eretmochelys Imbricata ◽  
Lepidochelys Olivacea ◽  
Marine Turtles ◽  
Green Turtles

This paper reports the first systematic survey of the marine turtles of the 80 km of Gambian coastline, and brings together new data and all past records and reports of marine turtles in The Gambia. Green turtles Chelonia mydas are the most abundant turtles and this is the only species so far observed nesting in The Gambia, with peak nesting between August and October. Although 75% (60 km) of The Gambian coastline appears to be suitable for turtle nesting, most nesting activity is confined to the southern coastline. Offshore foraging habitat is apparently extensive. Strandings of green turtles, olive ridley turtles Lepidochelys olivacea, leatherback turtles Dermochelys coriacea and hawksbill turtles Eretmochelys imbricata have been recorded, but we were unable to find evidence for loggerhead turtles Caretta caretta. Threats are mainly of human origin, and include illegal harvesting of eggs, juveniles and adults, as well as mortality as fisheries bycatch, including trawling. One stranded green turtle apparently had fibropapilloma disease. The major threat to nesting habitats is erosion and unregulated development of the coast for tourism. Marine turtles are fully protected under Gambian law. Other national efforts to conserve turtles in The Gambia are described and assessed.

scholarly journals PERFIL EPIDEMIOLÓGICO DA FIBROPAPILOMATOSE EM TARTARUGAS-MARINHAS ENCALHADAS ENTRE O LITORAL SUL DE ALAGOAS E NORTE DA BAHIA, NORDESTE DO BRASIL

2017 ◽  
Vol 20 (2) ◽  
Author(s):  
Leticia Koproski ◽  
Órion Pedro da Silva ◽  
Caio Alexandre Maciel Santos ◽  
Andrei Manoel Brum Febrônio ◽  
Fábio Teles de Santana ◽  
...  
Keyword(s):  
Chelonia Mydas ◽  
Caretta Caretta ◽  
Dermochelys Coriacea ◽  
Eretmochelys Imbricata ◽  
Lepidochelys Olivacea

Em um intervalo de quatro anos, a prevalência da fibropapilomatose em tartarugas encalhadas em uma região do nordeste do Brasil compreendida entre o sul de Alagoas e o norte da Bahia foi de 16% em Chelonia mydas, 2% em Caretta caretta e 0,6% em Lepidochelys olivacea. C. mydas acometidas apresentaram biometria média de 0,49m de Comprimento Curvilíneo da Carapaça - CCC. Machos e fêmeas foram igualmente acometidos, numa média de 22%. Pela análise de 1231 registros fotográficos, a média foi de 13 tumores por C. mydas. Nessa espécie 76,77% dos tumores foram registrados na parte anterior do corpo, 17,97% na região posterior, 4,12% na carapaça e plastrão e 1,0% nos globos oculares. Não foram registrados tumores na cavidade oral. C. mydas foram em sua maioria moderadamente afetadas pela doença. L. olivacea acometida apresentou biometria média de 0,69m de CCC. Machos e fêmeas foram atingidas numa média de 1,0%. Os tumores em L. olivacea foram observados na porção anterior e posterior do corpo. Somente um indivíduo do sexo masculino de C. caretta, com biometria de 1,03m de CCC apresentou sinal da doença. A C. caretta apresentava um tumor externo pedunculado na região cervical, de tamanho entre 1,1cm e 4,0cm de diâmetro. As prevalências da fibropapilomatose em Eretmochelys imbricata e Dermochelys coriacea foram de 0,0%. A prevalência da fibropapilomatose em C. mydas segue padrões encontrados para a costa brasileira. No entanto, a doença se manifesta com severidade levemente superior a encontrada no litoral da região sudeste do país.

scholarly journals MARES E TARTARUGAS VERDES: ANÁLISE DE ENCALHES DE CHELONIA MYDAS NO LITORAL DE FORTALEZA

2021 ◽  
Author(s):  
Arthur José Cavalcante Gois ◽  
Ívina Leal Dos Santos
Keyword(s):  
Chelonia Mydas ◽  
Caretta Caretta ◽  
Dermochelys Coriacea ◽  
Eretmochelys Imbricata ◽  
Lepidochelys Olivacea

Introdução: O Instituto Verdeluz é uma ONG ambientalista que atua na cidade de Fortaleza e região metropolitana, contendo 4 projetos. Um destes projetos é o GTAR, que atua na pesquisa e conservação com as cinco espécies de tartarugas marinhas que ocorrem no litoral brasileiro, sendo elas Tartaruga-Verde (Chelonia Mydas), Tartaruga-de-Pente (Eretmochelys imbricata), Tartaruga-de-Couro (Dermochelys coriácea), Tartaruga-Oliva (Lepidochelys olivácea) e Tartaruga-Cabeçuda (Caretta caretta). Ainda que em diferentes níveis, estas espécies são classificas como ameaçadas, sendo a Tartaruga-Verde, objeto de estudo deste projeto, classificada como vulnerável e em perigo, segundo o Ministério do Meio Ambiente (MMA) e União Internacional para a Conservação da Natureza e dos Recursos Naturais (IUCN), respectivamente. Estes animais são conhecidos por sua migração entre áreas de alimentação, reprodução e nidificação, sendo o litoral Cearense utilizado principalmente na alimentação e ovoposição. Objetivo: O presente estudo visou analisar os encalhes de Chelonia mydas no litoral de Fortaleza, afim de fomentar práticas de conservação da espécie e indicar características de praias e da espécie que aumentam as chances de encalhes. Material e Métodos: Foram utilizados metadados coletados pelo Instituto Verdeluz entre 2016 e 2018, sendo eles: data, horário e local do encalhe, medidas de tamanho (largura e comprimento do casco), sexo (masculino, feminino ou indefinido), faixa etária (filhote, juvenil ou adulto) e estado do indivíduo, totalizando 48 ocorrências. Através do programa BioEstat, foram realizadas análises de distribuição e correlação entre os dados da ocorrência e as características das praias no momento do encalhe. RESULTADOS: Os resultados apontaram que fêmeas tem maior probabilidade de encalharem do que os machos e os indivíduos sexo indefinido. A localização do encalhe nas praias de Fortaleza não causa uma alteração significativa no número de encalhes, uma vez que todas possuem grau de proximidade e formações arenosas semelhantes. A maré e o tamanho do casco influenciam diretamente no número de encalhes, pois ambos dificultam a volta do animal para o mar. Conclusão: Projetos de pesquisa e conservação sobre tartarugas marinhas, como o GTAR-Verdeluz, mostram-se essenciais para a conservação da espécie, pois o conhecimento mais profundo das ameaças a espécie nos permite realizar atividades de conservação mais eficazes.

Sign in / Sign up

Export Citation Format

Share Document