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Population structure of the endangered green turtles in a feeding ground in Brazilian Northeast: insights for conservation strategies

Published online by Cambridge University Press:  12 February 2025

Daniel Solon Dias de Farias Open the ORCID record for Daniel Solon Dias de Farias [Opens in a new window] ,
Roberta Ramblas Zamana Open the ORCID record for Roberta Ramblas Zamana [Opens in a new window] ,
Aline da Costa Bomfim Ventura Open the ORCID record for Aline da Costa Bomfim Ventura [Opens in a new window] ,
Flávio José de Lima Silva Open the ORCID record for Flávio José de Lima Silva [Opens in a new window] ,
Simone Almeida Gavilan Open the ORCID record for Simone Almeida Gavilan [Opens in a new window] ,
Vinícius Gabriel da Silva Santana Open the ORCID record for Vinícius Gabriel da Silva Santana [Opens in a new window] ,
Igor Peres Puertas Open the ORCID record for Igor Peres Puertas [Opens in a new window] ,
Marco Aurélio Gattamorta Open the ORCID record for Marco Aurélio Gattamorta [Opens in a new window] ,
Eliana Reiko Matushima Open the ORCID record for Eliana Reiko Matushima [Opens in a new window]  and
Viviane Souza do Amaral Open the ORCID record for Viviane Souza do Amaral [Opens in a new window]
Daniel Solon Dias de Farias*
Affiliation:
Programa de Doutorado em Desenvolvimento e Meio Ambiente – DDMA, Universidade Federal do Rio Grande do Norte (UFRN), CEP 59075-000, Natal/RN, Brazil Projeto Cetáceos da Costa Branca – Universidade do Estado do Rio Grande do Norte (PCCB-UERN), Campus Central, CEP 59600-000, Mossoró/RN, Brazil Centro de Estudos e Monitoramento Ambiental (CEMAM), CEP 59655-000, Areia Branca/RN, Brazil Laboratório de Morfofisiologia de Vertebrados, Departamento de Morfologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), CEP 59075-000, Natal/RN, Brazil
Roberta Ramblas Zamana
Affiliation:
Centro de Estudos e Monitoramento Ambiental (CEMAM), CEP 59655-000, Areia Branca/RN, Brazil Laboratório de Patologia Comparada de Animais Selvagens (LAPCOM), Departamento de Patologia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, CEP 05508-270, São Paulo/SP, Brazil
Aline da Costa Bomfim Ventura
Affiliation:
Programa de Doutorado em Desenvolvimento e Meio Ambiente – DDMA, Universidade Federal do Rio Grande do Norte (UFRN), CEP 59075-000, Natal/RN, Brazil Projeto Cetáceos da Costa Branca – Universidade do Estado do Rio Grande do Norte (PCCB-UERN), Campus Central, CEP 59600-000, Mossoró/RN, Brazil Centro de Estudos e Monitoramento Ambiental (CEMAM), CEP 59655-000, Areia Branca/RN, Brazil Laboratório de Morfofisiologia de Vertebrados, Departamento de Morfologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), CEP 59075-000, Natal/RN, Brazil
Flávio José de Lima Silva
Affiliation:
Projeto Cetáceos da Costa Branca – Universidade do Estado do Rio Grande do Norte (PCCB-UERN), Campus Central, CEP 59600-000, Mossoró/RN, Brazil Centro de Estudos e Monitoramento Ambiental (CEMAM), CEP 59655-000, Areia Branca/RN, Brazil
Simone Almeida Gavilan
Affiliation:
Projeto Cetáceos da Costa Branca – Universidade do Estado do Rio Grande do Norte (PCCB-UERN), Campus Central, CEP 59600-000, Mossoró/RN, Brazil Centro de Estudos e Monitoramento Ambiental (CEMAM), CEP 59655-000, Areia Branca/RN, Brazil Laboratório de Morfofisiologia de Vertebrados, Departamento de Morfologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), CEP 59075-000, Natal/RN, Brazil
Vinícius Gabriel da Silva Santana
Affiliation:
Programa de Doutorado em Desenvolvimento e Meio Ambiente – DDMA, Universidade Federal do Rio Grande do Norte (UFRN), CEP 59075-000, Natal/RN, Brazil Projeto Cetáceos da Costa Branca – Universidade do Estado do Rio Grande do Norte (PCCB-UERN), Campus Central, CEP 59600-000, Mossoró/RN, Brazil Centro de Estudos e Monitoramento Ambiental (CEMAM), CEP 59655-000, Areia Branca/RN, Brazil
Igor Peres Puertas
Affiliation:
Laboratório de Anfíbios e Répteis, Departamento de Botânica e Zoologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), CEP 59075-000, Natal/RN, Brazil Laboratório de Estudos para a Pesca Responsável, Núcleo de Recursos Renováveis, Instituto de Oceanografia, Universidade Federal do Rio Grande (FURG), CEP 96203-900, Rio Grande/RS, Brazil
Marco Aurélio Gattamorta
Affiliation:
Laboratório de Patologia Comparada de Animais Selvagens (LAPCOM), Departamento de Patologia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, CEP 05508-270, São Paulo/SP, Brazil Aquário Municipal de Santos, Santos/SP, Brazil
Eliana Reiko Matushima
Affiliation:
Laboratório de Patologia Comparada de Animais Selvagens (LAPCOM), Departamento de Patologia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, CEP 05508-270, São Paulo/SP, Brazil
Viviane Souza do Amaral
Affiliation:
Programa de Doutorado em Desenvolvimento e Meio Ambiente – DDMA, Universidade Federal do Rio Grande do Norte (UFRN), CEP 59075-000, Natal/RN, Brazil Laboratório de Genética Toxicológica, Departamento de Biologia e Genética, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), CEP 59075-000, Natal/RN, Brazil
*
Corresponding author: Daniel Solon Dias de Farias; Email: [email protected]
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Abstract

Understanding the population structure and genetic diversity of green turtles is crucial for effective conservation. This study investigated the occurrence, genetic composition, and potential origins of green turtles (Chelonia mydas) in the Potiguar Basin, northeastern Brazil, based on stranding data from 2010 to 2019. Analysis revealed that 87.36% of the population consisted of juveniles, primarily females with a curved carapace length (CCL) between 30 and 59.9 cm. Genetic analysis of the mtDNA control region (481 bp, n = 39) revealed eight haplotypes, with CM-A8 (48.7%) and CM-A5 (30.8%) being the most common. This may be related to the geographic position of the Potiguar Basin, located in the ‘corner’ of the South American continent. High haplotype diversity and low nucleotide diversity were observed, consistent with other Brazilian foraging grounds. Mixed stock analysis identified Ascension Island as the primary source population, followed by Guinea-Bissau and Surinam. The results highlight the importance of the Potiguar Basin as a foraging area for green turtles and emphasize the need for comprehensive conservation strategies to protect this vulnerable population.

Keywords

conservation geneticsecologyendangered speciessea turtles
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 105 , 2025 , e18
Copyright
Copyright © The Author(s), 2025. Published by Cambridge University Press on behalf of Marine Biological Association of the United Kingdom

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