Population structure of the critically endangered Brazilian guitarfish Pseudobatos horkelii (Rhinobatidae) revealed by double-digest restriction site-associated DNA sequencing

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Autor(es): dc.contributorUniversidade Federal do Ceará-
Autor(es): dc.contributorUNISANTA-
Autor(es): dc.contributorUniversidade Federal do Rio de Janeiro (UFRJ)-
Autor(es): dc.contributorRio de Janeiro Aquarium Research Center-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorTorres, Yan-
Autor(es): dc.creatorRotundo, Matheus Marcos-
Autor(es): dc.creatorVianna, Marcelo-
Autor(es): dc.creatorCharvet, Patricia-
Autor(es): dc.creatorFaria, Vicente Vieira-
Autor(es): dc.creatorOliveira, Claudio-
Autor(es): dc.creatorForesti, Fausto-
Autor(es): dc.creatorCruz, Vanessa Paes-
Data de aceite: dc.date.accessioned2025-08-21T15:57:06Z-
Data de disponibilização: dc.date.available2025-08-21T15:57:06Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2023-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/aqc.4035-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/298918-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/298918-
Descrição: dc.descriptionMolecular analysis is a powerful tool for assessing and developing conservation strategies for endangered species. Elasmobranchs comprise one of the most threatened groups of vertebrates, with about one-third of the species subject to some degree of threat. This is the case for Pseudobatos horkelii, the Brazilian guitarfish, which has suffered severe population reductions (>80%) in recent decades, mainly through coastal overfishing. Understanding the genetic diversity of this species is paramount to applying adequate management and conservation strategies. In this context, the present study evaluated the genetic diversity of P. horkelii, employing single-nucleotide polymorphism (SNP) nuclear markers obtained by double-digest restriction site-associated DNA sequencing (ddRADseq). Samples collected in three areas along the Brazilian Coast (Rio de Janeiro, São Paulo, and Rio Grande do Sul) provided an average of 1,565,339 reads and 2,846 SNPs. The results indicate the presence of at least two genetically distinct populations along the Brazilian Coast, with molecular diversity differences noted among clusters. The heterozygosity excess observed in all populations is likely the result of a bottleneck, probably resulting from overfishing and habitat fragmentation. Moreover, the upwelling phenomenon in Cabo Frio, in the state of Rio de Janeiro, may have a significant influence over the observed genetic structure. The gene flow between the clusters was estimated and was noted as asymmetric between the populations studied. The observed patterns may be the result of the combination of biological characteristics and overfishing pressure in the past decades. The evidence of structured populations presenting genetic diversity differences provides insightful information for the development of stock management and conservation strategies for the Brazilian guitarfish.-
Descrição: dc.descriptionFundação Cearense de Apoio ao Desenvolvimento Científico e Tecnológico-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionMarine Vertebrate Evolution and Conservation Lab – EvolVe Departamento de Biologia Universidade Federal do Ceará, Ceará-
Descrição: dc.descriptionAcervo Zoológico da Universidade Santa Cecília (AZUSC) Universidade Santa Cecília UNISANTA, São Paulo-
Descrição: dc.descriptionLaboratório de Biologia e Tecnologia Pesqueira Universidade Federal do Rio de Janeiro UFRJ, Rio de Janeiro-
Descrição: dc.descriptionIMAM – AquaRio Rio de Janeiro Aquarium Research Center, Rio de Janeiro-
Descrição: dc.descriptionLaboratório de Biologia e Genética de Peixes Instituto de Biociências de Botucatu Universidade Estadual Paulista (UNESP), São Paulo-
Descrição: dc.descriptionLaboratório de Biologia e Genética de Peixes Instituto de Biociências de Botucatu Universidade Estadual Paulista (UNESP), São Paulo-
Descrição: dc.descriptionCNPq: 426365/2018-6-
Idioma: dc.languageen-
Relação: dc.relationAquatic Conservation: Marine and Freshwater Ecosystems-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectconservation-
Palavras-chave: dc.subjectelasmobranchs-
Palavras-chave: dc.subjectgenetics-
Palavras-chave: dc.subjectgenomic-
Palavras-chave: dc.subjectSNPs-
Palavras-chave: dc.subjectthreatened species-
Título: dc.titlePopulation structure of the critically endangered Brazilian guitarfish Pseudobatos horkelii (Rhinobatidae) revealed by double-digest restriction site-associated DNA sequencing-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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