Genetic diversity in two threatened species of guitarfish (Elasmobranchii: Rhinobatidae) from the Brazilian and Argentinian coasts: An alert for conservation

The guitarfishes Pseudobatos horkelii and Pseudobatos percellens meet the criteria for threatened status as Critically Endangered (CR) and Endangered (EN), respectively. Both species occur in the Southern Atlantic Ocean. Considering the lack of data on the genetic structure of these species, the pre...

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Detalles Bibliográficos
Autores: Cruz, Vanessa P. [UNESP], Adachi, Aisni M.C. L. [UNESP], Oliveira, Pablo H. [UNESP], Ribeiro, Giovana S. [UNESP], Paim, Fabilene G. [UNESP], Souza, Bruno C. [UNESP], Rodrigues, Alexandre S. F. [UNESP], Vianna, Marcelo, Delpiani, Sergio M., de Astarloa, Juan Martín Díaz, Rotundo, Matheus M., Mendonça, Fernando F. [UNESP], Oliveira, Claudio [UNESP], Lessa, Rosangela P., Foresti, Fausto [UNESP]
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:Brasil
Institución:Universidade Estadual Paulista (UNESP)
Repositorio:Repositório Institucional da UNESP
Idioma:inglés
OAI Identifier:oai:repositorio.unesp.br:11449/229212
Acceso en línea:http://dx.doi.org/10.1590/1982-0224-2021-0012
http://hdl.handle.net/11449/229212
Access Level:acceso abierto
Palabra clave:D-loop
Endangered species
Populations
Pseudobatos horkelii
Pseudobatos percellens
Descripción
Sumario:The guitarfishes Pseudobatos horkelii and Pseudobatos percellens meet the criteria for threatened status as Critically Endangered (CR) and Endangered (EN), respectively. Both species occur in the Southern Atlantic Ocean. Considering the lack of data on the genetic structure of these species, the present study evaluated the genetic variability and population structure of the P. horkelii and P. percellens in the southern region of Brazil and the northern coast of Argentina, based on sequences of mitochondrial DNA, Control Region (D-loop). Samples of P. horkelii (n = 135) were analyzed in six localities situated in Northern Argentina, along the Brazilian states’ coast. The mean of nucleotide diversity was 0.0053, the ΦST was 0.4277 and demographic analysis of P. horkelii suggests the existence of stability of the populations, with D = 0.9929, FS = 2.0155, SSD = 0.0817, R = 0.2153. In P. percellens (n = 101) were analyzed from six Brazilian localities along the coast of Santa Catarina, Paraná, and São Paulo. The mean nucleotide diversity was 0.0014 and ΦST value of 0.2921, the demographic analysis indicates a high migration rate of P. percellens among the localities evaluated, with D = 0.5222, FS = 0.3528, SSD = 0.01785, R = 0.3890.

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