Data/hora: 02/06/2024 01:33:48

Provedor de dados: | Neotropical Ichthyology
País: | Brazil
Título: | Population genetics of three threatened catfish species in heterogeneous environments of the Cauca River, Colombia
Autores: | Restrepo-Escobar,Natalia; Yepes-Acevedo,Anny Johanna; Márquez,Edna Judith.
Data: | 2021-01-01
Ano: | 2021
Palavras-chave: | Freshwater fish; Genetic diversity; Genetic structure; Microsatellites; Siluriformes.
Resumo: | ABSTRACT Neotropical catfishes Ageneiosus pardalis, Pimelodus grosskopfii and Sorubim cuspicaudus are migratory fishes of commercial importance that exhibit decreasing populations due to overfishing and other anthropic interventions. This study used species-specific microsatellite loci to test the hypothesis that threatened fish populations show genetic vulnerability signs and are genetically structured in the middle and lower sections of the Cauca River. The studied species exhibit genetic diversity levels higher than the average values reported for Neotropical Siluriformes; however, they seem to have suffered recent bottlenecks and they present significant endogamy levels that are higher for the critically endangered catfish P. grosskopfii. Furthermore, both Ageneiosus pardalis and S. cuspicaudus are each formed by one genetic group, while Pimelodus grosskopfii comprises two coexisting genetic groups. The information obtained in this study is useful for the decision making in management plans that are appropriate for the sustainability of these three species populations within the proposal for the expansion of the hydroelectric development and other anthropic activities.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100204
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/1982-0224-2020-0040
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.19 n.1 2021
Fonte: | info:eu-repo/semantics/openAccess