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	Provedor de dados Neotropical Ichthyology (2) Autor Landínez-García,Ricardo Marcel (2) Márquez,Edna Judith (2) García-Castro,Kevin León (1) Joya,Cristhian Danilo (1) Rangel-Medrano,José David (1) Palavra-chave Freshwater fish (2) Gene flow (2) Genetic diversity (2) Molecular marker (2) Bottleneck (1) Next generation sequencing (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2021 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Population genetics of the endangered catfish Pseudoplatystoma magdaleniatum (Siluriformes: Pimelodidae) based on species-specific microsatellite loci Neotropical Ichthyology García-Castro,Kevin León; Rangel-Medrano,José David; Landínez-García,Ricardo Marcel; Márquez,Edna Judith. ABSTRACT The Neotropical catfish genus Pseudoplatystoma comprises eight species of large size, widely distributed in South American basins. The endangered species P. magdaleniatum is endemic to Magdalena basin (Colombia), experiences high fishing pressure and its population genetics is relatively unknown. To study the genetic status and structure of P. magdaleniatum, 25 species-specific polymorphic microsatellite loci were developed using next-generation sequencing and then tested in samples collected in the Magdalena-Cauca basin. Based on 15 of these loci, P. magdaleniatum showed a high number of alleles per locus (9-10), high values of observed (0.762-0.798) and expected (0.770-0.791) heterozygosities, recent reduction of population size and gene flow.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Bottleneck; Freshwater fish; Gene flow; Genetic diversity; Molecular marker. Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100215 Development of microsatellite loci and population genetics of the catfish Pimelodus yuma (Siluriformes: Pimelodidae) Neotropical Ichthyology Joya,Cristhian Danilo; Landínez-García,Ricardo Marcel; Márquez,Edna Judith. ABSTRACT Pimelodus yuma (formerly Pimelodus blochii) is a freshwater fish, endemic to the Colombian Magdalena-Cauca and Caribbean basins that experiences habitat disturbances resulting from anthropogenic activities. Due to the lack of information about the population genetics of this species, this study developed 14 species-specific microsatellite loci to assess the genetic diversity and population structure of samples from the lower section of the Cauca River. The studied species showed genetic diversity levels higher than the average values reported for Neotropical Siluriformes and significant inbreeding levels as was described for some congeners. Furthermore, P. yuma comprises two coexisting genetic groups that exhibit gene flow along the lower section... Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater fish; Genetic diversity; Gene flow; Molecular marker; Next generation sequencing. Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100209 Registros recuperados: 2 Primeira ... 1 ... Última

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