Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados Neotropical Ichthyology (4) Autor Márquez,Edna Judith (4) Landínez-García,Ricardo Marcel (2) Rangel-Medrano,José David (2) García-Castro,Kevin León (1) Joya,Cristhian Danilo (1) Restrepo-Escobar,Natalia (1) Yepes-Acevedo,Anny Johanna (1) Mais... Palavra-chave Freshwater fish (4) Genetic diversity (4) Gene flow (3) Molecular marker (2) Bottleneck (1) Colombia (1) Genetic structure (1) Magdalena-Cauca basin (1) Microsatellites (1) Next generation sequencing (1) Siluriformes (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2021 (4) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última 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 Population genetics of three threatened catfish species in heterogeneous environments of the Cauca River, Colombia Neotropical Ichthyology Restrepo-Escobar,Natalia; Yepes-Acevedo,Anny Johanna; Márquez,Edna Judith. 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,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater fish; Genetic diversity; Genetic structure; Microsatellites; Siluriformes. Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100204 Development of microsatellite loci and population genetics in the bumblebee catfish species Pseudopimelodus atricaudus and Pseudopimelodus magnus (Siluriformes: Pseudopimelodidae) Neotropical Ichthyology Rangel-Medrano,José David; Márquez,Edna Judith. ABSTRACT The Neotropical freshwater catfish Pseudopimelodus atricaudus and Pseudopimelodus magnus are two recently discovered species endemic to the Colombian Magdalena-Cauca River basin. In this study, a set of 13 microsatellite loci were developed by using next generation sequence technology to assess the genetic diversity and population structure in P. atricaudus and test for cross-species amplification in P. magnus. Both species exhibited high genetic diversity (P. atricaudus: Na: 9.000 - 9.769 alleles/locus, Ho: 0.760 - 0.804, HE: 0.804 - 0.840; P. magnus: Na: 12.8 - 5.4 alleles/locus, Ho: 0.638 - 0.683, HE: 0.747 - 0.755) compared to the mean levels of genetic diversity reported for Neotropical Siluriformes, and lack of genetic differentiation among... Tipo: Info:eu-repo/semantics/article Palavras-chave: Colombia; Freshwater fish; Gene flow; Genetic diversity; Magdalena-Cauca basin. Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100205 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 Registros recuperados: 4 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco