Consulta: subjectFacets:"Cave fish"
Registros recuperados: 2
Data/hora: 12/06/2024 14:27:43

Cytogenetic and molecular analyses in troglobitic and epigean species of Pimelodella (Siluriformes: Heptapteridae) from Brazil
Provedor de dados: Neotropical Ichthyology
Autores: Dazzani,Bianca; Garcia,Caroline; Peixoto,Marilena; Trajano,Eleonora; Almeida-Toledo,Lurdes Foresti de.
Samples from seven different locations of the genus Pimelodella were genetically examined, two caves (exclusively subterranean, upper Tocantins River and São Francisco River) and five epigean (from upper Paraná River basin). Cytogenetic analyses revealed the same diploid number (2n=46) for all species besides similarities in both number and location of nucleolar organizer regions and C bands. FISH with 5S rDNA probes and CMA3 staining indicated significant differences among the studied species. Application of PCR-RFLP in ATPase 6 and 8 mitochondrial genes allowed building a minimum evolution phenogram identifying the close evolutionary relationship among groups. Both chromosomal and molecular data were useful to infer the relationships among studied...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cave fish; Cytogenetics; Evolutionary relationships; FISH; PCR-RFLP.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000300016

Differentiating cave Aspidoras catfish from a karst area of Central Brazil, upper rio Tocantins basin (Siluriformes: Callichthyidae)
Provedor de dados: Neotropical Ichthyology
Autores: Secutti,Sandro; Reis,Roberto E; Trajano,Eleonora.
Two cave populations of Aspidoras albater catfish with reduced eyes and pigmentation were recently found near the city of Posse, São Domingos karst area, Goiás State, representing the first known case of a troglomorphic callichthyid catfish. Cave specimens are described and compared to epigean specimens of A. albater, but morphometric differences between the epigean and the cave populations are not adequate to delimit as distinct species.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aspidoras albater; Cave fish; Goiás State; Neotropical; Population differentiation.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000400001