Cytogenetic characterization of the strongly electric Amazonian eel, Electrophorus electricus (Teleostei, Gymnotiformes), from the Brazilian rivers Amazon and Araguaia
Carregando...
Data
2008-01-01
Autores
Fonteles, Soraia B.A.
Lopes, Carlos E.
Akama, Alberto
Fernandes, Flora M.C.
Porto-Foresti, Fábio [UNESP]
Senhorini, José A.
Daniel-Silva, Maria de Fátima Z.
Foresti, Fausto [UNESP]
Almeida-Toledo, Lurdes Foresti de
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Genética
Resumo
A karyotype analysis of the electric eel, Electrophorus electricus (Teleostei, Gymnotiformes), a strongly electric fish from northern South America, is presented. Two female specimens were analyzed, one from the Amazon River and one from the Araguaia River. The specimens had a chromosomal number of 2n = 52 (42M-SM + 10A). C-bands were present in a centromeric and pericentromeric position on part of the chromosomes; some interstitial C-bands were also present. Heteromorphic nucleolus organizer regions (NORs) were detected in two chromosome pairs of the specimen from the Amazon River. The chromosome number and karyotype characteristics are similar to those of other Gymnotidae species. The genera Electrophorus and Gymnotus are positioned as the basal lineages in the Gymnotiformes phylogeny.
Descrição
Palavras-chave
chromosome, fish, Gymnotidae, electric eel
Como citar
Genetics and Molecular Biology. Sociedade Brasileira de Genética, v. 31, n. 1, p. 227-230, 2008.