Cytogenetic characterization of the strongly electric Amazonian eel, Electrophorus electricus (Teleostei, Gymnotiformes), from the Brazilian rivers Amazon and Araguaia

AUTOR(ES)

Fonteles, Soraia B.A., Lopes, Carlos E., Akama, Alberto, Fernandes, Flora M.C., Porto-Foresti, Fábio, Senhorini, José A., Daniel-Silva, Maria de Fátima Z., Foresti, Fausto, Almeida-Toledo, Lurdes Foresti de

FONTE

Genetics and Molecular Biology

DATA DE PUBLICAÇÃO

2008

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.

Documentos Relacionados

• Theileria electrophorin.sp., a parasite of the electric eel Electrophorus electricus (Osteichthyes: Cypriniformes: Gymnotidae) from Amazonian Brazil
• Isolation and characterization of a monoclonal antibody against the saxitoxin-binding component from the electric organ of the eel Electrophorus electricus.
• Systematics and biogeography of Sternarchellini (Gymnotiformes: Apteronotidae): Diversification of electric fishes in large Amazonian rivers
• The cytoskeleton of the electric tissue of Electrophorus electricus, L.
• Purification and Characterization of Acetylcholine Receptor-I from Electrophorus electricus