Data/hora: 10/06/2024 10:05:05

Provedor de dados: | 74
País: | Brazil
Título: | Cytogenetic study of the giant otter Pteronura brasiliensis Zimmermann 1780 (Carnivora, Mustelidae, Lutrinae)
Autores: | Franco-de-Sá,Jorge Felipe Oliveira; Rosas,Fernando César Weber; Feldberg,Eliana.
Data: | 2007-01-01
Ano: | 2007
Palavras-chave: | Amazon; Aquatic mammals; Ariranha; Karyotype.
Resumo: | The giant otter, Pteronura brasiliensis Zimmermann 1780 (Carnivora, Mustelidae, Lutrinae), was widely distributed in South America but stable populations are now only found in the Pantanal and Amazon regions and the species is classified as endangered. There is only one recognized species of giant otter, although two subspecies of doubtful value have also been cited in the literature. We present the first karyotype of four captive P. brasiliensis specimens, all of which posses 2n = 38 chromosomes as 14M+8SM+6ST+8A and one pair of sexual chromosomes. An heteromorphic secondary constriction, associated with the nucleolar organizer region (NOR), was seen on the long arms of chromosome pair 17. The C-banding technique revealed heterochromatin in the centromeric region of all the chromosomes and the NOR was C-banding positive. The giant otter presented the same diploid number as most mustelids, although its karyotype is quite species-specific.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600011
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572007000600011
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.30 n.4 2007
Fonte: | info:eu-repo/semantics/openAccess