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Artigo Produção Nacional Revisado por pares
BIBTEX RIS

Biochemical evidence of a possible new species of Neoplecostomus (Teleostei: Loricariidae) from the upper Rio Paraná basin, Brazil

2003; Elsevier BV; Volume: 32; Issue: 6 Linguagem: Inglês

10.1016/j.bse.2003.09.003

ISSN

1873-2925

Autores

Cláudio Henrique Zawadzki, Ana Liz Garcia Alves, Erasmo Renesto, Cláudio Oliveira,

Tópico(s)

Fish Ecology and Management Studies

Resumo

Neoplecostomus paranensis Langeani, 1990, from the upper Rio Parana ´, is the only Neo- plecostomus species described in this basin and is distinguished from its congeners by the lack or reduction of the adipose fin. Neoplecostomus specimens with a normal and always present adipose fin were caught in the Rio Corumba ´, upper Rio Paranabasin. In the present study two samples of populations, one from a tributary of Rio Paranapanema (identified as a typical N. paranensis) and the other from the Rio Corumbawere compared through allo- zyme electrophoresis. Six diagnostic loci were found, Acp-A, Adh-A, Est-A, Gpi-A, Ldh-A and Ldh-B. In addition, the locus Gpi-B showed significant differences between allelic frequencies for the two samples. Nei's genetic identity between the populations was 0.731. The expressive genetic divergence together with the presence of an adipose fin show that the sample from the Rio Corumbais distinct from N. paranensis and probably represents a new species.

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