%0 Journal Article
%T The fish fauna of the Jacar¨¦-Gua£¿u River basin, Upper Paran¨¢ River basin
%A Esgu¨ªcero
%A Andr¨¦ Luiz Henr¨ªques
%A Arcifa
%A Marlene Sofia
%J Biota Neotropica
%D 2011
%I Scientific Electronic Library Online
%R 10.1590/S1676-06032011000100010
%X this study aimed to evaluate the fish fauna composition and distribution in different environments, up- and downstream the gavi£¿o peixoto dam, in the jacar¨¦-gua£¿u river basin. most of the sampled ichthyofauna is autochthonous, and the majority of the species belongs to the orders characiformes and siluriformes. the order characiformes comprised most of the specimens caught, astyanax altiparanae being the most abundant species. all the studied environments were characterized by the massive occurrence of accidental species and low similarity between their ichthyofauna. in general, a greater number of species and higher values of the diversity index were observed downstream of the dam. the fish diversity in the studied habitats was positively correlated with the water body depth, and negatively correlated with the water conductivity. this last correlation may be an indicative of the negative influence of the pollution of the jacar¨¦-gua£¿u basin on the local fish fauna.
%K neotropical fishes
%K stream ecology
%K communities' structure
%K freshwater fishes
%K environmental degradation.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1676-06032011000100010&lng=en&nrm=iso&tlng=en