The fish assemblages from Pântano stream were studied monthly from May 2000 to June 2001 and the composition, longitudinal distribution and constancy of fish species are described. Samples were performed in three different sites, using gill nets, sieves, cast net and trawl net. Sixty-three species of 46 genera, pertaining to 18 families were identified. Characiformes with 30 species (47.62%) and Siluriformes with 22 (34.92%) were the more specious orders. Five species of Perciformes, three species of Gymnotiformes, two species of Cyprinodontiformes, and only a single Synbranchiformes species were registered.
Upper Rio Paraná; Mogi-Guaçu river basin; longitudinal distribution; freshwater fishes; seasonality
