Keratella I campaign along the middle Paraná river, I. Fishes from lenithic environments

Abstract

?«Keratella I» campaign along the middle Paraná river, I. Fishes from lenithic environments?

Fishes from twenty lenitic environments of the alluvial plain of the Middle Paraná River through 700 km length (between Diamante City (32°05?S and 60°40?W) and Paso de la Patria City (27°20?S and 58°35?W) are studied. Physical and chemical characteristics of the water bodies are given. The presence of different fish species of little and medium size are analized. From 85 taxa found, 19 belong to species in which their range is extended. Aphyocharax dentatus, Apistogramma borellii, Bunocephalus rugosus and Psellogrammus kennedyi are cited for the Middle Paraná River.