Assemblage of freshwater fishes of Atlantic Forest: composition and spatial distribution (Guaraqueçaba, Paraná State, Brazil) - DOI: 10.4025/actascibiolsci.v27i2.1326

Abstract

The composition and space distribution of the fish assemblage of the Morato River (northeast of Paraná State, Brazil) were determined in this study. Data collection was carried through associating traditional techniques of fishing and direct subaqueous observation with diving techniques. After 12 monthly sampling phases were registered 30 species in 14 families being Siluriformes (43%) the group most abundant and Ancistrus multispinnis, Phalloceros caudimaculatus, Deuterodon langei and Mimagoniates microlepis the species most frequent. The Characiformes and Perciformes presented diurnal habits and the majority of the Siluriformes presented nocturnal habits. Characidium lanei, C. pterostictum and Rhamdioglanis frenatus occurred in all kind of environments on the studied stretch. In each kind of environments studied, the occupation for the fish species was predominant in the inferior portion of the water column in the middle of canal in stretch with bigger depths, sand bottom and slow rapids. The strategy of habitat occupation and occurrence were varied, delineanting the importance of the analyses of drainamage system for the conservation of this populations