Composition and diversity of immatures of Chironomidae (Insecta, Diptera) at Peixes’s River, Dois Córregos, SP

Abstract

This study it had as objective to analyze, qualitatively and quantitatively, the community of immature of Chironomidae present at Peixes’s River, Dois Córregos, SP, correlating it with the ambient conditions of the sampling points, determining its composition and diversity. In April of 2003, the collections had been carried through in four points and the sediment was showed with the aid of one drags of Ekman-Birge. The results had shown that the genders of Chironomidae, with bigger abundance, at Peixes’s River, (except Chironomus), are associates the arenaceous substrata, what in this in case that, could be related, with the silting process, caused for the deforestation present in almost all the extension of the river.