Author(s)

W. S. Smith, E. L. G. Espíndola, M. Petrere Jr. & O. Rocha

Abstract

Fishing modification due to dam, pollution and introduction fish species in the TietE River, SP, Brazil W. S. smith1, E. L. G. ~s~indolal, M. Petrere ~ r . ~ & 0. ~ o c h a ~ I Centro de Recursos Hidricos e Ecologia Aplicada (USP), Brazil. 2 Depavtamento de Ecologia, UNESP, Rio Claro, Brazil. 3 Departamento de Biologia Evolutiva, UFSCar, Brazil. Abstract The aim of the present study is to examine the modification on fishing in the Tiete river in consequence of pollution, damming up and of introduction of species. The results revealed modification on utilization of fishing equipment. Before the dam used innumerous equipment such as gillnets, cast net and long line, etc. After the dam, dominated the gillnets and cast net. Another important point is the reduction on professional fishing and the increase of sport fishing in consequence of the reduced fish catching and of the biggest profit of other activities. A clear change in the composition of fish caught during long years was observed, with th

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