Fishing Modification Due To Dam, Pollution And Introduction Fish Species
In The Tietê River, SP, Brazil
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
Keywords
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