THE EFFECT OF ARTIFICIAL INCREASES IN WATER CONDUCTIVITY ON THE EFFICIENCY OF ELECTRIC FISHING IN TROPICAL STREAMS (PARANA, BRAZIL)

Authors
PENCZAK T AGOSTINHO AA GLOWACKI L GOMES LC
Citation
T. Penczak et al., THE EFFECT OF ARTIFICIAL INCREASES IN WATER CONDUCTIVITY ON THE EFFICIENCY OF ELECTRIC FISHING IN TROPICAL STREAMS (PARANA, BRAZIL), Hydrobiologia, 350, 1997, pp. 189-201
Citations number
21
Categorie Soggetti
Marine & Freshwater Biology
Journal title
Hydrobiologia → ACNP
ISSN journal
00188158
Volume
350
Year of publication
1997
Pages
189 - 201
Database
ISI
SICI code
0018-8158(1997)350:<189:TEOAII>2.0.ZU;2-K
Abstract
Four sites in three small tropical streams each were sampled with thre e successive electrofishings per constant unit effort, starting at the site with lowest natural water conductivity. Each second-fourth site was sampled at double water conductivity (up to 300 mu S cm(-1) only) by dissolving salt in the water. Electric fishing efficiency estimated by three efficiency indexes was not significantly correlated with inc reasing conductivity. The reasons for this result are discussed.