Fish guidance and passage at barriers

By:  and 
Edited by: Paolo Domenici and B. G. Kapoor

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Abstract

Habitat fragmentation resulting from human activities is a major factor contributing to reductions in biodiversity and species abundance worldwide. When movements are restricted, subpopulations become isolated, leading to reduced breeding opportunities, inbreeding depression, and interruption of key life stages. This problem is particularly ubiquitous in riverine ecosystems, where dams, water diversions, culverts, and other structures create barriers to movements of aquatic organisms. Fragmentation and obstacles to movement can be a natural and important part of riverine ecosystems. The challenge of fish passage is to mitigate for the effects of the barriers by providing passage routes that are both safe and effective. Fish passage technology would greatly benefit from more research on the associations between hydraulics and other environmental stimuli and rheotaxis in migratory fish. Migratory delay, poor attraction, fallback and stalling within fishways, and both immediate and delayed passage-induced mortality are common problems identified for a range of fishway types and taxa.

Publication type Book chapter
Publication Subtype Book Chapter
Title Fish guidance and passage at barriers
DOI 10.1201/b10190-3
Year Published 2010
Language English
Publisher CRC Press
Contributing office(s) Leetown Science Center
Description 28 p.
Larger Work Type Book
Larger Work Subtype Monograph
Larger Work Title Fish locomotion: An eco-ethological perspective
First page 62
Last page 89
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