Fish guidance and passage at barriers
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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 |
| Google Analytic Metrics | Metrics page |