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Juvenile and resident salmonid movement and passage through culverts
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1998-07-01
[PDF-2.32 MB]
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Abstract:An outcome of the Washington State Department of Transportation's Juvenile Fish Passage Workshop on September 24, 1997, was agreement that a literature review was necessary to determine the state of knowledge about juvenile salmonid movement and passage through culverts at road crossings. This report summarizes the findings of the literature review. the conclusion of this literature review is that stream dwelling salmonids are often highly mobile. Upstreaam movement was observed in nearly all studies that were designed to detect it, and in all species, age classes, and seasons. There are variations in the movement patterns of fish populations both between and within river systems. The role of turbulence in affecting the ability of fish to pass through culverts is poorly understood and desrves further investigation. Countersunk culverts have proved to be better for fish passage than culverts with or without other modifications for fish passage.
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