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Freshwater aspects of anadromous salmonid enhancement

January 1, 1982

Freshwater enhancement of anadromous salmonid populations has been practiced in the United States and Canada since the late 1800's. Reduction of natural spawning habitat and increasing fishing pressure make artificial enhancement a possible alternative to declining populations.

Enhancement of anadromous salmonids involved improvement of the natural environment and reducing natural mortality. Methods of enhancement include fishways, spawning and rearing channels, stream rehabilitation, lake fertilization, environmental management, and artificial propagation techniques.

Five Pacific salmon species and steelhead trout are commonly enhanced, primarily in watershed entering the Pacific Ocean and Great Lakes. Enhancement efforts contribute heavily to a commercial and sport industry realizing over $1.5 billion.

Citation Information

Publication Year 1982
Title Freshwater aspects of anadromous salmonid enhancement
Authors Rowan W. Gould
Publication Type Report
Publication Subtype Federal Government Series
Series Title NOAA Technical Report NMFS Circular
Series Number 447
Index ID 70006615
Record Source USGS Publications Warehouse
USGS Organization Leetown Science Center