New research out of Oregon, U.S.A, has found no negative impacts on wild steelhead (Oncorhynchus mykiss) populations from interactions with hatchery fish in the upper Clackamas River.
The American Fisheries Society published a scientific review headed by Fisheries Scientist Ian Courter of Mt. Hood Environmental, who studied 59 years of summer hatchery and winter wild steelhead runs.
Courter’s research utilized a detailed and accurate dataset where fish were individually enumerated at the North Fork Dam. By analyzing abundance data, he was able to quantify various environmental impacts on wild steelhead production, but did not find any significant negative impacts from interactions with hatchery steelhead…
Recent Comments