The University of Alberta study focused on salmon farming operations in the Broughton Archipelago, between the mainland and the northern tip of Vancouver Island. The researchers describe the area as the historic ground zero for studying the impacts of aquaculture on wild Pacific salmon.
During the past decade, salmon farmers in the area have gradually shifted the timing of anti-parasite treatments to the fall and winter months. As a result, there have been fewer sea lice in coastal waters as juvenile pink salmon migrate to sea in the spring. That may be helping populations of wild salmon recover.
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