New research suggests salmon farms and sea lice are the main cause of a 7-fold decrease in coho productivity in the Broughton Archipelago

New research suggests salmon farms and sea lice are the main cause of a 7-fold decrease in coho productivity in the Broughton Archipelago

Two new sea lice papers published online in the Journal of Applied Ecology suggest that sea lice from salmon farms may be dramatically affecting the health of coho salmon populations in the Broughton Archipelago. The first paper, co-sponsored by Watershed Watch Salmon Society, indicates that sea lice transmitted from pink salmon prey to coho predators increased infection on coho by 2 to 3 fold in salmon farming areas. The second paper, which looked at coho salmon returns from 1975-2007, found that infected coho in the Broughton Archipelago suffered a 7-fold decrease in productivity during a period of recurrent sea louse infestations associated with salmon farms, relative to unexposed coho populations.

PDF: New research suggests salmon farms and sea lice are the main cause of a 7-fold decrease in coho productivity in the Broughton Archipelago

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