Clayoquot Salmon with lice

Clayoquot emergency drug trial

Norwegian salmon farming giant Cermaq has a salmon lice problem on their Clayoquot Sound salmon farms. Documents released through Access to Information indicate Cermaq obtained an Emergency Drug Release to use the insecticide Lufenuron to control salmon lice in the Clayoquot Sound UNESCO Biosphere Region.

Last year saw salmon lice numbers in Clayoquot spike to levels never before seen in British Columbia, up to 55 lice per farmed fish—eighteen times the threshold for treatment set out by Department of Fisheries (DFO). Independent monitoring found wild salmon juveniles had lice counts as high as 50 per fish.

Cermaq is unable to control their salmon lice epidemic in Clayoquot Sound. Their 2018 lice outbreak likely devastated last year’s wild salmon cohort, and their 2019 numbers are already up to 5 times the DFO limit, right at the beginning of the wild salmon out-migration window.

Wild juvenile Chum salmon loaded with salmon lice

Clayoquot salmon lice outbreak devastating

A massive outbreak of salmon lice in the Clayoquot Sound UNESCO Biosphere Reserve is threatening to wipe out this year’s salmon runs. Cermaq’s documentation on salmon lice for April show that the numbers of salmon lice on seven of their fourteen Clayoquot farm sites are up to ten times higher than the threshold which requires treatment. The regulatory threshold is three motile salmon lice per farm fish.

There are 20 open net-pen salmon farms in Clayoquot Sound, all located on wild salmon migration routes. The salmon lice outbreak is occurring as wild salmon smolts are leaving Clayoquot’s rivers to begin their life at sea.