Data from fish farms around Vancouver Island show sea lice numbers exceeding Fisheries and Oceans Canada’s requirements of three per salmon at the start of this year’s juvenile salmon migration.
A major B.C. salmon-farm operator will soon be testing a new containment system designed to prevent sea lice and algae from entering pens and hopefully reduce the chances of fish escapement. Cermaq Canada is assembling the structure, known as a semi-closed containment system (SCCS), in Port Alberni and plans to stock it with Atlantic salmon later this fall for trials at its Millar Channel farm in Clayoquot Sound.
The results of a new wild salmon study are skin crawling: 94 per cent of wild salmon fry in the Discovery Islands — to the east of Campbell River — had sea lice attached. The infected fry hosted an average of seven of the parasitic lice.
Canada’s $2 billion Aquaculture industry is embroiled in controversy. While there may be some debate as to whether wild salmon spread more infections to British Columbia’s penned stock or vice versa,[1] there have been incidents like the Queen Charlotte Strait’s 2015 sea lice epidemic.[2] On May 20, 2016, Dr Kristi Miller, from Fisheries and Oceans Canada, announced that there is “a potential Heart and Skeletal Muscle Inflammation (HSMI) in farmed Atlantic salmon samples” collected from a aquaculture facility off the coast of Vancouver Island. In Norway, where HSMI is more common, this disease is “associated with generally low mortality on farms, generally between 0 to 20%.”[3] The stress (and thus mortality rate) is undoubtedly greater on wild salmon, which need to capture prey, escape predators and swim upstream to spawn. So, acting on behalf of marine biologist Alexandra Morton, ECOjustice is suing Canada’s Ministry of Fisheries for putting wild salmon at risk. Some argue the best answer is to bring salmon farms on land.