NEWS RELEASE: February 8, 2011 (press embargo ending at 2 p.m. PST on Tuesday, Feb 8th)
Sidney, B.C. – A new study published today in the journal Public Library of Science ONE by researchers from Raincoast Conservation Foundation, Watershed Watch Salmon Society, and the Universities of Victoria and Simon Fraser provides the first link between salmon farms and elevated levels of sea lice on juvenile Fraser River sockeye salmon.The article, Sea Louse Infection of Juvenile Sockeye Salmon in Relation to Marine Salmon Farms on Canada’s West Coast, genetically identified 30 distinct stocks of infected Fraser sockeye that pass by open net-pen salmon farms in the Strait of Georgia, including the endangered Cultus Lake stock. The study found that parasitism of Fraser sockeye increased significantly after the juvenile fish passed by fish farms. These same species of lice were found in substantial numbers on the salmon farms.
Not only did juvenile Fraser sockeye host higher lice levels in the Georgia Strait after they passed salmon farms, these fish hosted an order of magnitude more sea lice than Skeena and Nass River sockeye that migrated along the north coast where there are no farms. “The implications of these infections are not fully clear, but in addition to any direct physical and behavioural impacts on juvenile sockeye, sea lice may also serve as vectors of disease or indicators of other farm-origin pathogens” said Michael Price, lead author.
The data further showed that the differences in infection level for one species of louse in relation to fish farm exposure could not be explained by differences in salinity or temperature. “Given the high intensities of lice observed on some juveniles in this study—up to 28 lice/fish— there’s an urgent need to understand the extent of threat posed by sea lice to juvenile Fraser River sockeye” said Dr. Craig Orr, a co-author of the study.
The study also recorded the highest lice levels on juvenile sockeye near a farmed salmon processing plant in the Georgia Strait, heightening concern for the full potential impact of the salmon farm industry on wild salmon in this region.
Sea lice from salmon farms are likely another stressor for sockeye already subjected to multiple human impacts. Importantly, however, risks to juvenile sockeye from open net-pen salmon farms can be much more easily mitigated than changes to ocean conditions from climate change and ocean acidification. Options already recommended include removal of farm salmon from the migration routes of juvenile sockeye, and transition of salmon farms to closed-containment facilities.
Sea Louse Infection of Juvenile Sockeye Salmon in Relation to Marine Salmon Farms on Canada’s West Coast list of authors:
Michael HH Price (1,2) Stan L Proboszcz(3), Rick D Routledge(4), Allen S Gottesfeld(5), Craig Orr(3), John D Reynolds(4)
1 Department of Biology, University of Victoria, Victoria, BC, Canada
2 Raincoast Conservation Foundation, Sidney, BC, Canada
3 Watershed Watch Salmon Society, Coquitlam, BC, Canada
4 Simon Fraser University, Burnaby, BC, Canada
5 Skeena Fisheries Commission, Hazelton, BC, Canada
To view the study, visit:
http://dx.plos.org/10.1371/journal.pone.0016851
For more information contact:
Michael Price
Raincoast Conservation Foundation (www.raincoast.org) / University of Victoria
pricem@uvic.ca (250-847-1519)
Dr. Craig Orr
Watershed Watch Salmon Society (www.watershed-watch.org) – member group of the
Coastal Alliance for Aquaculture Reform
corr@telus.net
(604-809-2799)
Relevant photos and B-roll available.
Both Raincoast Conservation Foundation and Watershed Watch Salmon Society are part of the Conservation Coalition – a participant group of the Cohen Commission of Inquiry into the Decline of Sockeye Salmon in the Fraser River.
Tags: fish farms impact wild salmon, sea lice from fish farms spread to Fraser Sockeye, sea lice infect Fraser sockeye
Thank you for this study. It’s amazing DFO didn’t do it years ago. It’s too bad they side with promoting short-term industry growth at any cost, rather than creating a sustainable fishery that will last forever.
DFO mismanaged the Atlantic cod fishery, and now they’re mismanaging the Pacific salmon industry.
Department of Fisheries and Oceans is an embarrassment to Canadians.
Congratulations on the publication.
It shall be interesting to examine the reaction to this excellent salvo.
I agree with Ben about the DFO, Atlantic Cod and the Pacific Salmon.
The question is why?
Could it be that DFO plans to destroy the Pacific Salmon, and the fishing industry, to make way for offshore drilling and tanker traffic? DFO and sustainability is way too logical and sane a proposition for a canadian government agency.
The solution to the farmed salmon problems is rather simple to solve. Put the farms on land and take them completely out of the ocean.
I can’t agree with Ben about DF0 being an embarrassment; DF0 is a vile disgrace of canada and of Canadians.
Let me get this straight. A group of anti salmon farming organizations that gets paid money from the US to destabilize the industry here in BC did some quasi research and found that salmon farms are to blame for everything. Excuse me if I don’t believe a single word of it.
Quoting Nick: “did some quasi research and found that salmon farms are to blame for everything. Excuse me if I don’t believe a single word of it.”
No, it wasn’t ‘quasi.’ It was Scientific. You’re excused.
Public library one what? like anyone reads that. Good thing this won’t see the light of day.