The debate over farmed salmon is now decades old, but wrapped up in the relationship between salmon farms and our marine eco-system are millions of consumers who just want to be able to enjoy that incredibly nutritious and succulent salmon meat with a clear conscience. As a sustainable seafood advisory organization, we are consistently fielding questions about farmed salmon. The majority of these questions mimic the rhetoric that is seen in the media regarding three main topics: mercury content, fish feed and sea lice. While there are many wonderful articles that address these first two issues, including our own assessment of fish feed and the conversation ratio, it is the study of the relationship between sea lice, salmon farms and wild salmon that has motivated this post.
On June 17th, Terence Corcoran of the Canadian Newspaper The Financial Post wrote an interesting article examining the science behind the assertion that salmon farms are killing wild salmon. Read the article below and be sure to leave a comment:
There’s a national science battle underway over salmon. It is a battle over the fate of one part of the salmon industry, salmon farms, and the work of activists who claim to have scientific evidence that fish farms are killing wild salmon and are a threat to the very existence of wild salmon, ocean fisheries and ecosystems.
The science conflict, steeped in politics and green activism, has been raging for the better part of a decade. It has many facets, but it reached a climax of sorts in December, 2007, when researchers at the Centre for Mathematical Biology (CMB) at the University of Alberta published a paper that claimed sea lice from fish farms in British Columbia were contaminating wild pink salmon. In a sensational press release at the time, the University of Alberta’s public relations crew declared the coming collapse of wild salmon: “Fish Farms Drive Wild Salmon Populations Toward Extinction.” The release claimed the study — headed by fisheries ecologist Martin Krkosek and including eco-activist Alexandra Morton — proved that pink salmon populations have been rapidly declining for four years.
“The scientists expect a 99% collapse in another four years or two salmon generations, if the infestations continue.”


















