- Pink salmon populations known to be experiencing sea lice infestations were depressed and declining whereas the other populations remained productive.
- If sea lice infestations continue, affected pink salmon populations will collapse by 99 percent in a further two salmon generations (four years).
- The sea lice typically killed over 80 percent of the fish in each salmon run. 3
To isolate sea lice from other factors affecting pink salmon populations, the researchers used data from the Canadaâ€™s Department of Fisheries and Oceans that enumerate adult salmon returning to BC rivers each year since 1970. The data allowed researchers to compare populations of pink salmon exposed and unexposed to salmon farms.
In a press release, KrkoÅ¡ek and his co-authors calculated that sea lice have killed more than 80 percent of the annual pink salmon (Onchorhynchus gorbuscha) returns to British Columbiaâ€™s Broughton Archipelago. 4
The authorsâ€™ results indicate wild salmon populations are endangered and suggest that large-scale aquaculture should be carefully considered for its effect on wild species.
The Broughton Archipelago has an â€œ80-kilometer gauntlet of fish farmsâ€ that juvenile salmon must negotiate on the way to the open ocean. Study co-author Alexandra Morton, director of the Salmon Coast Field Station, located in the Broughton said, â€œSalmon farming breaks a natural law. In the natural system, the youngest salmon are not exposed to sea lice because the adult salmon that carry the parasite are offshore. But fish farms cause a deadly collision between the vulnerable young salmon and sea lice. They are not equipped to survive this, and they donâ€™t.â€
The cause, according to KrkoÅ¡ek is simple: â€œIn the Broughton there are just too many farmed fish in the water. If there were only one salmon farm this problem probably wouldnâ€™t exist.â€
What to do? Mark Lewis, a mathematical ecologist at the University of Alberta, identified two possible solutions: closed containment and moving farms away from rivers.
Daniel Pauly, Director of the University of British Columbiaâ€™s Fisheries Centre, put it in perspective: â€œIf industry says itâ€™s too expensive to move the fish farms or contain them, they are actually saying the natural system must continue to pay the price. They are, as economists would say, externalizing the costs of fish farming on the wild salmon and the public.â€
The BC Liberal [sic] Party has been supporting an increase in the number of salmon farm operations. 5 The salmon farming industry has reaped a whirlwind of criticism. Corporate salmon farming in BC is Norwegian dominated, and a section of the Norwegian media jumped to a nationalistic defense of the Norwegian concerns.
Overall, the Norwegian media reaction was mixed. Norwayâ€™s largest media house, NRK, headlined with â€œNorwegian company wipes out wild salmon.â€6 Industry media portrayed the matter differently. NÃ¦ringslivsavisen ran: â€œAttack on Norwegian salmon giants.â€ 7 Dagens NÃ¦ringslivâ€™s headline was: â€œFrontal attack against Norwegian salmon giants.â€ 8 They attacked the prestigious Science journal and denounced the scientists as â€œactivists.â€ Morton was labeled an â€œenvironmentalist,â€ as was KrkoÅ¡ek. One wonders about what is so objectionable about being an â€œenvironmentalist.â€ Nonetheless, one would hardly hurl the â€œenvironmentalistâ€ label at the corporatists.
Marine Harvest Canada CEO Vincent Erenst complained the Science article authors are not â€œindependent researchers.â€ 9 Erenst charged that the scientists are engaged in â€œagenda research,â€ which is â€œnot research.â€ He further asserted, â€œThese researchers have made up their minds they would arrive at a predetermined result, then have ruled out everything that conflicts with their hypothesis.â€ Nowhere in the interview is evidence provided to back up his allegations.
Ian Roberts, Marine Harvest Canadaâ€™s communications director, chimed in, â€œI believe people are starting to get a little weary of this type of Doomsday prophecy.â€9 These are sly digs bordering on ad hominem that do not address the scientistsâ€™ research results and conclusions.
The Pacific Salmon Forum responded, â€œThe extent of the impact of salmon farming on wild salmon is still not fully understood, nor is there a consensus of scientists on the best ways to minimize that impact.â€
Mary Ellen Walling, executive director of the British Columbia Salmon Farmers Association (BCSFA) stated that KrkoÅ¡ek and Morton are â€œwell known for their hard line views about salmon farming.â€ 10 One wonders if this is similar to the hard-line rejection of environmental concerns by the salmon-farming industry lobby.
The BCSFA once claimed it would â€œlike to work in partnership to ensure wild salmon are protected.â€11
KrkoÅ¡ek criticizes the salmon farming industry for lacking the competence to realize the problem. â€œWe have tried to co-operate for years, but it has been difficult. The salmon farming industry does not want to talk with environmentalists at all, and they are skeptical of the science around this,â€ he said.12
Nevertheless, when criticisms were directed to the study, Krkosek compellingly refuted the criticisms.13
Given what is at stake, Morton called for public input: â€œWild salmon are enormously important to the ecosystem, economies, and culture. Now it is clear they are disappearing in place of an industry. People need to know this and make a decision what they want: industry-produced salmon or wild salmon.â€
- Alexandra Morton, â€œDying of Salmon Farmingâ€ in Stephen Hume, Alexandra Morton, Betty C. Keller, Rosella M. Leslie, Otto Langer, and Don Staniford, A Stain Upon the Sea: West Coast Salmon Farming (Harbour Publishing, 2004), 199-237. See review. #
- Martin KrkoÅ¡ek, Jennifer S. Ford, Alexandra Morton, Subhash Lele, Ransom A. Myers, Mark A. Lewis, â€œDeclining Wild Salmon Populations in Relation to Parasites from Farm Salmon,â€ Science, 14 December 2007: Vol. 318. no. 5857, pp. 1772 â€“ 1775. For a summary of the Science paper, see Martin KrkoÅ¡ek, Jennifer S. Ford, Alexandra Morton, Subhash Lele, Ransom A. Myers, Mark A. Lewis â€œAquaculture Impacts on Wild Salmon,â€ Lensfest Ocean Program Research Series, December 2007. #
- Martin KrkoÅ¡ek, Jennifer S. Ford, Alexandra Morton, Subhash Lele, Ransom A. Myers, Mark A. Lewis â€œAquaculture Impacts on Wild Salmon,â€ Lensfest Ocean Program Research Series, December 2007. #
- Press release, â€œFish Farms Drive Wild Salmon Populations Toward Extinction: Experts raise serious concerns about the expansion of industrial fish farming,â€ University of Alberta Compass, 13 December 2007. #
- Joel Connelly, â€œIn The Northwest: Opponents are raising a stink over B.C. fish farms,â€ Seattle Post-Intelligencer, 21 February 2003. #
- Eva Aalberg Undheim, â€œNorske selskap utryddar villaks,â€ nrk nyheter, 14 December 2007. #
- â€œAngriper norske laksegiganter: Anklages for Ã¥ utrydde villaksen i Canada,â€ NA24.no, 14 December 2007. #
- BjÃ¸rn Erik Dahl and Agnar Berg, â€œFrontalangrep
mot norske laksegiganter,â€ DN.no, 14 December 2007.
From an industry that hires disinformation specialists, the industry offensive was predictable.
Kim Petersen, â€œFarmageddon and the Spin-doctors,â€ Dissident Voice, 29 March 2003. For a recap of industry complaints, see Kim Petersen, â€œEating Profit: Frustrations of the Salmon-Farming Industry,â€ Dissident Voice, 21 April 2005. #
- BjÃ¸rn Erik Dahl and Agnar Berg, â€œMarine Harvest Canada boss attacks Science article writers,â€ Intrafish, 18 December 2007. # # #
- Tom Barrett, â€œFish Farm Documents Show Politics Trump Science, Say Critics,â€ The Tyee, 12 May 2005. #
- Mary Ellen Walling, â€œWild versus farmed Salmon: Emotion Versus Facts,â€ British Columbia Salmon Farmers Association, 15 April 2004. NB, the link no longer appears to carry the entirety of the article. #
- Translated from Eva Aalberg Undheim, â€œNorske selskap utryddar villaks,â€ nrk nyheter, 14 December 2007. â€œVi har forsÃ¸kt Ã¥ fÃ¥ til eit samarbeid i Ã¥revis, men det har vore vanskeleg. OppdrettsnÃ¦ringa vil ikkje snakke med miljÃ¸vernarar i det heile teke, og dei er skeptiske til vitskapen kring dette, seier han.â€ #
- Martin Krkosek, â€œPublic Critiques and Responses.â€ #