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Virus discovered in Cultus Lake sport fish
Date:7/19/2012

spawning salmon returning from the North Pacific must be considered at risk of infection."

Earlier this year, SFU honorary degree recipient Alexandra Morton, an independent biologist who collaborates on fish research with Routledge, reported that lab tests had found PRV in Atlantic salmon sold in B.C. supermarkets.

PRV is the second virus commonly associated with salmon farming that scientists say they have found in wild Pacific salmon and trout. Last fall, Routledge and Morton reported positive test results for the infectious salmon anaemia virus (ISAv) in sockeye salmon smolts.

Scientists testifying at the Cohen Commission Inquiry a federally commissioned investigation of the Fraser River's declining sockeye population have brought forth highly contested evidence of ISAv in other wild salmon populations, including Cultus Lake sockeye. The inquiry is scheduled to release its findings this fall.

"We discovered during the Cohen inquiry that pathogens are a major concern for B.C.'s salmon," says Craig Orr, executive director of Watershed Watch and an SFU graduate. "Our findings suggest we need to broaden our thinking and concerns for freshwater fish as well."

"There are many examples of devastating impacts of introduced pathogens in human, mammal and marine populations," adds Routledge.

"When small pox was introduced to North America it decimated the aboriginal population, which had not had any previous opportunity to build up a natural immunity to the disease. The potential for this to happen to B.C.'s highly valued Pacific salmon and trout populations must be taken seriously."


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Contact: Carol Thorbes
cthorbes@sfu.ca
778-782-3035
Simon Fraser University
Source:Eurekalert

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