A DFO biologist at a fish farm in the Okisollo Channel, northeast of Quadra Island, on Oct. 31, 2018. File photo

Dissenter from group of scientific experts calls foul on DFO, says effects of fish farm virus ‘extremely uncertain’

Too much unknown about PRV’s effects on wild stocks, says John Werring

A member of a group of experts looking into the effects of piscine orthoreovirus (PRV) for the federal government is taking issue with claims that the pathogen poses a “minimal risk” to Fraser River sockeye.

On Thursday, Fisheries and Oceans Canada (DFO) said participants in an expert peer-review process – who are providing the federal department with advice on the virus – had “reached a consensus that the risk to Fraser River sockeye salmon due to PRV is minimal.”

But participant John Werring – who is also part of the steering committee for the peer-review process – says that no such consensus exists.

Too much uncertainty remains about PRV, according to Werring, a senior science and policy adviser with the David Suzuki Foundation.

“The uncertainty is extremely high, and there’s no possible way that we can make any conclusion about the impacts of this pathogen on wild salmon in British Columbia,” Werring said in an interview on Friday. “I don’t think there’s a scientist out there that would argue otherwise.”

READ MORE: Virus found among Atlantic salmon ‘poses minimal risk’ to Fraser River sockeye – DFO

Peer review co-chair Gilles Olivier, a former senior official with DFO who is now retired, told reporters on Thursday that a strain of PRV found in B.C. waters is less harmful to Atlantic salmon than one found in Norway, where it originates.

But Werring disputes the claim that PRV isn’t a risk to sockeye.

“They’re uncertain about how long the virus lives, they’re uncertain about how far it spreads, and they’re uncertain about the impact of PRV on other species of salmon,” said Werring, a registered professional biologist with a master’s of science in animal resource ecology.

Claims by DFO about a low risk to sockeye salmon also imply that the virus doesn’t affect wild salmon at all, which isn’t the case, Werring said.

“This is a very narrowly focused, narrowly mandated study,” he added.

Aside from research showing that PRV causes mortality in chinook salmon, he said that unpublished evidence viewed by the peer-review group also points to risks for wild coho and chum salmon.

READ MORE: Alexandra Morton, ‘Namgis First Nation win Federal Court ruling

The peer-review study was restricted to PRV that spreads from fish farms in the Discovery Islands.

“Moving north through the Discovery Islands into the Johnstone Strait and the Queen Charlotte Strait, they’re exposed to 20, 30 other fish farms,” he said. “And that’s not taken into consideration.”

He noted that an email sent out on Wednesday night by Jay Parsons, director of DFO’s Aquaculture, Biotechnology and Aquatic Animal Health Sciences Branch, asked peer-review participants to stick to “agreed-on summary bullets” if approached by the media.

“These summary bullets were not shared with participants prior to the decision to release them, so they were not ‘agreed-on,’” said Werring in an email to the Mirror.

“Had we had the opportunity to review them in advance, it may very well be that we (participants) would have asked for amendments on the overall message. But we were not given that opportunity.”

DFO hasn’t completely ignored uncertainties about PRV science.

A statement from DFO on Thursday acknowledged “there are still some knowledge gaps in our understanding of this virus” and peer-review co-chair Craig Stephen said during the teleconference that a high degree of uncertainty remains about PRV.

READ MORE: Cermaq says experimental ‘closed-containment’ fish farm coming to Canadian waters

The mixed messages from the peer-review group come on the heels of a major legal decision on PRV and the salmon farming industry.

On Monday, the Federal Court of Canada overturned a policy allowing young salmon to be transferred into ocean-based fish farms without first being screened for the virus. This followed lawsuits by ‘Namgis First Nation and by biologist Alexandra Morton, an outspoken critic of open-net fish farms.

Justice Cecily Strickland found that DFO’s threshold for acceptable harm to wild salmon was too high and that its policy didn’t comply with the precautionary principle. The court also found that DFO breached its duty to consult ‘Namgis First Nation about PRV. Strickland gave the federal government four months to review the policy.

DFO declined to comment about its plans during Thursday’s conference call.


@davidgordonkoch
david.koch@campbellrivermirror.com

Like us on Facebook and follow us on Twitter

A previous version of this article quoted John Werring as saying “there’s no possible way that we can make any conclusion about the impacts of this pathogen on wild salmon in British Columbia…. I don’t think there’s a scientist out there that would argue otherwise, except for DFO.” The words “except for DFO” have been removed because they didn’t capture Werring’s intent.

Just Posted

Charstate Community Garden almost ready for seeds

Still room on the sign-up list to get a plot at Campbell River’s newest community garden

‘Two Campbell Rivers’: new report sheds light on history of drug use in a boom-and-bust city

Wave of overdose deaths prompted study into the local drivers of substance use

VIDEO: Driver in bizarre hit-and-run at car dealership in Campbell River turns herself in

Police believe alcohol was a factor in incident causing estimated $15,000 in damages

BC Transit adds hospital bus stop, responding to public feedback

About 1,600 signed petition for bus stop to be added to Campbell River route

VIDEO: B.C.’s waving granny gets incredible send-off from school kids

Tinney Davidson has been waving at students on their way to school for over 11 years, but is moving in a month

Oak Bay Sgt. struggles through emotional testimony in double murder trial

Andrew Berry is charged with second-degree murder in deaths of daughters Chloe (6) and Aubrey (4)

New immigrants healthier than Canadian-born population

In 2016, 7.5 million immigrants were accounted for in Canada

One million recyclable bottles ‘lost’ daily in B.C., foundation says

387 million beverage containers didn’t make it back into the province’s regulated deposit refund system in 2017

Struggling B.C. adoption agency elects new board that intends to keep it open

The previous board announced that Choices would close May 31

Island-born Snowbirds pilot enjoying homecoming in skies over Comox

Logan Reid once stood clinging onto the fence outside the Comox Air… Continue reading

Attack on student in Courtenay ‘way more than bullying’, says mom

A Comox Valley mother said “it was way more than bullying” at… Continue reading

Vancouver man, 19, charged in human trafficking case involving teen girl

The 16-year-old girl was reported missing and later discovered in Vancouver

Most Read