Pacific Salmon Foundation researcher dissects tissue samples from overwintering Chinook to detect for the presence of infectious agents in Quatsino Sound, B.C., March 2019. (Photo by Amy Romer)

New viruses discovered in endangered wild Pacific salmon populations in B.C.

Study looked at 6,000 salmon along the B.C.’s coastline, including in the wild and in fish farms

A series of new fish-infecting viruses have been discovered in endangered Chinook and Sockeye salmon populations.

Among three new viruses discovered is a virus that has never been known to infect fish before, according to a news release from UBC researchers released on Wednesday.

While the impact of the viruses on salmon health isn’t yet known, all three are related to viruses that cause serious disease in other species, the study suggests.

Researchers from UBC’s earth, ocean and atmospheric sciences department, along with Fisheries and Oceans Canada scientists, used DNA sequencing to screen for viruses within more than 6,000 salmon from along the B.C. coast, including wild, hatchery and aquaculture fish.

UBC and Fisheries and Oceans Canada researchers used DNA sequencing followed by tests specific to each virus to screen more than 6,000 salmon from along the B.C. coast, including wild, hatchery and aquaculture fish.

READ MORE: DFO to test for harmful virus at B.C. fish farms

UBC’s department of earth, ocean and atmospheric sciences researcher Gideon Mordecai says he was surprised by this latest discovery, which was published this week in the research journal eLife.

“We were surprised to find viruses which had never before been shown to infect fish,” said Mordecai.

“Although there’s no risk to humans, one of the viruses is evolutionary related to to respiratory coronaviruses, and is localized to the gills. That suggests it has a similar infection strategy to its distant relatives that infect mammals.”

One new virus was detected in 15 per cent of all hatchery Chinook tested, which is more commonly found in hatchery salmon.

Another new virus was detected in 20 per cent of Chinook fish found in B.C. fish farms, but was only found in adult or sub-adult salmon. Usually, these viruses are more likely found in cultured fish than in the wild.

The research findings come as the population of Chinook and sockeye salmon continue to decline – a trend scientists have been documenting for 30 years.

While much of the focus has been on the impact of piscine orthoreovirus, the new findings highlight how little is known about other viruses endemic to salmon populations.

UBC virologist Curtis Suttle said the findings emphasize the potential role that viral disease can play in wild fish stocks.

“It’s essential that we determine whether these viruses are important factors in the decline of Chinook and sockeye salmon stocks,” Suttle said.

“The research highlights the need for robust surveillance to improve our understanding of how viruses might impact the health of wild Pacific salmon populations.”

Like us on Facebook and follow us on Twitter.

Just Posted

Colwood taking steps to improve intersection safety after two motor vehicle incidents in one week

Pedestrian and cyclist struck in two separate incidents at Sooke and Metchosin Roads

PHOTOS: The King of Rock and Roll runs the 25th Annual King and Queen of the Hill Race

Lambrick Park Secondary students, staff, alumni take on Mount Douglas

Free bike exchange program available to Greater Victoria kids

The Re-Buy-Cycle Shop in Langford offers free bikes for young learners

Esquimalt café cooks up connections for all abilities

A Kinder Cup focuses on positivity, inclusivity and connection

Central Saanich sparks up new opening burning bylaw

New bylaw offers ‘balanced approach’ between status quo and tougher provincial regulations

Handgun crackdown, health spending and transit plans latest campaign promises

Friday was the end of a busy week on the campaign trail

Air Canada forced girl, 12, to remove hijab: civil rights group

The San Francisco Bay Area office of the Council on American-Islamic Relations calling for change

Man from Winnipeg who was hiking alone found dead in Banff National Park

RCMP say the man was hiking alone on Mount Temple Thursday

One-in-five British Columbians think they’ll win big while gambling: study

Roughly 58 per cent of British Columbians bought at least one lottery ticket in past year

Resident finds loaded shotgun inside a duffle bag in Kelowna alleyway

RCMP seized a loaded 12-gauge shotgun, ammunition, clothing and other items

Graffiti, calls and Snapchat: RCMP probe string of threats targeting Kamloops schools

There have been nine different threats made to four different schools in the city

B.C. truck drivers to face higher fines for not using winter tire chains

As of Oct. 1, not using chains on the highway when required could net you a $598 ticket

Singh campaigns in Toronto, May in Winnipeg, as Liberal and Tory leaders pause

All parties expected to be back on the campaign trail Sunday

Possible Canadian cases of vaping illnesses being investigated: health officer

‘I think that will be really important to address the overall trend of youth vaping’

Most Read