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.

Get local stories you won't find anywhere else right to your inbox.
Sign up here

Just Posted

UPDATE: Stolen utility vehicle returned to Ladysmith Motorsports

The 2020 Maverick Trail side by side was found abandoned on Spruston Road in Cassidy

Baby Bear statue returned to be reunited with Mama and Papa

Culprit left it near the Henry Road roundabout in Chemainus with a note attached

Filming for Resident Alien begins in Ladysmith

Aliens and excitement take over the streets of Ladysmith during new TV series

Nearly 20 individuals accessed LRCA’s cold weather shelter during 2020 snowstorm

Most individuals accessed the shelter for food, showers, laundry, and to warm up

Baby bear carving stolen from his family in Chemainus

Thief repeatedly kicked it and dislodged it from cement and rebar

VIDEO: Feds look to help 126 Canadians quarantined in China for coronavirus

China has confirmed more than 4,500 cases of the new virus, with more than 100 deaths

Off-duty Nanaimo Mountie takes down would-be ice cream thief

Suspect attempted to steal Dilly Bars from Dairy Queen location on Sunday

Sap thief taps Saanich park maple trees, faces hefty fine

One tree found with four taps in Mount Doug Park

Nanaimo man hit with pole in dispute over off-leash dog

RCMP say no charges recommended at this time

Was there a tornado on Vancouver Island Monday?

Suspected phone app glitch gives eerie warning

Work has started on Malahat Skywalk, expected completion in 2021

$15-million project expected to open in spring, 2021

B.C. reports first coronavirus in Vancouver region

First patient visited Wuhan, China, reported symptoms

Uber threatens legal action to ‘defend its right’ to operate in Surrey

‘I have no concerns,’ Mayor Doug McCallum replies

Victoria resident says WestJet employee uttered racist comment, refused to let her on plane

Customer claims she was told ‘You guys can’t handle your alcohol’ by WestJet employee

Most Read