Among 28 southern groups of B.C. chinook assessed by the Committee on the Status of Endangered Wildlife in Canada, only two remain “not at risk”. Michael Humling photo

Among 28 southern groups of B.C. chinook assessed by the Committee on the Status of Endangered Wildlife in Canada, only two remain “not at risk”. Michael Humling photo

Scientists worry B.C. hatchery fish threatening endangered wild chinook

Latest assessments identify more southern populations at risk of extinction

More chinook salmon populations have landed on the endangered species list in B.C.

Among 28 southern groups now assessed by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC), only two remain “not at risk.”

“Some of them are not in good shape at all,” said COSEWIC chair John Reynolds.

“It’s risky to predict the future with salmon, because sometimes they surprise us in a good way, but a lot of it will have to do with what people decide they want to do about it. If people want to commit the time and resources, deciding the benefits of recovering these species are greater than the cost, then their future could be different.”

Adding to 2018 assessments on 16 populations, this year COSEWIC focused on 12 southern groups whose numbers are significantly augmented by large-scale hatcheries. Counting only the wild fish, four populations are endangered — the most dire category prior to extinction in the wild— three are threatened, and one is of special concern. As in 2018, just one is not at risk. Three remote populations are data deficient.

With many salmon runs experiencing the lowest returns on record, there has been mounting public pressure for the federal government to step up hatchery production through the Salmonid Enhancement Program.

But conservation groups and scientists are sounding the alarm on the long-term consequences of high-volume hatcheries. Because the genes of fish change rapidly to suit their environment, the biggest concern is fish reared under ideal hatchery conditions will pass on inferior traits. After successive generations, the population could be unfit for the wild.

READ MORE: Thompson, Chilcotin Steelhead Trout in danger of extinction

“If you end up swamping a stream with hatchery genes, I don’t think that is a good recipe for long-term survival of the population, unless you’re prepared to perpetually keep putting out fish from hatcheries. That’s not what DFO’s policy is though. It’s to put wild salmon first,” Reynolds said.

He stressed small community hatcheries have a negligible impact on wild salmon and often benefit smaller depleted runs. The 23 federally-controlled hatcheries of concern release hundreds of millions of juvenile salmon per year.

COSEWIC released its conclusions in November. The detailed findings will not be available until the fall of 2021.

Until then, the actual numbers of wild versus hatchery fish in the latest assessments is unclear, but Reynolds said the competition is “significant — the proportion of hatchery fish can be quite high.”

Importance to fisheries

B.C.’s iconic chinook salmon have high cultural value to First Nations, and are also an economic driver worth hundreds of millions of dollars to both the tourism and commercial fishing industries. The human appetite for chinook is also in competition with more than 100 marine and land animals that favour the food source.

Predation, climate change, salmon farms and over-fishing are often blamed for cumulative impacts on chinook mortality.

The Pacific Salmon Foundation (PSF) is undertaking a comprehensive, first-of-its-kind analysis in B.C. on the impacts of hatcheries, and whether they’re meeting their objectives. PSF Science advisor Brian Riddell emphasized the need for limiting hatchery fish to 30 per cent of a stock, and approaching the unique needs of each wild population individually.

“You can’t have everything at once. You can’t substantially increase the numbers without having an effect on the productivity of the natural stock. But you can have a more balanced approach and gradually restore the population but you have to protect the integrity of the local genetic adaptations.”

READ MORE: Canada can lead the way to save sharks from extinction, says fisheries expert

Both the recreational and commercial fishing sectors are vocal supporters of hatchery production. Sport fishing groups, who say they are unfairly targeted with angling restrictions, are also pushing for the tagging of all hatchery chinook so they can more easily target the fish and potentially enjoy more openings.

Joy Thorkelson, president of the United Fishermen And Allied Workers’ Union agreed, adding all species of hatchery fish are vital to the commercial sector.

“If there wasn’t a hatchery there wouldn’t be any fish,” she said. “As habitat has been destroyed there’s been more populations that are at risk, but they’ve been replaced by hatchery fish so we can continue to catch food. All of the major fisheries depend on hatchery fish to varying degrees.”

Government concerns

B.C.’s new parliamentary secretary for fisheries and oceans, Fin Donnelly, has been given a list of mandates to protect and conserve wild salmon populations, including the order to “support innovation in fish hatcheries”.

Aaron Hill, executive director for the Watershed Watch Salmon Society worries this will translate to a robust hatchery program that caters to the economic needs of fisheries, and not the needs of the wild fish themselves.

In a phone interview, Donnelly shared the concern of hatchery genes being passed to wild populations through federally controlled, large-scale hatcheries, but the strategic use of small hatcheries will remain an important component in provincial efforts to rebuild stocks.

“Community hatcheries and target-based hatcheries—we see it provincially as part of the solution. They play an important role, not just in what they do for salmon rearing, but in education and community engagement.”

The PSF’s scientific review of hatchery impacts will play a critical role in informing the province’s approach, Donnelly added.

The full COSEWIC study will be formally submitted to the environment ministry in the fall of 2021, at which time the Species at Risk Act listing process will begin for the assessed chinook populations.



quinn.bender@blackpress.ca

Chinook salmon protectionFisheries and Oceans Canada

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

Just Posted

Kimberley case counts not at the point for 18 years and older community vaccination, says Interior Health. (File photo)
Many factors considered for smaller community-wide vaccination: Interior Health

East Kootenay resort town’s COVID-19 situation not at the point of community-wide vaccination, say officials

1914
It happened this week in 1914

April 18 - 24: Compiled by Dave Humphrey from the archived newspapers held at the Cranbrook History Centre and Archives

While pharmacies across B.C. are using AstraZeneca for public immunizations for people 40 years of age and older, there is no availability currently in the Kootenays. (AP Photo/Frank Augstein)
No AstraZeneca vaccine availability in Kootenay pharmacies, says Interior Health

Vaccine has been opened up at pharmacies in other areas of the province to people 40 years of age and older

Balsamroot, pictured here, can be found on Sunflower Hill in the Kimberley Nature Park, Eager Hill, Wycliffe Buttes, and many other areas across the Rocky Mountain Trench. (Paul Rodgers file)
Spring’s yearly spectacle of balsamroot

Ever year in May, balsamroot emerges for a brief showy period

Today, on April 22, over 1 billion people will come together – virtually – to mark Earth Day.(Pixabay)
Earth Day 2021: a time to reflect

By Ruth Kamnitzer Today, on April 22, over 1 billion people will… Continue reading

Canadian Prime Minister Justin Trudeau and United States President Joe Biden smile as they say farewell following a virtual joint statement in Ottawa, Tuesday, February 23, 2021. THE CANADIAN PRESS/Adrian Wyld
Trudeau pledges to cut emissions by 40% to 45% by 2030, short of U.S. goal

Trudeau announced target during a virtual climate summit convened by U.S. President Joe Biden

MLA Shirley Bond, right, answers questions during a press conference at Legislature in Victoria, B.C., on February 19, 2019. THE CANADIAN PRESS/Chad Hipolito
Former B.C. gaming minister says she wasn’t told directly about dirty cash flowing to casinos

Shirley Bond said Thursday civil forfeiture, gang violence and gambling addiction were also major concerns in 2011

RCMP Constable Etsell speaks to tourists leaving the area at a police roadblock on Westside Road south of Fintry, B.C., Thursday, July 23, 2009. THE CANADIAN PRESS/ Yvonne Berg
B.C. police say they take ‘exception’ to conducting roadblocks limiting travel

Asking the police to enforce roadblocks exposes officers to further risk and possible COVID-19 infections, says federation president Brian Sauve

As part of the province’s strategy to combat the opioid overdose crisis, take-home naloxone kits have been distributed throughout the province. (Courtesy of Gaëlle Nicolussi)
Vancouver Island could be at its worst point of overdose crises yet: medical health officer

Island Health issued overdose advisories for Victoria, various communities in the last two weeks

BC Hydro released a survey Thursday, April 22. It found that many British Columbians are unintentionally contributing to climate change with their yard maintenance choices. (Pixabay)
Spend a lot of time doing yard work? It might be contributing to climate change

Recent BC Hydro survey finds 60% of homeowners still use gas-powered lawnmowers and yard equipment

Journal de Montreal is seen in Montreal, on Thursday, April 22, 2021. The daily newspaper uses a file picture of Prime Minister Justin Trudeau dressed in traditional Indian clothing during his trip to India to illustrate a story on the Indian variant of the coronavirus. Paul Chiasson/The Canadian Press
Montreal newspaper blasted for front-page photo of Trudeau in India

Trudeau is wearing traditional Indian clothes and holding his hands together in prayer beside a caption that reads, ‘The Indian variant has arrived’

Cannabis bought in British Columbia (Ashley Wadhwani/Black Press Media)
Is it time to start thinking about greener ways to package cannabis?

Packaging suppliers are still figuring eco-friendly and affordable packaging options that fit the mandates of Cannabis Regulations

Join Black Press Media and Do Some Good
Join Black Press Media and Do Some Good

Pay it Forward program supports local businesses in their community giving

Most Read