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 sa国际传媒渘ot at risk.sa国际传媒�
sa国际传媒淪ome of them are not in good shape at all,sa国际传媒� said COSEWIC chair John Reynolds.
sa国际传媒淚tsa国际传媒檚 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.sa国际传媒�
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 sa国际传媒� the most dire category prior to extinction in the wildsa国际传媒� 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.
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sa国际传媒淚f you end up swamping a stream with hatchery genes, I donsa国际传媒檛 think that is a good recipe for long-term survival of the population, unless yousa国际传媒檙e prepared to perpetually keep putting out fish from hatcheries. Thatsa国际传媒檚 not what DFOsa国际传媒檚 policy is though. Itsa国际传媒檚 to put wild salmon first,sa国际传媒� 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 sa国际传媒渟ignificant sa国际传媒� the proportion of hatchery fish can be quite high.sa国际传媒�
Importance to fisheries
B.C.sa国际传媒檚 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 theysa国际传媒檙e 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.
sa国际传媒淵ou cansa国际传媒檛 have everything at once. You cansa国际传媒檛 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.sa国际传媒�
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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 Workerssa国际传媒� Union agreed, adding all species of hatchery fish are vital to the commercial sector.
sa国际传媒淚f there wasnsa国际传媒檛 a hatchery there wouldnsa国际传媒檛 be any fish,sa国际传媒� she said. sa国际传媒淎s habitat has been destroyed theresa国际传媒檚 been more populations that are at risk, but theysa国际传媒檝e been replaced by hatchery fish so we can continue to catch food. All of the major fisheries depend on hatchery fish to varying degrees.sa国际传媒�
Government concerns
B.C.sa国际传媒檚 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 sa国际传媒渟upport innovation in fish hatcheriessa国际传媒�.
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.
sa国际传媒淐ommunity hatcheries and target-based hatcheriessa国际传媒攚e 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.sa国际传媒�
The PSFsa国际传媒檚 scientific review of hatchery impacts will play a critical role in informing the provincesa国际传媒檚 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.
