香蕉视频直播淟ooking at this year's salmon return, relative to the last 15 years香蕉视频直播� I would call this year certainly average to above average,香蕉视频直播� said Greg Taylor, senior fisheries advisor to Watershed Watch Salmon Society.
As some B.C. salmon hatcheries are experiencing their , experts across the province are welcoming the refreshing news.
香蕉视频直播淲e've seen good returns across species and populations,香蕉视频直播� said Taylor. 香蕉视频直播淥n the east coast of Vancouver Island, in most cases, we香蕉视频直播檙e seeing excellent chum returns and very good coho returns,香蕉视频直播� said Taylor. 香蕉视频直播淥n the west coast, we saw excellent sockeye returns.香蕉视频直播�
Another promising sign, noted Taylor, is the reappearance of steelhead, a member of the salmonid family, previously thought to be on the brink of collapse in numerous watersheds.
Peter McCully, a biologist and longtime volunteer with the Goldstream Hatchery in Greater Victoria shared his enthusiasm as this year香蕉视频直播檚 numbers are above all prior expectations.
香蕉视频直播淚n the last few years, [chum salmon] have been suffering from changing ocean conditions so we were sort of apprehensive about how the run would look this year,香蕉视频直播� he said. 香蕉视频直播淏ut as it turns out the return has exceeded DFO香蕉视频直播檚 target.香蕉视频直播�
Originally hoping to reach the threshold of 15,000 chum, McCully reported that upwards of 20,000 returned to the river this year. Additionally, the hatchery harvested up to 1,800 coho, which McCully labelled as a 香蕉视频直播渞eally significant香蕉视频直播� number.
香蕉视频直播淭his is one of the best returns that there's been for the last 20 years I would suggest,香蕉视频直播� he said. 香蕉视频直播淭hey香蕉视频直播檙e by no means record returns, but they're better than what we had anticipated.香蕉视频直播�
When asked about the reasons behind this year's spawning numbers across the province, experts remain puzzled by the increase.
香蕉视频直播淲e still don't quite understand what the changes are, but the [conditions are] very good and very suited for salmon,香蕉视频直播� said Taylor. 香蕉视频直播淲e're seeing some real changes in the Salish Sea where large numbers of chinooks香蕉视频直播� and cohos are migrating through at very high numbers.香蕉视频直播�
At this time, without the perspective of history, McCully and Taylor noted that any conclusions are purely speculative.
香蕉视频直播淲ith salmon, no one has the defining answer,香蕉视频直播� said Taylor. 香蕉视频直播淏ased on my observations香蕉视频直播� we saw good returns coastwide. We've also seen a change in the northeast Pacific where香蕉视频直播� the temperatures in the waters have become more beneficial to our salmon.香蕉视频直播�
Potential theories range widely, including a recent switch in climate, , which both have global impacts on weather and the ecosystems of the Pacific Northwest.
Unlike El Nino events, which bring warmer waters, unfavourable to salmonids, La Nina climate patterns bring cooler, nutrient-rich waters to the West Coast, from which salmon species benefit.
Another theory that may have benefited B.C.香蕉视频直播檚 salmon involves a recent decline in pink salmon populations from Alaskan hatcheries and chum populations from Japanese hatcheries in the Pacific this year, explained Taylor.
香蕉视频直播淪cientists have shown how there is a relationship between the hatchery abundance 香蕉视频直播� how much fish we put into the ocean 香蕉视频直播� and how that impacts B.C. salmon runs,香蕉视频直播� he said. 香蕉视频直播淸If you] put out billions of salmon from hatcheries they just out-compete wild salmon stocks.香蕉视频直播�
香蕉视频直播淭his year, for whatever reason, they weren't there and I think our fish saw the benefit of the relative absence of hatchery fish.香蕉视频直播�
As Taylor reiterated, the exact justification behind this year香蕉视频直播檚 numbers remains unclear, as what happens in the ocean is still unknown.
香蕉视频直播淚t could have been just the cooler temperatures in the Bering Sea, or it could have been [less] predators. We just don't understand,香蕉视频直播� said Taylor. 香蕉视频直播淚n the fisheries, we call the Pacific Ocean the 香蕉视频直播榖lack box香蕉视频直播� because we don't have a good idea of what happens out there.香蕉视频直播�
Enthusiasm on hold
Although what happens out at sea remains a mystery, Taylor stressed that some of the greatest threats to salmon are man-made.
香蕉视频直播淲e're seeing good returns, but what we saw this summer was climate change in action,香蕉视频直播� said Taylor. 香蕉视频直播淚f I compared it to when I began my career, I would classify them as poor and if I was to them to pre-contact, they're abysmal.
Concerned about , which dried up numerous vital streams across the province, experts feared for this year香蕉视频直播檚 spawning season. Fortunately, fall rains arrived on time, and rivers across B.C. swelled just in time for the salmon香蕉视频直播檚 final journey.
If B.C. experiences similar droughts this summer, it could be 香蕉视频直播渇atal香蕉视频直播� for coho, chinook, and sockeye, which reside in lakes and rivers for up to a year after hatching before migrating to the ocean, explained Taylor.
香蕉视频直播淭he marine environment's been terrific for salmon, but hopefully, they get a decent summer next year and the progeny do well next year,香蕉视频直播� said Taylor. 香蕉视频直播淏ut if we have another drought next year, a lot of the benefits will be decimated.香蕉视频直播�
Drying streams can be deadly for juvenile salmon, exposing them to high temperatures, lack of water, and predators.
Other man-made threats, like logging, mining, extensive urban development and other human activities near spawning streams can have deleterious impacts on fish populations, added Taylor.
Even once out at sea, these silvery fish are not entirely out of harm's way. Noting that salmon are among the few species on Earth reliant on both freshwater and ocean environments, this makes them particularly susceptible to the impacts of climate change.
Events like an upcoming El Nino pattern or large marine heatwaves, such as 香蕉视频直播淭he Blob香蕉视频直播� in the Pacific Northwest from 2013 to 2016, which raised ocean temperatures by up to 3.9 C in some areas, all pose a serious risk to both current and future salmon populations.
Though the impact of climate change on salmon is unclear, said Taylor, any blow dealt to this keystone species could have devastating ripple effects on the West Coast food chain, affecting resident killer whales, bears, eagles, wolves, and more.
Hopeful signs
Despite painting a grim picture of B.C. salmon's potential future, Taylor remains optimistic. After being in fisheries since the '80s, and witnessing firsthand the impact of climate change on the marine environment, the fisheries expert argues that it香蕉视频直播檚 not too late to reverse some ongoing worrying trends.
Although limiting carbon emissions is the best way to mitigate global warming, Taylor said that smaller efforts, such as adapting and restoring local streams to make them more salmon-friendly, would also be of great help. Additionally, rethinking urban expansion and its impact on local streams and salmon populations could also be beneficial, he noted
Before his conservation work, Taylor led a First Nations' gillnet fleet for years and has seen how reconciliation efforts have reshaped the province香蕉视频直播檚 fisheries over time. As DFO hands more responsibility for salmon management to First Nations, Taylor believes this partnership could be key to safeguarding the salmon's future.
香蕉视频直播淔irst Nations are stepping up and they bring a different ethic to it,香蕉视频直播� he said. 香蕉视频直播淚t's a marriage between good science, good management, and a different belief system when it comes to [salmon] management. That's what gives me more hope in the future.香蕉视频直播�
