Since mid-July, Fisheries and Oceans Canada have reported that approximately one million chum salmon have migrated into the Yukon River from the Bering Sea. Despite this surge, experts caution that the rise in numbers does not necessarily indicate a positive trend for the species.
In 2020, a significant decline in chum salmon figures was recorded, prompting concerns among researchers. Sebastian Jones, a wildlife analyst at the Yukon Conservation Society, expressed uncertainty about the sudden increase this year, highlighting the lack of understanding of these ecosystems.
Canadian-origin salmon currently represent around 12% of the returning fish, lower than the usual 20-30% range. While this figure remains below ideal levels, Jones acknowledged that it marks an improvement compared to recent years.
Last year, approximately 25,000 chum salmon entered Canada, with hopes for 100,000 this year. However, Jones emphasized that the desired numbers should range between 150,000 and 250,000 for a healthy population.
Stephanie Peacock, a scientist at the Pacific Salmon Foundation, emphasized the importance of chum salmon as a vital nutrient source in the fall, alongside chinook salmon. Both species have experienced declines over time, with chum salmon showing a more rapid decrease in recent years.
Researchers are investigating the Bering Sea, where the Yukon River meets the ocean, as the starting point for these salmon. Changes in the ecosystem, such as rising water temperatures and increased industrial fishing activities, have raised concerns about their impact on the salmon population.
Although there is cautious optimism about the current numbers, Peacock stressed the need to address the long-term decline and maintain vigilance regarding the status of Yukon chum salmon.