Parks Canada is celebrating the successful return of a threatened fish species to its native habitat in Banff National Park. Following over ten years of dedicated efforts, the federal agency announced that westslope cutthroat trout are now naturally spawning and repopulating Hidden Lake, near Lake Louise.
Shelley Humphries, an aquatics specialist for Parks Canada’s Lake Louise, Yoho, and Kootenay field unit, expressed excitement over the trout becoming self-sustaining. She mentioned that similar initiatives in the United States have led to successful species recoveries, giving confidence in the project’s outcome.
The restoration work began in 2011 with attempts to eliminate brook trout naturally, which proved unsuccessful. In 2018 and 2019, rotenone, a natural fish poison, was used to remove brook trout. Subsequently, eggs were introduced into Hidden Lake annually from 2021 onwards, resulting in successful spawning and the appearance of fully grown fish this year.
Humphries emphasized the importance of ongoing monitoring, with the goal of observing the trout utilizing streams and creeks beyond Hidden Lake. She mentioned that the trout’s overall population is thriving, and the focus now shifts to encouraging spawning in various stream locations for future sustainability.
Westslope cutthroat trout, once abundant throughout Banff National Park and southern Alberta, faced habitat challenges due to recreational fishing and the introduction of non-native species like brook trout. This led to a significant decline in their population, restricting them to just 10% of their original waterways.
Humphries acknowledged past mistakes but expressed optimism in correcting them, stating that the fish are highly salvageable. Parks Canada continues similar conservation efforts in different locations, including Helen Lake, Cascade Creek, Katherine Lake, and Corral Creek, with plans underway for the preservation of threatened bull trout as well.
The agency aims to not only protect species at risk but also benefit other wildlife, such as birds of prey and bears, by restoring the natural ecosystem. Humphries highlighted Parks Canada’s commitment to safeguarding endangered species, emphasizing the importance of not giving up the fight.
Parks Canada’s efforts to conserve the westslope cutthroat trout species have garnered attention, with additional projects in progress to reintroduce the fish to various mountain lakes in Banff. The agency remains dedicated to preserving biodiversity and restoring the ecological balance in the region.