Parks Canada has achieved a significant milestone in the recovery of a threatened fish species in Banff National Park. The westslope cutthroat trout, once on the brink of extinction, is now making a comeback in its historical habitat near Lake Louise, specifically in Hidden Lake.
According to Shelley Humphries, an aquatics specialist with Parks Canada, the westslope cutthroat trout population is now self-sustaining after over ten years of conservation efforts. The successful reintroduction of the species is a result of strategic initiatives, including the removal of brook trout using rotenone, a natural fish poison, in 2018 and 2019. Additionally, the stocking of Hidden Lake with trout eggs for four consecutive years has led to successful spawning and the presence of mature fish in the area.
Humphries emphasized the importance of continued monitoring to ensure the fish’s expansion beyond Hidden Lake into streams and creeks. The ultimate goal is to witness the westslope cutthroat trout thriving in various water bodies within the park, fostering a sustainable and diverse ecosystem.
Historically, the westslope cutthroat trout inhabited a vast region from the northern to the southern ends of Banff National Park. However, the introduction of non-native fish species like brook trout through recreational fishing severely impacted their habitat, reducing their presence to just 10% of their traditional waterways. Parks Canada’s ongoing efforts to restore the westslope cutthroat trout population signify a commitment to rectifying past mistakes and preserving endangered species.
In addition to the restoration of westslope cutthroat trout, Parks Canada is embarking on similar conservation projects for other at-risk species, such as the bull trout. Humphries highlighted the ecological benefits of these initiatives, not only for the targeted fish species but also for supporting the broader biodiversity of the park, including birds of prey and bears.
As Parks Canada continues its conservation efforts, the focus remains on safeguarding endangered species and ensuring their survival against past threats. The dedication to preserving wildlife reflects a commitment to biodiversity conservation and ecosystem protection in Banff National Park.