Whirling Disease Update (September 14) – On September 12, the Canadian Food Inspection Agency confirmed the presence of whirling disease in the Bow River, downstream from the mouth of the Cascade River in Banff National Park. Alberta Environment and Parks issued this announcement.
Whirling Disease –The recent discovery of Whirling Disease at Johnson Lake in Banff National Park is both a significant and concerning event. This is the first occurrence of whirling disease in Canada. While not harmful to humans, Whirling Disease is an infectious disease affecting trout and salmon. Younger stages of fish are especially vulnerable. It has been reported that whirling disease can result in the death of up to 90% of infected fry and fingerlings.
The parasite that causes Whirling Disease is spread through contact between fish and a freshwater worm. It can be spread my moving infected fish, infected works, or contaminated equipment and water. Therefore, please remember to clean, drain, and dry all aquatic gear and equipment prior to leaving a water body.
Upon learning of the recent outbreak Trout Unlimited Canada was contacted by local media outlets. Our coments were briefly mentioned recently through Global Calgary.
Aquatic Invasive Species (AIS) pose a serious threat to Alberta’s aquatic ecosystems and the recreational and economic benefits that they support. Trout Unlimited Canada was involved in a multi-stakeholder team led by the Alberta Water Council which just released a report with recommendations on how the Province can better deal with AIS. Although Whirling Disease was not directly addressed in the report, many of the recommendations are relevant.
Answers to FAQs regarding Whirling Disease are also available from Alberta Environment and Parks.
Although the issue is being addressed and managed by provincial government agencies TUC will also work with our federal and provincial partners on the Whirling Disease issue.
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