Parasite Threatens Trout and Salmon in Canadian National Parks

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Parks Canada officials are monitoring lakes and rivers in Kootenay and Yoho national parks for a parasite that could decimate young trout and salmon populations. The first suspected case of whirling disease in British Columbia was found in September, prompting the closure of affected waterways. Additional suspected cases have since been discovered. The disease poses no risk to humans but can be deadly for fish, causing spinal deformities and erratic swimming. Parks Canada has closed all waterbodies in the parks until March next year to protect at-risk species and preserve the ecosystem.

VANCOUVER — Parks Canada officials said they're closely watching lakes and rivers in Kootenay and Yoho national parks for a parasite that could "decimate" as much as 90 per cent of young trout and salmon.

Francois Masse, Parks Canada’s field unit superintendent for Lake Louise, Yoho and Kootenay national parks, said they later found “additional suspected cases” of the disease in the Kicking Horse River, Wapta Lake, Finn Creek, and Monarch Creek. Whirling disease doesn't pose a risk to humans, but can be deadly for trout, salmon and whitefish, causing spinal deformities and making fish swim in erratic circles.

 

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