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COSEWIC Assessment and Update Status Report on the Aurora Trout in Canada

Limiting Factors

The two native lakes are still threatened by acidification. The main source of acid is atmospheric deposition of pollutants, but historically deposited sulphur may also be stored in adjacent wetlands and could contribute to reacidification following drought years (Schindler 1998). The use of groundwater springs for spawning and thermal refugia also leave Aurora Trout vulnerable to land use practices (eg. logging) and climatic changes that affect the quantity and quality of groundwater seepage. In addition, Brook Trout are vulnerable to competition from other species such as yellow perch (Fraser 1978) which can be introduced from fishermen's bait buckets. Fortunately, angling is prohibited in the lakes with reproducing populations and there is a ban on use of live baitfish in all other lakes with Aurora Trout. Despite this illegal harvesting occurred during the 1990’s on Southeast Campcot Lake and Northeast Campcot Lake.