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The Fish Sustainability Index (FSI) uses scientific and local knowledge to assess the health of lake trout in Alberta's boreal forest.
The Fish Sustainability Index (FSI) combines scientific, and local knowledge to assess the health of lake trout in the boreal forest of Alberta.
Stocked lake populations are denoted with a circle. Please note that data reliability is not currently displayed in these figures.
Please note that data reliability is not currently displayed in these figures.
Lake trout FSI spatial layers can be viewed on our interactive web mapping platform.
In summary, lake trout in the boreal forest lakes of Alberta were found to have declined, but recent monitoring and improved regulations appear to be restoring degraded populations. Populations in the remote northeastern Canadian Shield area generally remain healthy.
Historically, lake trout were found in 17 lakes in the boreal forest zone of Alberta, outside of another 25 lakes in the Canadian Shield north of Lake Athabasca. Natural limitations of warm and shallow water likely limited some of these populations to a moderate abundance.
Two of the southern-most lake trout populations have been lost (Lesser Slave and Touchwood lakes), and Cold Lake fish were very nearly lost. None of the boreal forest populations remain at more than moderate abundance. Recent restrictive harvest regulations have begun to restore some of these fisheries, notably Cold Lake and Peerless Lake. The remote fisheries in the Canadian Shield appear to be maintaining moderate to high abundance.
The main threats to sustainability of lake trout in the boreal forest appear to be:
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