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Lake-Wide Sustainability of Lake Trout Stocks in Lake Superior
A meta-population model will be developed to evaluate lake-wide sustainability of recently restored lake trout stocks across Lake Superior, building on a stochastic, age-structured population model that was developed under a previous Sea Grant-funded project. The hypothesis is that long-term sustainability of individual stocks within Lake Superior is enhanced by the presence of other stocks in the lake through immigration. Movement among stocks and effects of environmental factors will be modeled. The model will mimic combinations of recreational and commercial fishery harvest by simulating probability distributions for key population parameters, such as population abundance and recruitment. Research will be coordinated through the Lake Superior Technical Committee representing all state, federal, and tribal agencies with jurisdiction on Lake Superior. Fishery managers on Lake Superior will be given a tool for estimating short-term harvest quotas and for simulating long-term effects of management strategies.
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