In-Fisherman, surprisingly, talks about this quite a bit. The general consensus is that the walleye range is going to be pushed quite a bit further north over the next couple decades.
The big plus side, if there is one, is that the smallmouth fishing on those waters will improve considerably as they become the dominant predator.
We see it here in central MN too, we have a lot of lakes with the Tulibee die offs each summer as the water gets to warm.
Glad I'm not a lake trout.
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