Perhaps more than any other fish, northern Wisconsin identifies with the walleye. But walleye populations in many local lakes have been struggling. Some are even at risk of disappearing completely, as the populations are no longer naturally reproducing. Fisheries biologists have had to get creative to try to address the problem, and they’re doing it in different ways in different parts of the Northwoods. The Minocqua chain is a prime example. “The walleye population in the entire chain was very,