The practice of catch and release is required by law on most Minnesota lakes. That's true on the state's premiere walleye lake, Mille Lacs . Last year, a lot of the walleye released in Lake Mille Lacs died. Biologists at the Minnesota Department of Natural Resources are studying the matter. They're in the final stages of the biggest walleye study ever conducted on Mille Lacs. Among other things, they need to find out just how bad it is to be a fish out of water. Mainstreet Radio's Annie Baxter reports. {