Scientists: Warming weather threatens walleye:

Scientists say that within a few decades some Minnesota lakes probably will be too warm for walleye to thrive. And even northern Minnesota lakes might get too warm in summer to hold key walleye food such as cisco.

Walleye are the backbone of the resort, fishing and bait industry and represent a century of family fishing traditions.

"We,re going to have fewer lakes with walleyes in them, and fewer walleyes in other lakes," said Don Pereira, fisheries research and policy manager for the Minnesota Department of Natural Resources.