Zach Feiner
Fisheries biologist based in Madison, Wisconsin, who researches lake ice timing and its effects on fish populations such as walleye and advises on local fisheries management.
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Mar 2, 2026 • 13min
Spring ice is thawing earlier in lakes. What does that mean for life below the surface?
Zach Feiner, a fisheries biologist in Madison who studies lake ice timing and fish, walks the ice and explains big shifts beneath the surface. He talks about wildly variable spring thaws, how mismatched algae-to-fish timing threatens walleye, and signs of warm-water species moving in. The conversation covers on-ice research methods and tough choices for managing changing fisheries.
