| Warmer springs, variable ice-out dates are hurting walleye spawning | |
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Credit: Wisconsin DNR |
Walleyes, the favorite game species in many Midwest lakes and Minnesota’s official state fish, are struggling to spawn successfully due to warming springs and highly variable ice-out dates, creating more bust years and fewer boom years for many walleye populations. |
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That was the finding of a University of Wisconsin study published this week in the journal Limnology and Oceanography Letters.
The problem stems from walleye being creatures of habits that developed over millennia and which can’t keep up with changing climatic conditions, especially increasingly earlier and variable ice-out dates. |
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