Red Lake Nation News - Babaamaajimowinan (Telling of news in different places)

Invasive species slow walleye growth, study says, meaning fewer survive winters


January 29, 2020

Photo courtesy of Jeff Gunderson Spiny water fleas in a walleye lake cause young fish to grow slower, a recent study indicates.

Young walleye growth rates decline by 12 to 14% in Minnesota lakes invaded by zebra mussels and spiny water fleas, researchers concluded in a study published recently.

Led by University of Minnesota Assistant Prof. Gretchen Hansen, it becomes one of the few studies to show impacts of aquatic invasive species on high-level fish such as walleye. A summary of the study in the journal Biological Invasions said slower growth makes it more difficult for baby walleyes to survive.


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