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Monday, January 28 • 3:40pm - 4:00pm
(SYMPOSIA-06) How Do Beavers Affect Trout Populations? Well, it depends…

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AUTHORS: Troy Zorn, Michigan Department of Natural Resources Fisheries Division

ABSTRACT: Most published studies do not provide a complete understanding of the effects of beavers on trout populations and streams.  Results often vary by location, with some studies characterizing beavers as beneficial to trout populations and others indicating beavers are harmful.  Drawing on case studies throughout the Midwest and North America, I will attempt to explain what underlies these seemingly contradictory findings.  For example, groundwater availability and inputs drive many Midwestern trout streams, and a thorough understanding of these processes is critical for understanding how beaver dams will affect trout populations.  Understanding the factors that shape trout streams in other regions will provide the context needed for interpreting an array of studies examining beaver-trout relationships and will enable managers to better predict how beavers might affect trout streams in their region.

Monday January 28, 2019 3:40pm - 4:00pm

Attendees (2)