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Monday, January 28 • 1:20pm - 1:40pm
(SYMPOSIA-06) Do Beaver and Trout Really Get Along? Some Perspectives on a Long-Term Conflict Concerning Landscape Scale Riparian Management

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AUTHORS: Gary E. Whelan, Michigan Department of Natural Resources Fisheries Division

ABSTRACT: Concerns about the interactions between beavers and trout species in the Midwest have been with us for generations of fisheries and wildlife scientists.  The conflict usually centers on beavers along with riparian management that fosters their populations being a negative factor on trout populations.  While this conflict boiled in the 1990s and resulted in continuing beaver control efforts in many Midwestern states to enhance trout populations, no recent effort has been made to summarize the current knowledge about this issue and this symposium looks to address this void.   This presentation will set the stage for subsequent symposium speakers and will provide a brief overview of how beavers affect the landscape, generally positively for trout in high gradient stream systems and in a mixed way in low gradient systems.  Beavers that build dam complexes alter riparian forest types, change stream nutrient dynamics, and can alter system hydrology with resulting effects on stream fisheries which can be positive or negative for trout production depending on the landscape context.  The management of riparian zones to enhance beaver production, typically toward young succession forest types, has similar implications for trout production by changing shade and temperature dynamics.  Subsequent symposium speakers will elaborate on these points and provide attendees on the latest information on this long-term management issue.

Monday January 28, 2019 1:20pm - 1:40pm

Attendees (1)