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Tuesday, January 30 • 6:00pm - 9:00pm
Poster Display. Prey Electivity of the Slimy Sculpin Within the Lake Superior-North Watershed

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AUTHORS: Casey W. Schoenebeck, University of Nebraska at Kearney and Minnesota Department of Natural Resources; Jonathon Newkirk, University of Nebraska at Kearney and Minnesota Pollution Control Agency

ABSTRACT: We evaluated the prey electivity of lotic Slimy sculpin Cottus cognatus within the Lake Superior-North watershed, an area characterized by high gradient streams and lacking the preferred prey of Gammarus. Fish and macroinvertebrates were sampled at 67 sites within 52 rivers and streams during 2013 in the Lake Superior-North watershed by the Minnesota Pollution Control Agency. Fish sampling was conducted with the use of backpack and stream bank electrofishers, and macroinvertebrates were collected using qualitative multi-habitat sampling within D-Frame kick nets. Feeding electivity was calculated using Strauss’s modified feeding electivity model. In total we sampled 174 Slimy sculpins within the Lake Superior-North watershed and found sculpins positively selected for Hydropsychidae and Perlidae, while avoiding abundant Chironomidae.

Tuesday January 30, 2018 6:00pm - 9:00pm CST
Ballroom C & Foyer

Attendees (1)