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PLEASE NOTE: The schedule posted here is as of 1/25/16, and is subject to change. Please check back for updates.
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Wednesday, January 27 • 2:00pm - 2:20pm
Effect of Asian Carp Fecal Material on River Ecosystems

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AUTHORS: Robert Shields*, Ball State University; Mark Pyron, Ball State University

ABSTRACT: Invasive silver carp Hypophthalmichthys molitrix have been common in some US rivers for over 20 years. Effects of this invasion include alteration of phytoplankton communities, competition with native fishes, and a potential shift in functional feeding group dominance among large river fishes. The increased dominance of bethic invertivore fishes in the Wabash River after the invasion of Asian carps may be an indication that benthic invertebrate consumers utilize carp feces. We tested the effects of Asian carp fecal matter on the growth and survival of spotfin shiners Cyprinella spiloptera and freshwater snails Pluerocera spp. in mesocosm experiments. Ten shiners and ten snails were added to each of 12 experimental stream mesocosms. Half of the mesocosms received chironomid larvae (Chironomidae) while the other half received an equal mass of silver carp fecal matter. We compared body size, mass, and mortality of minnows and snails by treatment. Our results provide a more complete understanding of Asian carps in invaded ecosystems.

Wednesday January 27, 2016 2:00pm - 2:20pm EST