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Tuesday, January 26 • 11:40am - 12:00pm
Chemically-Mediated Feeding Behavior In The Bigheaded Carps

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AUTHORS: Aaron Claus, University of Minnesota; Peter Sorensen*, University of Minnesota

ABSTRACT: The bigheaded carps are renowned for the efficiency with which they filter-feed using remarkably specialized gill-rakers and an epibranchial organ. But how selective are they in how they find suitable particular food in turbid river waters and if how do they locate and identify it? This study addressed these questions which have implications for their control because food could be used to attract carps or perhaps get them to selectively ingest tainted baits. The possibility that filter-feeding behavior is specific and controlled by waterborne chemicals was assayed using buccal-pharyngeal pumping (BPP) activity. While Basal BPP activity in juvenile silver and bighead carps was low (5.4 and 1.8 BPP/min), after adding a whole food mix to aquaria, rates increased over 25-fold to 146.4 +/- 15 BPP/min and 118.2 +/- 28.8 BPP/min, respectively (F(1,410)=549.096, p

Tuesday January 26, 2016 11:40am - 12:00pm EST

Attendees (6)