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Tuesday, February 7 • 6:00pm - 9:00pm
Poster Display. Rusty Crayfish Consumption of Silver Carp Fecal Pellets

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AUTHORS: Zachary Laughlin, Ball State University; Robert Shields, Ball State University; Dr. Mark Pyron, Ball State University

ABSTRACT: Large Midwestern U.S. rivers were invaded by Silver Carp (Hypophthalmicthys molitrix) during the past several decades. This invasive consumes and potentially alters phytoplankton communities, competes with native fishes, and likely contributed to a shift in functional trophic assemblage structure of native fishes. Recent research suggests that this invasive species affects food web structure by benthic subsidy of a novel food source via fecal matter, potentially increasing fitness of benthic consumers. We tested for effects of Asian carp fecal matter on growth and survival of rusty crayfish (Orconectes rusticus) in mesocosm experiments. One crayfish was added to each of 18 experimental mesocoms. Half of the mesocosms received chironimid larvae as food sources, and the other half received the same mass of Silver Carp fecal matter. Our results provide increased understanding for Silver Carp effects on river ecosystems.

Tuesday February 7, 2017 6:00pm - 9:00pm CST
Lancaster Ballroom

Attendees (2)