Evaluation of an Approach to Integrated Pest Management of Bighead Carps and Silver Carps

Wednesday, August 20, 2014: 8:40 AM
2101 (Centre des congrès de Québec // Québec City Convention Centre)
Mark P. Gaikowski , Upper Midwest Environmental Sciences Center, US Geological Survey, La Crosse, WI
Ryan Adams , USGS Illinois Water Science Center, De Kalb, IL
Robin D Calfee , Columbia Environmental Research Center, US Geological Survey, Columbia, MO
James Duncker , USGS Illinois Water Science Center, Urbana, IL
David Glover , Aquatic Ecology Laboratory, The Ohio State University, Columbus, OH
Kevin Irons , Aquaculture and Aquatic Nuisance Species Program Manager, Illinois Department of Natural Resources, Springfield, IL
Patrick Kocovsky , Great Lakes Science Center, Lake Erie Biological Station, US Geological Survey, Sandusky, OH
Edward E Little , Columbia Environmental Research Center, US Geological Survey, Columbia, MO
Elizabeth Murphy , Illinois Water Science Center, U.S. Geological Survey, Urbana, IL
Michael J. Parsley , Columbia River Research Laboratory, US Geological Survey, Cook, WA
Jose Rivera , Center for Fisheries, Aquaculture, and Aquatic Sciences, Southern Illinois University, Carbondale, IL
Multiple investigations are developing methods to manage invasive Bighead Carp Hypophthalmichthys nobilis and Silver Carp H. molitrix that are spreading through the Mississippi River basin and threatening to invade others. This project integrated several methods to increase removal of Bighead Carp and Silver Carp from a backwater along the Illinois River near Morris, IL and to evaluate the efficacy of integrated pest management. Mobile hydroacoustic surveys were used to characterize the distribution of fish within the backwater then algal feeding attractants were injected at predetermined locations. A water gun barrier was established at the narrowest location of the backwater about 14 h before commercial fishing commenced.  The presence and distribution of fish near the water gun barrier was assessed by fixed and mobile split-beam hydroacoustic transducers. Mobile hydroacoustic surveys, algal feeding attractant injection and water gun barrier operation continued through 3 consecutive days of commercial fishing. Commercial fishers harvested fish via gillnets in predetermined zones on each day and recorded harvest by species, location and date. Presence of fish near the barrier and the change in fish distribution within the backwater as a function of algal feeding, water gun barrier operation and commercial fishing pressure was assessed.