Impact of silver and bighead carps on plankton communities of channel catfish ponds |
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| Affiliation: | 1. U.S. Geological Survey, Mississippi Cooperative Fish and Wildlife Research Unit, P.O. Box 9691, Mississippi State, MS 39762, USA;2. Department of Wildlife, Fisheries and Aquaculture, P.O. Box 9690, Mississippi State, MS 39762, USA;3. U.S. Army Corps of Engineers, Engineer Research and Development Center, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA;1. Department of Mathematics and Statistics, South Dakota State University, Brookings, SD, United States;2. Department of Natural Resource Management, South Dakota State University, Brookings, SD, United States;1. Fisheries and Oceans Canada, Pacific Biological Station, Nanaimo, British Columbia, 3190 Hammond bay Road, Canada V9T 6N7;2. School of Resource and Environmental Management, Simon Fraser University, 8888 University Drive, Burnaby, BC, Canada V5A1S6;3. Co-operative Resource Management Institute, Fisheries & Oceans Canada / Pêches et Océans Canada, 8888 University Drive, Burnaby, BC, Canada V5A1S6;1. Institut Méditerranéen de Biodiversité et d''Ecologie Marine et Continentale, UMR 7263, Aix-Marseille Université, CNRS, IRD, Univ. Avignon, Faculté des Sciences et Techniques de Saint-Jérôme, 13397 Marseille cedex 20, France;2. School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA |
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| Abstract: | Stocking of ponds with planktivorous carps in polyculture with channel catfish (Ictalurus punctatus and a hybrid) reduced the density of zooplankton when compared to controls. Bighead (Aristichthys nobilis) and silver carp (Hypophthalmichthys molitrix) similarly reduced zooplankton, though the mechanism of suppression may be different. Phytoplankton biomass was significantly higher in ponds containing bighead and silver carp. Ammonia and nitrite concentrations were similar in bighead and silver carp ponds and were significantly lower than in control ponds. |
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