title: Effects of Endosulfan on Predator-Prey Interactions Between Catfish and Schistosoma Host Snails.
abstract: The effect of the pesticide endosulfan on predator-prey interactions between catfish and Schistosoma host snails was assessed in static tank experiments. Hybrid catfish (Clarias gariepinus × C. ngamensis) and Bulinus globosus were subjected to various endosulfan concentrations including an untreated control. The 48- and 96-h LC50 values for catfish were 1.0 and <0.5 µg/L, respectively, whereas the 48- and 96-h LC50 values for snails were 1137 and 810 µg/L. To assess sublethal effects on the feeding of the catfish on B. globosus, endosulfan concentrations between 0.03 and 1.0 µg/L were used. Predation was significantly greater (p < 0.001) in control tanks than in all other treatments. There was progressively decreasing predation with increasing toxicant concentration. Biological control of Schistosoma host snails using fish may be affected in endosulfan-polluted aquatic systems of Southern Africa because it has been found present at concentrations that are indicated to cause lethal effects on the evaluated hybrid catfish and to inhibit the predation of snails by this hybrid catfish.
authors.affiliation: Department of Aquatic Ecology and Water Quality Management, Wageningen University and Research Centre, Wageningen University, P.O. Box 47, 6700 AA, Wageningen, The Netherlands. concillia.monde@wur.nl.|Department of Zoology and Aquatic Sciences, Copperbelt University, Jambo Drive, Riverside, P.O. Box 21692, Kitwe, Zambia. concillia.monde@wur.nl.
authors.forename: Concillia
authors.initials: C
authors.lastname: Monde
authors.affiliation: Department of Plant and Environmental Sciences, Copperbelt University, Jambo Drive, Riverside, P.O Box 21692, Kitwe, Zambia.
authors.forename: Stephen
authors.initials: S
authors.lastname: Syampungani
authors.affiliation: Department of Aquatic Ecology and Water Quality Management, Wageningen University and Research Centre, Wageningen University, P.O. Box 47, 6700 AA, Wageningen, The Netherlands.|Alterra, Wageningen University and Research Centre, P.O. Box 47, 6700 AA, Wageningen, The Netherlands.
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Van den Brink
mesh_terms: D000818:Animals; D002397:Catfishes / Q000502:physiology*; D004726:Endosulfan / Q000633:toxicity*; D007306:Insecticides / Q000633:toxicity*; D011235:Predatory Behavior / Q000187:drug effects*; D012547:Schistosoma; D012908:Snails / Q000187:drug effects / Q000469:parasitology / Q000502:physiology; D018675:Toxicity Tests
chemical_list: D007306:Insecticides; D004726:Endosulfan