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Record number 501711
Title Effects of Endosulfan on Predator–Prey Interactions Between Catfish and Schistosoma Host Snails
Author(s) Monde, Concillia; Syampungani, Stephen; Brink, Paul J. van den
Source Archives of Environmental Contamination and Toxicology 71 (2016)2. - ISSN 0090-4341 - p. 257 - 266.
DOI https://doi.org/10.1007/s00244-016-0275-7
Department(s) Aquatic Ecology and Water Quality Management
Alterra - Environmental risk assessment
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 2016
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 50 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.

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