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Effects of endosulfan pesticide on toad
Tongo Isioma1, Ezemonye Lawrence
1Department of Animal and Environmental Biology, Faculty of Life Sciences, University of Benin, Benin City, Edo State, Nigeria. isquared27@yahoo.com
Abstract:
The lethal and sublethal toxicity of Endosulfan on the African toad, Bufo regularis were evaluated to assess changes in behaviour and energy reserves. 96 hours LC50 was 0.730 mg/l while the estimated safe concentration was 0.07 mg/L indicating the high toxicity of the insecticide. Toads exposed to lethal concentrations of endosulfan showed dose-dependent behavioural abnormalities with more pronounced poisoning symptoms occurring at higher concentrations. The pesticide caused differential increase in serum glucose levels with a concomitant reduction in liver glycogen indicating disorders in carbohydrate metabolism due to pesticide induced stress and hence can serve as suitable biomarkers in pesticide toxicity studies.
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