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Survival and cholinesterase activity of Asian common toad (Duttaphrynus melanostictus) tadpoles following short term exposure to a carbosulfan-based pesticide

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dc.contributor.author Samarakoon, H.M.T.R.
dc.contributor.author Pathiratne, A.
dc.date.accessioned 2017-10-27T06:56:41Z
dc.date.available 2017-10-27T06:56:41Z
dc.date.issued 2017
dc.identifier.citation Samarakoon, H.M.T.R., and Pathiratne, A., (2017). Survival and cholinesterase activity of Asian common toad (Duttaphrynus melanostictus) tadpoles following short term exposure to a carbosulfan-based pesticide, Sri Lanka Association of Fisheries and Aquatic Resources. Vol 22 (1). en_US
dc.identifier.uri http://repository.kln.ac.lk/handle/123456789/17912
dc.description.abstract Carbosulfan, a carbamate pesticide widely used in agriculture especially in the Asian region has received less attention in ecological impact assessments particularly to non-target amphibians. In this study, short term effects of a carbosulfan-based pesticide (Marshal®) on survival and cholinesterase (ChE) activity of tadpoles of Duttaphrynus melanostictus, a non-target amphibian in tropical Asia were evaluated. Based on the concentration-toxicity response patterns, estimated median lethal concentration (LC50) and median ChE inhibitory concentration (IC50) for 96 h were 24 and 2.1 mg/L carbosulfan respectively. For the ChE inhibition for 96 h, the lowest observable effect concentration and no observable effect concentrations of carbosulfan were 0.6 and 0.3 mg/L respectively. Upon transfer to pesticide-free water by 14 days, ChE activities of the tadpoles were restored to normal levels. Since the tadpoles exposed to 0.3 mg/L carbosulfan have not exhibited lethality, morphological deformities, abnormal behavior or statistically significant ChE depression, it is unlikely that the carbosulfan-based pesticide could induce neurotoxic effects for D. melanostictus tadpoles at the concentration of ≤ 0.3 mg/L of active ingredient under short term exposure. en_US
dc.language.iso en en_US
dc.publisher Sri Lanka Association of Fisheries and Aquatic Resources. en_US
dc.subject Carbamate pesticide en_US
dc.subject Carbosulfan en_US
dc.subject Cholinesterase en_US
dc.subject Tadpole en_US
dc.title Survival and cholinesterase activity of Asian common toad (Duttaphrynus melanostictus) tadpoles following short term exposure to a carbosulfan-based pesticide en_US
dc.type Article en_US


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