Please use this identifier to cite or link to this item:
http://repository.kln.ac.lk/handle/123456789/17912
Title: | Survival and cholinesterase activity of Asian common toad (Duttaphrynus melanostictus) tadpoles following short term exposure to a carbosulfan-based pesticide |
Authors: | Samarakoon, H.M.T.R. Pathiratne, A. |
Keywords: | Carbamate pesticide Carbosulfan Cholinesterase Tadpole |
Issue Date: | 2017 |
Publisher: | Sri Lanka Association of Fisheries and Aquatic Resources. |
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). |
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. |
URI: | http://repository.kln.ac.lk/handle/123456789/17912 |
Appears in Collections: | Zoology |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.