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Chlorpyrifos-induced Histopathological Alterations in Duttaphrynus melanostictus (Schneider 1799) Tadpoles: Evidence from Empirical Trials

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dc.contributor.author Bandara, M. G. D. K.
dc.contributor.author Wijesinghe, M. R.
dc.contributor.author Ratnasooriya, W. D.
dc.date.accessioned 2022-03-24T07:28:49Z
dc.date.available 2022-03-24T07:28:49Z
dc.date.issued 2012
dc.identifier.citation Bandara, M. G. D. K., Wijesinghe, M. R., Ratnasooriya, W. D.(2012).Chlorpyrifos-induced Histopathological Alterations in Duttaphrynus melanostictus (Schneider 1799) Tadpoles: Evidence from Empirical Trials, Journal of Tropical Forestry and Environment Vol. 2, No. 02 (2012) 27-36 en_US
dc.identifier.uri http://dr.lib.sjp.ac.lk/handle/123456789/10833
dc.description.abstract This paper reports the histopathological responses of the gill, liver and tail muscle tissues in tadpoles of the Asian Common Toad Duttaphrynus melanostictus (Schneider, 1799) exposed to chlorpyrifos a common organophosphorus pesticide. Tadpoles of Gosner stages 24-26 were continuously exposed to low, mid and high (500, 1000 and 1500 μgl–1) concentrations of chlorpyrifos for two weeks. Histological alterations in the tissues of the surviving larvae were microscopically examined both at the end of the exposure period and after a week following the final exposure. Several histological alterations were noted in the gills, liver and tail muscles of the larvae exposed to 1500 μgl–1 of chlorpyrifos. The gills of exposed larvae showed architectural distortion resulting from reduced primary and secondary gill lamellae and blood vessels, and alterations in the gill epithelium. In the liver sinusoidal congestion and dilation, cytoplasmic vacuolation and changes in hepatocytes such as hyperchromatic nuclei and nuclear fragmentation were observed. The tail muscle tissue suffered from severe atrophy and myotomal disintegration. Although histological alterations in the gill and liver tissues were noted only at the high concentration, changes in the muscle tissue i.e. muscle degeneration and atrophy, were apparent at both low and mid concentrations. The degree of damage in surviving larvae in a week following the final exposure was lower than that observed during the exposure, probably indicating recovery or resistance. The findings of the present study emphasize the need to investigate possible sublethal damage induced by pesticides in amphibians inhabiting agricultural habitats. en_US
dc.language.iso en en_US
dc.publisher Department of Forestry and Environmental Science University of Sri Jayewardenepura en_US
dc.subject Chlorpyrifos, gills, histopathology, liver, muscles, tadpoles en_US
dc.title Chlorpyrifos-induced Histopathological Alterations in Duttaphrynus melanostictus (Schneider 1799) Tadpoles: Evidence from Empirical Trials en_US
dc.type Article en_US
dc.identifier.doi https://doi.org/10.31357/jtfe.v2i2.592 en_US


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