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Mortality and Behavioural Change of Lepidocephalichthys guntea (HAM.) after Exposure to Monocrotophos (Monocil)


Affiliations
1 Department of Zoology, K. B. Women’s College, Hazaribag-825 301, Jharkhand, India
2 Environmental Toxicology Laboratory, St. Columba’s College, Hazaribag-825 301, Jharkhand, India
 

The toxic effect produced by pesticide, Monocil to hill-stream fish, Lepidocephalichthys guntea (Ham.) and its behavioural responses were studied. The experiment was designed to evaluate the toxicity of Monocil for 96 hours including non-lethal, sublethal (LC50 96 hrs) and lethal (LC50 96 hrs) concentrations. The mortality rate of the test fish was recorded at intervals of 24, 48, 72, and 96 hours. It was recorded that 22 ppm and 25 ppm were LC50 96 hrs and LC100 96 hours doses respectively. The major behavioural changes were prominent at sublethal (22 ppm) and higher doses while no apparent effect was observed at non-lethal (16ppm) dose. The prominent toxic effects of the pesticide were respiratory distress, paralysis, loss of equilibrium and finally death.
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  • Mortality and Behavioural Change of Lepidocephalichthys guntea (HAM.) after Exposure to Monocrotophos (Monocil)

Abstract Views: 124  |  PDF Views: 1

Authors

S. Marandi
Department of Zoology, K. B. Women’s College, Hazaribag-825 301, Jharkhand, India
D. N. Sadhu
Environmental Toxicology Laboratory, St. Columba’s College, Hazaribag-825 301, Jharkhand, India

Abstract


The toxic effect produced by pesticide, Monocil to hill-stream fish, Lepidocephalichthys guntea (Ham.) and its behavioural responses were studied. The experiment was designed to evaluate the toxicity of Monocil for 96 hours including non-lethal, sublethal (LC50 96 hrs) and lethal (LC50 96 hrs) concentrations. The mortality rate of the test fish was recorded at intervals of 24, 48, 72, and 96 hours. It was recorded that 22 ppm and 25 ppm were LC50 96 hrs and LC100 96 hours doses respectively. The major behavioural changes were prominent at sublethal (22 ppm) and higher doses while no apparent effect was observed at non-lethal (16ppm) dose. The prominent toxic effects of the pesticide were respiratory distress, paralysis, loss of equilibrium and finally death.