Volume 9, number 1
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Acute Toxicity and Behavioral Responses of Labeo Rohita (Hamilton) to an Organophosphate (Dichlorvos)

Bilal Ahmad Bhat1*, Imtiyaz Ahmad Bhat1, Santosh Vishwakarma1, Alok Verma2 and Geeta Saxena1

1Department of Zoology, Govt. Science and Commerce College Benazir, Bhopal - 462 008, India. 2Department of Zoology, Govt. College Lateri vidisha - 464 114, India.

ABSTRACT: Dichlorvos, a broad spectrum Organophosphate insecticide is a potential toxic pollutant, adversely affecting the fauna of aquatic ecosystem. The objective of the present work was to evaluate the acute toxicity and behavioral responses of Dichlorvos on Labeo rohita under static conditions. The median lethal concentration of the insecticide was found to be 16.71ppm and one tenth of LC50 (1.67ppm) was studied for sub acute studies. Data obtained from the Dichlorvos acute toxicity tests were evaluated using Finney's Probit Analysis statistical method. Behavioral patterns were studied in lethal (1, 2, 3 & 4 d) and sublethal concentration (1, 5, 10 & 15 d). The test fish showed erratic swimming, increased surfacing, copious mucus secretion, loss of equilibrium and hitting to the walls of test tank before finally sinking to the bottom just before death. Fish under sublethal concentration were found under stress, but that was not fatal.

KEYWORDS: Acute toxicity; Dichlorvos, LC50; Labeo rohita; Behavioral changes

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Bhat B. A, Bhat I. A, Vishwakarma S, Verma A, Saxena G. Acute Toxicity and Behavioral Responses of Labeo Rohita (Hamilton) to an Organophosphate (Dichlorvos). Biosci Biotech Res Asia 2012;9(1)
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Bhat B. A, Bhat I. A, Vishwakarma S, Verma A, Saxena G. Acute Toxicity and Behavioral Responses of Labeo Rohita (Hamilton) to an Organophosphate (Dichlorvos). Biosci Biotech Res Asia 2012;9(1). Available from: https://www.biotech-asia.org/?p=9750

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