Journal of Environmental Biology

Effects of dimethoate (30% EC), an organophosphate pesticide

on liver of common carp, Cyprinus carpio

Ram Nayan Singh

Department of Zoology, Kamla Nehru Institute of Physical and Social Sciences, Sultanpur- 228 118, India

*Corresponding Author email : rnsingh_zool@rediffmail.com

Publication Data

Paper received:

21 July 2011

Revised received:

12 January 2012

Re-revised received:

08 May 2012

Accepted:

26 July 2012

Abstract

Organ histopathology and changes in biochemical parameters in fish are good biomarkers of aquatic pollution. This study is an attempt to assess the effects of dimethoate, an organophosphate insecticide on the liver of common carp (C. carpio). Healthy individual fish were exposed to 0.40 mg l^-1?(25% of 96 hr LC50) concentration of dimethoate, for short term (96 hr). Liver of the exposed fish exhibited alterations like disruption of regular arrangement of hepatocytes, congestion and rupture of vessels; hemorrhage, cytoplasmic vacuolization, pyknotic nuclei and necrosis. Biochemical parameters viz. total liver protein (p<0.001) and liver glycogen (p<0.001) registered a significant decrease and blood glucose (p<0.001) exhibited significant increase throughout exposure.

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Key words

Toxicity, Histopathology, Common carp, Organophosphate, Dimethoate

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