Biochemical changes in certain tissues of Cirrhina mrigala (Hamilton) (Cyprinidae:Cyprniformes) exposed to fenthion

S Israel Stalin ,Subhasis Das

doi:10.6088/ijes.00202030013

Abstract

Lebaycid (Fenthion), a common organochloride pesticide shows nontarget effect on the Indian carp, Cirrhina mrigala Hamilton. This study presents a brief report on the impact of incipient lethal levels (1/4th and 1/10th of fenthion on the concentration of substrates (carbohydrates, lipids and proteins) in the four important tissues brain, gill, intestine and liver. Maximum decrease in glycogen level was observed in liver tissue (−54.4/30 days) and minimum in Intestine tissue (−0.86/60days). Maximum decrease in protein levels were observed in brain tissue (−40.9/30days) and minimum in Liver tissue (1.6/60 days). Maximum and minimum decrease in lipid levels were observed in the liver tissue (−51.8/30 days and -0.5/60 days).

Highlights

Water pollution is a major problem of this century and addition of pollutants changes the natural qualities of water (Voltz et al; 2005)
Static bioassay tests were conducted to assess the toxicity of fenthion to C.mrigala fingerlings exposed to 17 different concentrations of the toxicant (2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5 and 3.6.mg/l) based on the active ingredient of the pesticide in 100 litre fibre glass tanks by allowing 10 fishesin each tank
The lipid content decreased by 51.8 percent in the liver tissue after exposure for 30 days to 1/4th 96h LC50 concentration

Summary

Introduction

Water pollution is a major problem of this century and addition of pollutants changes the natural qualities of water (Voltz et al; 2005). Pesticides are needed for the management of pests, their harmful effects on non-target organisms cannot be ignored. Pesticides leave residues in water and mud even several days after being sprayed in the adjacent crop fields. Pesticides affect growth and nutritional value of fish, when their concentration in water exceeds the critical maximum limit (Arunachalam et al; 1980). The reproductive potential of fish is affected, when reared in water containing pesticide residues (Moore and Waring, 2001). Abhilash and Prakasam (2005) reported alterations in the cellular morphology of pesticide treated fish. The physiological functions of fish get altered upon exposure to different pesticide concentrations (Gupta and Saxena, 2006). Marigoudar et al (2009) reported changes in the behavioural responses of fishes when exposed to pesticides beyond the maximum tolerance level The physiological functions of fish get altered upon exposure to different pesticide concentrations (Gupta and Saxena, 2006). Marigoudar et al (2009) reported changes in the behavioural responses of fishes when exposed to pesticides beyond the maximum tolerance level

Methods

Results

Conclusion