The Toxicity Effect of MONOCROTOPHOS 36% E.C on The Biochemical Changes Labeo Rohita (Hamilton, 1882)

Pesticides are stable compounds and they enter the aquatic ecosystem through the agriculture run off. The evaluation of nature and degree of harmful effects produced by toxic substance in the aquatic organisms are evaluated by toxic tests. The 96 hour LC50 values have generally been found to be satisfactory for the measurement of acute toxicity. The differences in 96 hours LC50 of the same toxicant in different fishes may be attributed to individual traits including those of behavior and additional structure such as accessory respiratory organs. The individual characters such as size and weight, sex and biological behavior are important determination for variation in LC50 values.Therefore the present study is an attempt to study the toxicity of the pesticide with respect to biochemical of carbohydrate, protein, lipid of fish Labeo rohita (Ham). The Monocrotophos affects not only fishes but also organisms in the food chain through the process of consumption of one by the other. The pesticide, which enters the body tissues of the fish, affects the physiological activities.