Respiratory response of Cirrhinus mrigala (Hamilton, 1822) fingerlings exposed to sub lethal concentration of Fenvalerate

Abstract

Pesticides are toxic to aquatic fauna, which form significant components of the food chain. In this study to estimate, the lethal concentration LC50 of fenvalerate and sub-lethal concentration of Fenvalerate on the respiratory metabolism of Cirrhinus mrigala fingerlings was recorded in laboratory condition. The median lethal concentration of fenvalerate was estimated, by exposing different concentration such as 0.01, 0.05, 0.1, 0.15 and 0.2 ppm of fenvalerate. The profit analysis, it was estimated that the LC50 value for 96 hrs for the pesticide fenvalerate was calculated as 0.025 ppm. The rate of oxygen consumption increased from 0.44 mg/g/hrs to 0.67 mg/g/hrs. When the partial pressure increase from 80 to 100 (mm/hg) in the exposed to 0.00083 ppm. The rate of oxygen consumption shoots us in 0.00083 and 0.00125 ppm concentration of fenvalarate, when compared with control. In the present investigation, the decline of oxygen consumption was observed in the subsequence exposure of Fenvalerate.