Ecology, Environment and Conservation Paper

Vol 26, Issue 1, 2020; Page No.(159-162)

RESPIRATORY DISTRESS OF CYPRINUS CARPIO EXPOSED TO SUB LETHAL CONCENTRATIONS OF TEXTILE BLEACHING EFFLUENT

S.Swapna

Abstract

Over stimulation or depression of respiratory activity is one of the most important manifestations of toxicity of the chemical pollutants. In this study, effect of textile bleaching effluent on the oxygen consumption rate of C. carpio was evaluated. LC50 24 hr of the effluent was calculated according to Finney’s method of probit analysis and was found to be 27.23%. Fish were divided into four groups in three replicates and exposed to 0, 1.5, 2 and 2.5% of effluent concentration for 28 days. Results showed that rate of oxygen consumption increased in the first week of exposure to effluent compared to control. From the second week of experiment, the oxygen consumption of fish started declining. A statistically significant reduction (Pˆ 0.01) in the O2 consumption was recorded in all the test individuals. Results were discussed in the light of toxicity of effluent.

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