A STUDY ON THE EFFECT OF ELECTROPLATING EFFLUENT ON THE HAEMATOLOGICAL AND GENOTOXICOLOGICAL ANALYSIS OF THE FRESHWATER FISH, OREOCHROMIS MOSSAMBICUS

Author(s): Anju. K. Raj, Binu Kumari. S*, Mohan Kumar. M, Sujila. T, Drishya. M. K and Sruthi Gopinathan

Abstract: The study was carried out to investigate the acute and sublethal toxicity of electroplating effluent on haematological variables and genotoxicological changes of a fresh water fish, Oreochromis mossambicus under laboratory conditions. The 96 hour LC50 value of electroplating effluent to the fish, O.mossambicus was estimated by probit analysis method and was found to be 7.9 mg/l. (with 95% confidence limits). For sublethal studies a non-lethal dose of 1/10th of 96-hour LC50 value (0.79mg/l) was taken. During acute and chronic exposure periods, Haematological variables like RBC, Hb, PCV, MCV, MCH, MCHC were significantly decreased in fish exposed to electroplating effluent. However, a significant increase in WBC value was observed in the exposed fish during above exposure periods when compared to that of the control groups. Comet assay damage occurred with water from electroplating industry showed increase in the DNA length. The DNA damage was determined by the length of comet tail. Increased tail length parallel by a reduction head size decreasing with treating time during 21 days exposure period.

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