EFFECT OF TANNERY EFFLUENT ON THE BIOCHEMICAL-CONSTITUENTS OF THE FRESH-WATER PRAWN, MACROBRACHIUM-LAMARREI-LAMARREI (H-MILNE EDWARDS)

The effect of tannery effluent on the biochemistry of freshwater prawn Macrobrachium lamarrei lamarrei was studied. The experiment was desig ned for 120 hacute toxicity at different concentration of effluent suc h as 0.5, 1.5, 2.0, 2.5, 3.0 and 3.5%. The tentative observation endin g 24 h exposure with the tannery effluent concentration of 0 to 5% at on interval of 0.5% revealed that no mortality at 0.5% level and 100% mortality was observed above 3.5% level. During the experimental perio d the protein, carbohydrate and lipid content in the hepatopancreas, m uscle and ovary of the animals were observed in every 24 h by sacrific ing three treated animals in each concentration for analysis. The resu lt revealed a gradual decrease in the proximate constituents of the an imals in respect of duration and concentration.