UTTAR PRADESH JOURNAL OF ZOOLOGY

The present study deals with the effect of dye industry effluent on growth and biochemical changes of common carp Cyprinus carpio var. communis grown for a period of 40 days. The dye industry effluent was collected from Chinnalapati, Dindi gul, Tamil Nadu, India. Physico-chemical characteristics of dye industry effluent such as colour, pH, electrical conductivity, total Solids, total dissolved solids, total suspended solids, total hardness, alkalinity, Sodium, potassium, calcium, chloride, dissolved oxygen, dissolved carbon dioxide, BOD and COD were estimated. For the present study common carp C. carpio (1.24 + 0.2 g) was collected from Pandian Fish Farm, Dindigul. Tamil Nadu, India. Trainee feed and experimental feed were prepared based on the protein content. Different concentrations of dye industry effluent on the survival of the carp shows that the LCso at 96 hr exposure was found as 63%. Different sub-lethal concentrations of dye industry effluent such as 5, 10, 15 and 20% were utilized for growth studies. Feed consumption was higher in control and lower in Ex. IV containing 20% of dye industry effluent. Feed conversion efficiency, feed conversion ratio, growth, percentage growth, relative growth rate, assimilation, gross and net growth efficiency were lower in Ex. V. Metabolism was higher in Ex. IV containing 20% dye industry effluent. Protein, carbohydrate and lipid content in the muscle of C. carpio was decreased when the concentration of effluent increased. From the results it is inferred that the feed utilization parameters of Common carp was decreased with increasing concentration of dye industry effluent.