I. Ahmed, K. Abbas and M. Hafeez-ur-Rehman

Department of Zoology and Fisheries, University of Agriculture, Faisalabad, Pakistan                                    

Abstract 

    A project was designed to evaluate the growth performance of major carps in semi-intensive fish culture system. Two earthen ponds were selected to study the effect of rice polishing (12% crude protein) as supplementary feed in fertilized ponds on the growth of major carps. Both the ponds were manured with cowdung at the rate of 0.10gN/100g wet fish body weight daily. Each pond was stocked with 30 Labeo rohita, 15 Cirrhinus mrigala and 25 Catla catla. The treated pond was supplemented with rice polishing at the rate of 4% wet fish body weight daily for a period of six months. The other pond was taken as control. The treated pond showed a significant increase (P<0.01) in fish production. The net fish production was found to be 832.23 and 563.50 kg/ha/year in the treated and the control ponds, respectively. The treated pond showed 1.477 times greater fish production than that of the control pond. The fish showed relatively better growth during warmer months of study under both the treatments.