Replacement of fishmeal with soybean meal in diets for channel catfish, Ictalurus punctatus fry introduced in Pakistan
2008
Rab, A. (National Agricultural Research Centre, Islamabad (Pakistan). Aquaculture and Fisheries Program) | Khan, S.U. (National Agricultural Research Centre, Islamabad (Pakistan). Aquaculture and Fisheries Program) | Afzal, M. (National Agricultural Research Centre, Islamabad (Pakistan). Aquaculture and Fisheries Program) | Ali, M.R. (National Agricultural Research Centre, Islamabad (Pakistan). Aquaculture and Fisheries Program) | Qayyum, M. (University of Arid Agriculture, Rawalpindi (Pakistan). Dept. of Zoology)
Feeding trials were conducted to determine the extent fishmeal (FM) that could be replaced with soybean meal (SBM) and its possible effect on growth and body composition of channel catfish (Ictalurus punctatus) fry. Four isonitrogenous (30% crude protein) diets were formulated, containing 30%, 20%, 10% and 0% FM. SBM was incorporated in increasing percentages 10%, 20%, 30% and 40% to the respective diets. Imported floating diet (30% protein) was used as control. Fish were fed daily @ 3% of wet body weight, which was recorded biweekly. Body weight gain, specific growth rate, food conversion ratio, net protein utilization, feed efficiency ratio and protein efficiency ratio were calculated to determine the growth performance in different treatments. At the end of trial fish was subjected to proximate analysis. In aquaria fish fed with 10% FM and 30% SBM (diet3) showed significantly higher (P less than 0.05) weight gain (1.96g) than other diets but non-significant (P greater than 0.05) to control diet (diets5) i.e. 1.78g. In circular tanks, weight gain (1.08g) with same diet (diet3) was significantly higher (P less than 0.05) than other diets but less than diets (1.478). The physicochemical properties of water recorded were found to be normal for channel catfish culture. Results indicated that in a diet (30% CP) for channel catfish fry, fishmeal could be reduced up to 10% without compromising growth.
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