A 105-day feeding study was conducted to evaluate the effect of partial （0%, 20%, 40%, 60% and 80%） and complete （100%） substitution of dietary fish meal （FM） with frozen Artemia on growth performance and feed u...A 105-day feeding study was conducted to evaluate the effect of partial （0%, 20%, 40%, 60% and 80%） and complete （100%） substitution of dietary fish meal （FM） with frozen Artemia on growth performance and feed utilization of Giant freshwater prawn （Macrobrachium rosenbergii） post larvae （PL） reared in fiberglass tanks under controlled conditions. A total of 1080 M. rosenbergii PL, average weight of 6.10 ± 0.4 mg, were equally distributed over 18 fiberglass tanks, （1 m^3 each, and triplicate per treatment）. Six experimental isocaloric （14 MJ/kg/digestible energy） and isonitrogenous （35% crude protein） diets were lbrmulated. Control diet （D1, 100% FM） was formulated with FM as the main protein source （0% Artemia）. Diets D2-D6 were substituted with five dietary protein levels of frozen Artemia （20%, 40%, 60%, 80% and 100%）, respectively. Results showed that growth performance of M. rosenbergii PL fed different Artemia based diets was either equal or superior to prawn fed control FM diet. In addition, increasing dietary frozen Artemia replacement level from 20% up to 100% led to a significant （P 〈 0.05） increase in survival, growth and feed utilization, which indicate that the essential nutrient requirements needed for M. rosenbergii PL was covering with improving feed satiation of PLs. It could be concluded that frozen Artemia biomass instead of fishmeal in M. rosenbergii PL diets can improve survival rate, growth performance, feed utilization, contributing to reducing the use of FM in practical diets and the nursery phase could be shorter and more profitable.展开更多
文摘A 105-day feeding study was conducted to evaluate the effect of partial （0%, 20%, 40%, 60% and 80%） and complete （100%） substitution of dietary fish meal （FM） with frozen Artemia on growth performance and feed utilization of Giant freshwater prawn （Macrobrachium rosenbergii） post larvae （PL） reared in fiberglass tanks under controlled conditions. A total of 1080 M. rosenbergii PL, average weight of 6.10 ± 0.4 mg, were equally distributed over 18 fiberglass tanks, （1 m^3 each, and triplicate per treatment）. Six experimental isocaloric （14 MJ/kg/digestible energy） and isonitrogenous （35% crude protein） diets were lbrmulated. Control diet （D1, 100% FM） was formulated with FM as the main protein source （0% Artemia）. Diets D2-D6 were substituted with five dietary protein levels of frozen Artemia （20%, 40%, 60%, 80% and 100%）, respectively. Results showed that growth performance of M. rosenbergii PL fed different Artemia based diets was either equal or superior to prawn fed control FM diet. In addition, increasing dietary frozen Artemia replacement level from 20% up to 100% led to a significant （P 〈 0.05） increase in survival, growth and feed utilization, which indicate that the essential nutrient requirements needed for M. rosenbergii PL was covering with improving feed satiation of PLs. It could be concluded that frozen Artemia biomass instead of fishmeal in M. rosenbergii PL diets can improve survival rate, growth performance, feed utilization, contributing to reducing the use of FM in practical diets and the nursery phase could be shorter and more profitable.
