essential amino acid digestibility of different ingredients in striped catfish (pangasianodon hypophthalmus) diet

CANTHO UNIVERSITY COLLEGE OF AQUACULTURE AND FISHERIES LY MINH QUAN ESSENTIAL AMINO ACID DIGESTIBILITY OF DIFFERENT INGREDIENTS IN STRIPED CATFISH (Pangasianodon hypophthalmus) DIET A thesis submitted in a partial fulfillment of the requirements for the degree of Bachelor of science in Aquaculture Cantho, December 2014 0 ESSENTIAL AMINO ACID DIGESTIBILITY OF DIFFERENT INGREDIENTS IN STRIPED CATFISH (Pangasianodon hypophthalmus) DIET Ly Minh Quan, Tran Thi Thanh Hien Department of Nutrition and Aquatic Product Processing College of Aquaculture and Fisheries, Can Tho University ABSTRACT Striped catfish (Pangasianodon hypophthalmus) is a dominated aquaculture species in Mekong Delta, Vietnam which its production accounted for 1.2 million tons in 2013. Feed used for striped catfish aquaculture was estimated up to 2 million tons. Balancing the amino acid profile of the diet with free amino acids can be conducted as a cost-effective strategy to reduce not only fish meal incorporation level but also protein level of the diet, improve fish growth performance. The experiment was conducted to determine the digestibility of amino acid in different common ingredients used for catfish fingerlings (90 g/fish) diets which contributed to formulate diets on basis of total amino acids to reduce variability catfish‘s requirement. Reference diet contained fishmeal (26%), soybean meal (48%), wheat flour (20%), squid oil (2%), premix (1%) and chrome oxide (1%) whereas experimental diets were formulated as 70% reference diet plus 30% of each common ingredients (fishmeal, defatted soybean meal, rice bran meal, defatted rice bran meal, wheat bran meal). The apparent coefficients digestibility (ADC) was calculated for the EAA (essential amino acids) in each ingredients and feces. 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