Abstract:In this work, the basic nutrients composition of the fish skeleton of the Bai Jiao Bass were analyzed. The results showed that the fish skeleton contain of mass flesh (33.17%), high protein content (16.65%) and low fatty content (3.03%). The ratio of calcium and phosphorus was nearly 2:1, which is easy to be absorbed by human body. Myofibrillar protein was the main protein in fish skeleton (45.22%), followed by sarcoplasmic protein (24.61%), alkali-soluble protein (15.55%), alkali-insoluble protein (9.46%) and non-protein nitrogen (5.15%). The fat in fish skeleton is a kind of high-quality fat mainly composed of unsaturated fatty acids (USFA, 69.86%), among which there is no significant difference in the content of monounsaturated fatty acids (MUFA, 30.193%) and polyunsaturated fatty acids (PUFA, 30.14%) in unsaturated fatty acids (p>0.05). A total of 13 free amino acids was detected in the fish skeleton, including 5 essential amino acids and 8 non-essential amino acids. In terms of the content of individual amino acids, the highest content was taurine (131.02 ng/μL), followed by alanine (45.21 ng/μL), glycine (35.68 ng/μL), and glutamate (27.50 ng/μL). On the whole, the skeleton of Baijiao bass is a kind of by-product of aquatic products with great development value.
