Abstract:To determine the nutritional value of three different sizes of Ammodytes personatus, basic nutrient, amino acid, fatty acid, and inorganic element composition were systematically analyzed. The results showed that the lower the weight of A. personatus, the higher the content of moisture, ash, and crude protein and the lower the content of crude fat. Glutamate, aspartate, lysine, and leucine were the most abundant among the 17 kinds of alternative amino acids in A. personatus. The lower the sample weight, the higher the total amount of hydrolyzed and essential amino acids. According to the result of amino acid scoring (AAS) analysis, the first limiting amino acid of A. personatus was valine, and the second limiting amino acid was isoleucine. According to the result of chemistry scoring (CS) analysis, the first limiting amino acids were sulfur-containing amino acids (Met+Cys), and the second limiting amino acid was valine; the essential amino acid indices were 90.75, 85.74, and 86.04, respectively. The fatty acid compositions of the samples with different specifications were significantly different. According to the three samples of small, medium and large weight, saturated fatty acid contents were 41.71 mg/g, 60.68 mg/g, and 69.31 mg/g respectively; monounsaturated fatty acid contents were 31.81 mg/g, 65.03 mg/g, and 103.91 mg/g respectively; and polyunsaturated fatty acids (PUFA) contents were 83.17 mg/g, 110.71 mg/g, and 109.39 mg/g respectively. The larger the specification, the higher the proportion of eicosapentaenoic acid and the lower the proportion of docosahexaenoic acid in PUFA. A. personatus was found to be rich in a variety of inorganic elements needed by the human body; the contents of Na and K were the highest among the major elements, and the contents of Fe and Zn were the highest among the trace elements. This study have shown that A. personatus is a high-quality fish with high nutritional value and delicious taste.
