Nutritional Component Analysis and Quality Evaluation of Procypris merus in Guangxi
Three groups of Procypris merus(LG,QZ1 and QZ2)in Guilin of Guangxi were selected as the research objects,and their muscle nutrients(the basic nutrients,some mineral elements,amino acids and fatty acids)were analyzed,and the muscle amino acids were evaluated by amino acid score(AAS)and chemical score(CS),in order to provide data basis for the protection,development and utilization of the germ-plasm resources of P.merus in Guangxi.The results showed that the crude protein content in the fish of the three groups was rich(17.26%-18.94%).The crude protein content in LG group was significantly higher than that in the two groups of QZ1,QZ2(P＜0.05),but the total sugar content and crude lipid content of P.merus in LG group were significantly lower than that in other two groups(P＜0.05).The mineral content was abundant,and P was the highest major element in the 3 groups,followed by Ca and Mg.P and Fe contents in LG group was significantly higher than that in QZ2 group.Among the 16 amino acids detected in the 3 groups of P.merus,Glu content was the highest,followed by Asp and Lys,His and Me contents were the lowest.EAA/TAA and EAA/NEAA ratio in the 3 groups were 37.90%-38.57%and 72.89%-73.93%respectively,which was close to the ideal protein requirements,and the ratio in LG group was the highest.More than 20 kinds of fatty acids were detected in the 3 groups,and the content of palmitic acid were the highest(22.25%-28.21%).The content of all kinds of saturated fatty acids except C18∶0 and C21∶0 in LG group were higher than those in QZ1 and QZ2 groups,but the content of PUFA and EPA+DHA in QZ1 group were higher than LG and QZ2 groups.The above results indicate that the muscle protein content in P.merus was rich,the proportion of essential amino acids was close to 40%of the ideal protein requirements,and the content of polyunsaturated fatty acids was between 25.61%and 39.94%.ASS and CS scores of lysine in the fish of the three groups were the highest,which could supplement the shortage of lysine in grains and improve the utilization rate of protein in food.In summary,the results showed that the meat was delicious,nutrient-rich and balanced.LG muscle could better meet the human body's nutritional needs of high protein and low fat than QZ muscle,and the amino acid content was ric-her.The fish of P.merus in QZ group was more tender and rich in polyunsaturated fatty acids,especially QZ1 group.
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