Analysis of nutrient components and evaluation of nutritive quality in the muscle of Oplegnathus fasciatus.

Nutrient components in the muscle of Oplegnathus fasciatus were investigated in this study.The results showed that the content of moisture,crude ash,crude protein and crude fat in fresh muscle of O.fasciatus were 78.08% ,16.86% ,3.02% ,0.55% and 1.49% ,respectively.The content of energy was 5.43 kJ/g,and E/P was 32.24 kJ/g.Nineteen amino acids were found in the muscle of O.fasciatus,including eighteen common amino acids ( eight essential amino acids,two half-essential amino acids and eight nonessential amino acids) and Taurine.In dry sample,the total content of amino acids was 77.88% ; The total content of eighteen common amino acids ( TAA) was 77.26% ,the content of essen-tial amino acids ( EAA) ,half-essential amino acids ( HEAA) and nonessential amino acids ( NEAA) were 32.11% ,6.82% and 38.33% ( to total common amino acids) ,respectively.Four kinds of delicious amino acids accounted for 30.19% in dry sample; the ratio of total delicious amino acids to total amino acids [w( DAA)/w( TAA) ]was 39.08% .The essential amino acids index ( EAAI) was 64.43,the con-tent of the different amino acids was stable and the constitutional rate of the essential amino acids met the FAO/WHO Standard.The first limited amino acids was Trp and the second limited amino acids were Met+Cys and Thr.Essential amino acids gram to total nitrogen gram ( E/TN) was 2.57,by nutrition evaluation for the amino acids in muscle to human needs.The contents of EPA and DHA in fatty acids were 1.76% and 15.10% ,respectively.The composition of mineral elements in the muscle of O.fasciatus were rich,in terms of Zn ( 58.9 μg·g-1) and Se ( 3.96 μg·g-1) especially.