雌雄鲦肌肉营养成分的分析比较

Comparative analyses of nutritional composition in muscle of male and female Hemicculter Leuciclus

对雌雄鲦(Hemicculter Leuciclus)肌肉营养成分进行了分析比较,并对其营养品质进行了评价。结果表明:雌雄鲦肌肉粗蛋白含量分别为18.20%,18.80%;雌雄鲦氨基酸总含量为18.91 mg/g、20.14mg/g,雌雄鲦必需氨基酸(EAA)、呈味氨基酸(FAA)与氨基酸总量的比值无显著差异;雌鲦的EAAI分值(60.24)略低于雄鲦(62.23)。根据氨基酸评分时,鲦的第一限制性氨基酸为蛋氨酸+胱氨酸,第二限制性氨基酸为苏氨酸,而根据化学评分时,鲦的第一限制性氨基酸为蛋氨酸+胱氨酸,第二限制性氨基酸为酪氨酸+苯丙氨酸。研究表明鲦的营养价值较高,具有较好的食用价值。

Nutrient components in the muscle of male and female Hemicculter Leuciclus were investigated. Sample fish were collected from Yuqiao Reservoir. The results showed that the content of crude protein in fresh muscle of female and shale Heznicculter Leuciclus werel8. 20% and 18. 80% respectively. The total content of amino acids of female and male Hemicculter Leuciclus was 18.91 rag/g, 20.14 mg/g, Essential amino acid （EAA）/ Total amino acid （TAA） and four kinds of flavor amino acid（FAA）/Total amino acid （TAA）of male and female Hemicculter Leuciclus were no differences. The essential aminoacids index（EAAl）of female Hernicculter Leuciclus was 60.24,a little lower than that of male HemicculterLeuciclus （62.23）. According to the amino acids score（AAS） , the first lim- ited amino acid of Hemicculter Leuciclus are Methionine（Met） ＋ Cystine（Cys） and the second limited amino acid is Threonine（Thr）. But according to the basis of chemical score（CS）, the first limited ami- no acid of Heznicculter Leuciclus are Methionine ＋ Cystine （Met＋Cys） and the second limited amino acid is Phenylalanine ＋ Tyrosine （Phe＋Tyr）. It was indicated that Hemicculter Leuciclusis is a high quality food fish for human,and it could be a potential aquaculture species.