沙光鱼肌肉营养成分分析及营养学评价

Composition Analysis and Nutritional Evaluation of Acanthogobius hasta Muscle

测定连云港特产鱼类——沙光鱼的肌肉营养成分并对其进行营养学评价。沙光鱼的肌肉(鲜样)中水分、粗脂肪、粗蛋白和粗灰分分别为76.32%、1.52%、18.06%和1.23%。沙光鱼肌肉共检测出18种氨基酸,其中,谷氨酸含量最高,达到2.27%,必需氨基酸占总氨基酸的比值为46.79%,必需氨基酸和非必需氨基酸的比值为87.93%。沙光鱼的必需氨基酸评分和化学评分表明其第一限制性氨基酸为色氨酸。必需氨基酸指数为75.95。单不饱和脂肪酸(MUFA)、多不饱和脂肪酸(PUFA)、二十碳五烯酸(EPA)+二十二碳六烯酸(DHA)在总脂肪中含量分别为37.97%、22.20%和10.20%。以上结果表明沙光鱼营养价值较高、并具有保健作用,具有较好的开发前景。

The muscle of A.hasta living in the sea area near Lianyungang was subjected to composition analysis and nutritional evaluation.The contents of moisture,crude fat,crude protein,and crude ash in the muscle of A.hasta were 76.32%,1.52%,18.06% and 1.23%,respectively.Eighteen common amino acids were found in the muscle of A.hasta,among which glutamic acid content was the highest （2.27%）,and the ratios of total essential amino acids to total amino acids （WEAA/WTAA） and to non-essential amino acids were 46.79% and 87.93%,respectively.According to the nutritional evaluation on amino acid score （AAS） and chemical score （CS）,the first limited amino acid was tryptophan.The essential amino acid index （EAAI） was 75.95.The values of monounsaturated fatty acids （MUFA）,polyunsaturated fatty acids （PUFA）,and eicosapentaenoic acid （EPA） plus docosahexaenoic acid （DHA） were 37.97%,22.20%,and 10.20%,respectively.These results indicate that A.hasta muscle possess high nutritional value and health care function and thus,has promising prospects for further development.