银大眼鲳含肉率与肌肉营养成分的分析

Analysis and Evaluation of Flesh Content and Muscle Nutritional Components of Monodactylus argenteus

为研究银大眼鲳(Monodactylus argenteus)的食用价值,采用营养测试方法对其含肉率和肌肉营养成分进行测定。结果显示,银大眼鲳含肉率为76.01%;肌肉(湿质量)中蛋白质、脂肪、灰分和水分的含量分别为18.51%、5.30%、1.28%和74.63%;肌肉蛋白质中共检测出18种氨基酸,占干质量样品总量的67.24%;必需氨基酸(8种)含量为27.54%,占总氨基酸的40.96%,与非必需氨基酸的比值为69.37%,结构符合FAO/WHO标准要求;呈味氨基酸含量为28.51%,占总氨基酸的42.40%;银大眼鲳必需氨基酸指数达到111.64,必需氨基酸组成平衡且丰富;肌肉中含有丰富的脂肪酸,多不饱和脂肪酸含量为30.90%,二十碳五烯酸(EPA)+二十二碳六烯酸(DHA)为14.55%。以上结果表明,银大眼鲳含肉率较高,肌肉中脂肪含量较高,含有丰富的氨基酸和脂肪酸,属于优质蛋白质食物,具有较高的食用价值和开发潜能。

In order to discuss the edible value of Monodactylus argenteus,the flesh content and routine nutritional components in muscle were tested and analyzed.The results showed that the flesh content in body of Monodactylus argenteus was 76.01%.The contents of protein,fat,ash and moisture in muscle were 18.51%,5.30%,1.28%and 74.63%,respectively.A total of 18 amino acids were identified in muscle,which represented 67.24%of total dry matter.The content of essential amino acid(EAA,8 species)was 27.54%,representing 40.96%of total amino acid(TAA)and 69.37%of non-essential amino acid(NEAA).The EAA composition met the FAO/WHO standard.The content of delicious amino acid(DAA)was 28.51%,representing 42.40%of TAA.The essential amino acid index(EAAI)was 111.64,which reflected that the composition of EAA was balanced and abundant.The muscle of Monodactylus argenteus was rich in fatty acid,including 30.90%polyunsaturated fatty acid(PUFA)and 14.55%EPA+DHA.The composition of elements was reasonable.It was indicated that Monodactylus argenteus belonged to high-quality protein food with abundant amino acids and fatty acids,which had high edible value and development potential.