红罗非鱼肌肉的营养成分分析

Evaluation on Nutritional Components of the Muscle in the Oreochromis niloticus×O. mossambicus

对红罗非鱼肌肉进行营养成分分析,并对其营养价值进行综合评价.结果表明,肌肉中粗蛋白含量为85.2%(干基),干物质中水解氨基酸总量为84.14%,其中必需氨基酸为35.59%,占氨基酸总量的42.30%;氨基酸价为108,第一限制氨基酸为蛋氨酸+胱氨酸(1973年FAO/WHO标准);游离氨基酸中4种呈味氨基酸含量丰富,牛磺酸高达1.13%,占游离氨基酸总量的12.39%;EPA和DHA总量占脂肪酸的5.5%;矿物质含量丰富,尤其是Se.因此认为红罗非鱼是一种营养价值和养殖价值都较高的品种.

The nutritional components of the muscle in the Oreochromis niloticus×O. mossambicus were studied and its nutritional quality was also synthetically evaluated. The results showed that its crude protein is 85.2%(dry basis), on the basis of dry matter of muscle, the amount of hydrolytic amino acids is 84.14%, in which the content of essential amino acids is 35.59 %,making up 42.30 % of total amino acids. The score of amino acid is 108 and the first limited amino acid is sulfur-containing amino acid(Met and Cys) as compared with the FAO/WHO suggested level(1973).The 4 tasty amino acids were rich in the free amino acids , and the taurine content is as high as 1.13%,which accounts for 12.39% of the total free amino acid. The EPA and DHA constitute 5.5% of the total fatty acids. There was a high content of mineral in the muscles of Oreochromis niloticus×O. mossambicus especially for Se. In conclusion, Oreochromis niloticus×O. mossambicus is one of fishes with better nutritive value and raising value.