【摘要】 采用常规方法测定了长吻鮠Leioeasis longirostris(体质量为771.8～1 047.1 g)的含肉率和肌肉营养成分。结果表明:长吻鮠的含肉率为75.69%±0.41%;肌肉(鲜样)中水分、粗蛋白质、粗脂肪和粗灰分的质量分数分别为75.82%、15.85%、5.31%和0.91%;肌肉中含有18种氨基酸,总量为62.83%(干计),其中8种人体必需氨基酸总量为25.43%(干计),占氨基酸总量的40.48%;肌肉中必需氨基酸的构成比例基本符合FAO/WHO的标准;长吻鮠的限制性氨基酸为色氨酸、缬氨酸,必需氨基酸指数为79.14,4种鲜味氨基酸总质量分数为23.89%(干计);肌肉中脂肪酸含量丰富,多不饱和脂肪酸含量达39.88%,其中EPA、DHA含量分别为3.22%、13.18%。本研究表明,长吻鮠肌肉中常量元素及微量元素含量丰富,具有较高的营养价值。更多还原

【Abstract】 The dressing rate and nutritional components were analyzed in muscle of Leiocassis longirostris(body weight 771.8-1 047.1 g) by routine methods.The results showed that there was a dressing rate of 75.69%±0.41%.The nutritive compositions(%,wet) in the muscle were found to be the moisture of 75.82%,crude protein of 15.85%,crude fat of 5.31%,crude ash of 0.91%.In the muscle,18 amino acids were detected including 8 essential amino acids for human need.In dry sample,the total content of amino acids was 62.83%,and the content of essential amino acids 25.43%,accounting for 40.48%,with the essential amino acid index(EAAI) of 79.14,exceeding the FAO/WHO criterion and close to the egg criterion.Furthermore,the content of 4 delicious amino acids was found to be 23.89%,with the first limited amino acid of Trp and the second limited amino acid of Val.There were abundant fatty acids in the muscle of Leiocassis longirostris,PUFA accounting for 39.88%,EPA 3.22%,DHA 13.18% in the total fatty acids.The muscle showed abundant macroelements and trace elements in Leiocassis longirostris which is one of the freshwater fishes with good nutritive value.更多还原