弧唇裂腹鱼肌肉营养成分分析
Nutritional composition in muscle of Schizothorax curvilabiatus
为探究弧唇裂腹鱼(Schizothorax curvilabiatus)肌肉营养成分及其风味品质,采用化学分析方法测定了其常规营养成分、氨基酸和脂肪酸的组成,旨为弧唇裂腹鱼的种质资源保护、人工驯养及营养研究等提供基础数据。结果表明弧唇裂腹鱼肌肉中水分、灰分、粗蛋白和粗脂肪含量分别为79.05%、1.20%、18.55%和1.15%。共检测出16种氨基酸,占肌肉总量的14.0%,其中必需氨基酸7种,占肌肉总量的5.87%,占氨基酸总量的42.1%。氨基酸评分(AAS)结果表明,(蛋氨酸+半胱氨酸)(Met+Cys)为第一限制氨基酸,缬氨酸为第二限制限制氨基酸;化学评分(CS)结果表明,(苯丙氨酸+酪氨酸)(Phe+Tyr)为第一限制氨基酸,缬氨酸(Val)为第二限制氨基酸。弧唇裂腹鱼的必需氨基酸指数(EAAI)为68.42。鲜味氨基酸4种,占肌肉总量的5.34%,占氨基酸总质量分数的38.14%。共检测出18种脂肪酸,其中不饱和脂肪酸占脂肪酸总量的43.99%。其中动脉粥样硬化指数和血栓形成指数分别为0.45、0.125。综合分析结果表明,弧唇裂腹鱼肌肉中蛋白质含量丰富,富含多种呈味氨基酸和不饱和脂肪酸,是一种优质的蛋白质及脂肪来源,具有良好的风味和较高营养价值。
In order to explore the muscle nutrient composition and flavor quality of S.curvilabiatus, the conventional nutrients, amino acids and fatty acids were determined by chemical analysis methods, aiming to provide basic data for the germplasm protection, artificial domestication and nutrition research of the S.curvilabiatus. Results showed that the contents of water, ash, crude protein and crude fat in muscle of the fish were 79.05%, 1.20%, 18.55% and 1.15% respectively. 16 kinds of amino acids were detected, accounting for 14.0% of the total muscle, including 7 kinds of essential amino acids, accounting for 5.87% of the total muscle and 42.1% of the total amino acids. According to nutrition evaluation in amino acid score (AAS) and chemical score (CS), the first limited amino acids were Met+Cys and Phe+Tyr, and the second limited amino acid was Val; the essential amino acids index (EAAI) was 68.42. In sample, the content of 4 kinds of delicious amino acids was 5.34%, and the percentage of delicious amino acids in total amino acids was 38.14%. Its muscles contain 18 fatty acids, and unsaturated fatty acids accounted for 43.99% of the total fatty acids, moreover, index of atherogenicity (IA) and index of thrombogenicity (IT) were 0.45 and 0.125 respectively. The comprehensive analysis results show that the muscle of S.curvilabiatus is rich in protein, rich in a variety of flavor amino acids and unsaturated fatty acids. It is a high⁃quality source of protein and fat, with good flavor and high nutritional value.
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公益性行业(农业)科研专项(201403012)
农业财政专项“西藏重点水域渔业资源与环境调查”
中央级公益性科研院所基本科研业务费专项(2020TD07)
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