2种大洋性金枪鱼赤身营养价值分析与评价

Nutritional components analysis and quality evaluation of akami of two kinds of ocean tuna

对黄鳍和长鳍2种金枪鱼赤身部位肌肉的营养成分进行分析与评价。结果表明:黄鳍和长鳍金枪鱼赤身水分含量分别为72.43%和72.73%,脂肪含量分别为0.54%和0.19%,蛋白质含量为25.21%和26.63%,灰分含量为1.32%和1.53%,均含有丰富的矿物质元素;黄鳍和长鳍金枪鱼赤身多不饱和脂肪酸含量高,尤其是DHA含量可高达28.84%和29.83%。黄鳍和长鳍金枪鱼赤身氨基酸配比合理,必需氨基酸含量分别为40.70%和41.70%,必需氨基酸指数(EAAI)分别为92.62和95.00,并含有丰富的呈味氨基酸,其含量分别为40.81%和42.31%。因此,2种金枪鱼赤身肌肉蛋白含量高,脂肪含量低,具有较高的营养价值。

In this paper, nutrients of akami muscle of two tuna （ Thunnus albacores, Thunnus alalunga） were analyzed and evaluated. The results show that： 1 ） the moisture content of T. albacares and T. alalung was 72.43% , 72.73%; fat was0.54%,0.19%; protein was 25.21%, 26.63%; ash wasl. 32%, 1.53%. The akami of two tu- na all had rich content of mineral element. 2 ） The akami of T. albacares and T. alalung had higher content of poly- unsaturated fatty acids, especially DHA content can be as high as 28.84% , 29.83%. 3） The akami of T. albacares and T. alalung had a reasonable amino acids ratio. Essential amino acids content was 40.70% , 41.70% , and EAAI was 92.62, 94.97. It was rich in flavor forming amino acids, the content was 40.81% , 42.31%. Therefore, the akami of two tuna had higher protein content and low fat content and were very nutritious.