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采用国标(GB)检测方法,依据FAO/WHO的评价规定,对2010年发现于常德珊珀湖后经人工选育的金鳙和2015~2016年采样于常德珊泊湖的黑鳙(Aristichthys nobilis)进行肌肉营养成分分析和评价。结果表明,金鳙肌肉鲜样的水分、粗蛋白、粗脂肪、灰分水平分别为76.1%、20.6%、0.52%、1.1%,黑鳙的相应指标为76%、19.8%、0.48%、1.2%,其中两者间粗脂肪含量有显著性差异。金鳙和黑鳙的肌肉干样中17种氨基酸总含量分别为88.69 g/100 g和87.68 g/100 g、鱼类必需氨基酸含量为43.2 g/100 g和42.63 g/100 g、呈味氨基酸含量为32.52 g/100 g和32.32 g/100 g,没有显著性差异。两者肌肉氨基酸含量高低的排序也一致,含量最高的均为Glu,其次为Asp、Lys、Leu,含量最低的为Pro;必需氨基酸中含量最高的是Lys、Leu,最低的是Met。两种鳙鱼间除2种含硫氨基酸(Met、Cys)和组氨酸(His)含量有显著性差异外,其他氨基酸含量基本一致。从AAS和CS评分值可见,两者的限制性氨基酸均为Val、Ile或Thr。两者的必需氨基酸指数(EAAI)为80.47和80.13。研究说明,人工选育的金鳙具有与天然水域鳙鱼相当的营养品质。
According to the evaluation criteria of FAO / WHO, the GB (GB) method was used to test the quality of Aristichthys nobilis collected from Artemisia selengensis ) For muscle nutrient composition analysis and evaluation. The results showed that the moisture, crude protein, crude fat and ash of fresh muscle samples were 76.1%, 20.6%, 0.52% and 1.1%, respectively. The corresponding indexes of black muscle were 76%, 19.8%, 0.48% and 1.2% , Of which there is a significant difference between the two crude fat content. The total contents of 17 kinds of amino acids in the dried muscle samples of Jinliu and blackbirds were 88.69 g / 100 g and 87.68 g / 100 g respectively, and the essential amino acids contents of fish were 43.2 g / 100 g and 42.63 g / 100 g, Content of 32.52 g / 100 g and 32.32 g / 100 g, no significant difference. The order of muscle amino acid content was also the same, Glu was highest, followed by Asp, Lys and Leu, Pro was the lowest, and Lys and Leu were the highest among essential amino acids. Met was the lowest. The contents of other amino acids except the two sulfur-containing amino acids (Met, Cys) and histidine (His) were significantly different between the two species of mandarin fish. As can be seen from the AAS and CS scores, the limiting amino acids of both are Val, Ile or Thr. The essential amino acid index (EAAI) for both was 80.47 and 80.13. Research shows that artificial selection of golden pomfret has the same nutritional qualities as the natural pomfret.