3种石斑鱼肌肉营养成分比较初探

林建斌; 陈度煌; 朱庆国; 梁萍; 秦志清

3种石斑鱼肌肉营养成分比较初探

Nutritional quality and composition in flesh of three species of groupers

摘要

摘要: 对赤点石斑鱼、青石斑鱼、点带石斑鱼进行营养成分分析和营养价值比较评价。结果表明,青石斑鱼肌肉中的粗蛋白含量为21.76%,分别高出点带石斑鱼和赤点石斑鱼7.67%、11.99%;赤点石斑鱼的氨基酸总量、必需氨基酸总量、4种鲜味氨基酸总量分别为67.94%、27.35%、26.30%(以干物质计),青石斑鱼的分别为72.25%、30.58%、26.90%,点带石斑鱼的分别为73.38%、30.77%、27.53%。点带石斑鱼的氨基酸、必需氨基酸含量最高。鲜味氨基酸占总氨基酸的比例以赤点石斑鱼最高,达38.71%。3种石斑鱼的氨基酸评分(AAS)、化学评分(CS)均非常接近,必需氨基酸指数(EAAI)明显高于其他经济鱼类,以赤点石斑鱼最高,达85.71。赤点石斑鱼和青石斑鱼EPA+DHA含量分别达到20.4%、20.5%,明显高于点带石斑鱼。3种石斑鱼都是营养价值高的优质鱼类,三者之间的营养价值基本接近,但是鲜美度以赤点石斑鱼和青石斑鱼较佳。

Abstract: The nutritional contents in the muscle of Epinephlus akaara,E.awoara and E.coioides were analyzed and evaluated.Protein content of the fresh muscle of E.awoara(21.76%) was higher than that of E.akaara(19.15%) or E.coioides(20.21%).The contents of total amino acids(TAA),essential amino acids(EAA) and flavoring amino acids(FAA) in dry weight fish flesh were 67.94%,27.35% and 26.30%,respectively,in E.akaara,72.25%,30.58% and 26.90%,respectively,in E.awoara,and 73.38%,30.77% and 27.53%,respectively,in E.coioides.The FAA to TAA ratio in E.akaara was the highest among the three groupers(38.71%).The amino acids score(AAS) and chemical score(CS) showed no significant difference among the three species.The EAA index of E.akaara was the highest(85.71) among the three groupers.The EPA+DHA contents in E.akaara and E.awoara were 20.4% and 20.5%,respectively,and they were higher than that in E.coioides.The results indicated that the three different species of groupers were nutritive and delicious seafood.Their nutritional values were similar,but the flavor of E.akaara and E.awoara appeared to be more desirable than that of E.coioides,based on their FAA contents.

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