3种人工养殖石斑鱼肌肉的蛋白质营养价值评价

Protein Nutritional Value Evaluation in Three Species of Cultured Groupers' Muscle

[目的]对3种人工养殖石斑鱼肌肉氨基酸含量进行分析,评价石斑鱼的营养价值。[方法]对人工养殖并投喂配合饲料的3种石斑鱼(褐点石斑鱼、东星斑、斜带石斑鱼)肌肉氨基酸的组成和营养价值进行分析与评价。[结果]褐点石斑鱼、东星斑和斜带石斑鱼肌肉中粗蛋白含量分别为19.24%、19.78%和21.17%。褐点石斑鱼、东星斑、斜带石斑鱼的氨基酸总量、必需氨基酸总量、鲜味氨基酸分别为:76.53%、27.66%、32.44%,76.88%、24.55%、34.77%和77.61%、26.29%、33.48%。3种石斑鱼必需氨基酸的氨基酸评分和化学评分比较接近。3种石斑鱼是营养价值较高的优质鱼类,营养价值基本接近,但其鲜美程度以东星斑最佳。[结论]该研究为石斑鱼必需氨基酸需求研究和配合饲料的研发与优化提供了基础研究材料。

[Objective] The aim was to analyze amino acid content in three species of cultured groupers’ muscle. [ Method] The amino acid contents and nutritional value in the muscle of Epinephelus fuscoguttatus, Plectropomus leopardus, Epinephelus coioides were analyzed and eval-uated, which lived in the cement pool with water aquaculture and was fed with compound feed. [ Result] Crude protein content in the muscle of E. fuscoguttatus, P. leopardus, E. coioides were 19. 24%, 19. 78%, 21. 17%. The contents of total amino acids（TAA）, essential amino acids（EAA） and flavoring amino acids（FAA） in dry weight fish flesh were 76. 53%, 27. 66%, 32. 44%, respectively, in E. fuscoguttatus, 76. 88%, 24. 55%, 34. 77%, respectively, in P. leopardus, 77. 61%, 26. 29%, 33. 48%, respectively, in E. coioides. The amino acids score（ AAS） and the chemical score（ CS） showed no significant difference among the three groupers species. The results indicated that three different species of groupers were nutritive and delicious seafood. Their nutritional values were similar, but the flavor of P. leopardus appeared to be more desirable than E. fuscoguttatus and E. coioides, based on their FAA contents. [ Conclusion] This study can provide basic materials for research of essential amino acids requirement and artificial food development.