摘要
对大通湖河蚬软体部分营养成分进行分析与评价,为其资源开发利用提供基础信息。结果显示,大通湖河蚬含肉率为(13.01±0.001)%,软体部分含水量为(90.58±0.01)%,干物质中粗蛋白、粗脂肪和粗灰分含量分别为(65.92±0.27)%、(15.86±0.02)%和(4.15±0.03)%。所检测的17种氨基酸中,必需氨基酸7种,占总氨基酸含量的34.82%;半必需氨基酸2种,占4.19%;4种呈味氨基酸占39.87%,鲜味氨基酸谷氨酸和天冬氨酸是含量最高的2种氨基酸。苏氨酸的氨基酸评分和化学评分均最高,分别为120和103分,而半胱氨酸+蛋氨酸均最低,分别为88和50分。大通湖河蚬软体部分呈现高蛋白低脂肪特征,富含鲜味氨基酸,半胱氨酸+蛋氨酸为第一限制性氨基酸。
Datong Lake is the largest lake for aquaculture in Hunan province, which is rich in natural resource of Corbicula fluminea. The present study analyzed and evaluated the nutritional components in the soft part of C. flu- minea in Datong Lake, the results of which will provide useful information in the proper development and utilization of C. fluminea resource. It was showed that the ratio of flesh content was （13.01 ±0. 001 ） %, and the water con- tent of the soft part was （90.58 ±0.01 ） %. The contents of crude protein, crude fat and ash were （65.92 ± 0.27 ） %, （ 15.86 ±0.02 ） % and （4.15 ± 0.03 ） % of dry matter, respectively. There were 17 common amino acids analyzed in the soft part of C. fluminea, consisting of 7 essential amino acids, 2 semi-essential amino acids and 4 flavor amino acids. The ratio of 7 essential amino acids to total amino acids was 34.82%, while that of 2 semi-essential amino acids and 4 flavor amino acids were 4.19 % and 39.87 %, respectively. The contents of both Glu and Asp were the two highest among 17 amino acids. According to the AAS and CS evaluation, the highest val- ues of both amino acids score and chemical score were observed in Thr （ 120 and 103 ）, while the lowest values of those were observed in Cys ＋ Met （88 and 50）. The results suggested that the soft part of C. fluminea in Datong Lake was wealth of crude protein and flavor amino acids, but was relatively low in crude fat. The first limiting ami- no acid was Cys ＋ Met.
出处
《水生态学杂志》
北大核心
2013年第5期87-90,共4页
Journal of Hydroecology
基金
国家自然科学基金项目(31100282
31000183)
国家公益性行业(农业)科研专项(201303056-7)
国家大宗淡水鱼类产业技术体系常德综合试验站项目(CARS-46-42)
关键词
大通湖
河蚬
营养成分
氨基酸
Datong Lake
Corbicula fluminea
nutritional component
amino acid
