6个地区青海湖裸鲤肌肉营养成分分析

采用常规生化分析方法,测定青海湖6个不同地区的青海湖裸鲤(Gymnocypris przew alskii)肌肉主要营养成分,对其营养价值进行评价。结果表明,淡水青海湖裸鲤肌肉中脂肪含量显著大于(P<0.05)其他5个地区,蛋白含量显著大于(P<0.05)黑马河青海湖裸鲤肌肉的蛋白含量,6个地区青海湖裸鲤肌肉营养成分存在一定的地区差异。总体上,青海湖裸鲤肌肉(鲜样)中粗蛋白含量为17.26%~18.87%;粗脂肪含量为1.51%~3.37%;灰分含量为1.42%~1.61%;18种氨基酸总量15.48%~17.16%,其中除色氨酸外7种人体必需氨基酸总量6.38%~7.05%,4种鲜味氨基酸总量5.82%~6.49%。青海湖裸鲤肌肉中蛋白质含量较高,氨基酸种类齐全,必需氨基酸与鲜味氨基酸含量较高,尤其是淡水青海湖裸鲤品质更佳,淡水的生态环境可能更适合青海湖裸鲤的生长。

Analysis of Muscle Nutritional Components of Gymnocypris przewalskii in Six Regions

The muscle nutritional composition of Gymnocypris przewalskii was measured by conventional biochemistry methods.The result indicated that the content of fat in the muscle of G.przewalskii was significant(P<0.05)higher in Dan-shui area than in the other five ones;the protein content was also much higher in Dan-shui area than in Hei-ma area(P<0.05).So it was concluded that there were some differences in nutritional components of G.przewalskii in different regions.As a whole,the contents of protein,fat and ash were 17.26%-18.87%,1.51%-3.37% and 1.42%-1.61% respectively.And the content of total amino acids was from 15.48% to 17.16%.The ratios of essential amino acids were 6.38%-7.05%,and delicious amino acids were 5.82%-6.49%.The contents of protein,essential amino acids and delicious amino acids were obviously high in G.przewalskii muscle.The quality of G.przewalskii in Dan-shui was the best among the five areas,which may be attributed to its growth environment.