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2013年10月于四川省自贡市长江支流沱江富顺段采集鲤鱼(Cyprinus carpio)、鲫鱼(Carassius auratus)、大眼鳜(Siniperca kneri)等3种鱼共60尾,分别测定鱼体化学组成,估算能量密度。结果表明:3种鱼的脂肪含量平均值分别为3.24%、4.13%和2.78%,蛋白质含量平均值分别为16.96%,16.28%,17.27%,水分含量平均值分别为75.42%,74.05%,74.06%,能量密度的平均值分别为5.28,5.47,5.18kJ·g-1;3种鱼水分含量(CWAT鲤,CWAT鲫,CWAT鳜)与各自的能量密度(E鲤,E鲫,E鳜)的回归方程分别为:E鲤=-0.368 9CWAT鲤+33.081,(r2=0.799 6,n=30,p<0.01);E鲫=-0.308 4CWAT鲫+28.304,(r2=0.823 5,n=13,p<0.01);E鳜=-0.385 5CWAT鳜+33.729,(r2=0.882 5,n=17,p<0.01)。统计分析表明鲫鱼的体长与蛋白质含量、脂肪含量和能量密度呈显著的正线性关系(p<0.05),而鲤鱼和大眼鳜的体长与它们均无线性关系。3种鱼的水分含量分别与蛋白质含量、脂肪含量和能量密度均呈显著的负线性关系(p<0.01)。研究结果表明,采用3种鱼的水分含量估算各自蛋白质含量、脂肪含量和能量密度是可行的。
In October 2013, 60 fish (Cyprinus carpio), Carassius auratus (Carassius auratus) and Siniperca kneri were collected from the Fushun section of Tuojiang River, a tributary of the Yangtze River in Zigong City, Sichuan Province. The chemical composition, density. The results showed that the average fat content of the three kinds of fish were 3.24%, 4.13% and 2.78% respectively, and the average protein contents were 16.96%, 16.28% and 17.27% respectively. The average moisture contents were 75.42%, 74.05% and 74.06% , Respectively. The average energy density was 5.28, 5.47 and 5.18 kJ · g-1, respectively. The regression equations of water content (CWAT, CWAT, CWAT) and their respective energy densities (R2 = 0.799 6, n = 30, p <0.01); E crucian carp = -0.308 4CWAT crucian carp +28.304, (r2 = 0.823 5, n = 13, p <0.01); E 鳜 = -0.385 5CWAT 鳜 +33.729, (r2 = 0.882 5, n = 17, p <0.01). Statistical analysis showed that there was a significant positive linear relationship between body length and protein content, fat content and energy density (p <0.05), while body length of carp and big-eyed owl had no linear relationship with them. The moisture content of the three kinds of fish showed significant negative linear relationship with protein content, fat content and energy density (p <0.01). The results show that it is feasible to estimate the protein content, fat content and energy density of the three species of fish using their moisture content.