Analysis of the Ratio of Flesh Content and Nutrient and Evaluation of Nutritional Value For Rhinogobio ventralis

A analysis of the ratio of flesh content and the contents of the main nutrients(such as protein,fat,ash content,moisture) were analyzed,mineral elements,amino acids composition in its muscle were done for Rhinogobio ventralis.Moreover,its nutritional value was evaluated and compared with other fishes.The ratio of flesh content of R.ventralis was(69.51±4.91)%.And the proportion of moisture,crude protein,crude fat and ash content is(70.14±0.72)%,(17.26±0.47)%,(11.28±0.64)% and(0.87±0.03)%.In wet matter,the total content of 17 amino acids was found(16.15±0.26)%,including(6.31±0.11)% essential amino acids,39.10% in total amino acids,and(6.27±0.11)%.4 delicious amino acids account for 38.83% in total amino acids.Essential amino acids to no-essential amino acids were 64.20%.The constitutional rate of the essential amino acids accorded with the FAO/WHO standard basically.The essential amino acids index was 82.17.According to the amino acids score(AAS),the first limited amino acid was isoleucine and the second limited amino acids was valine;on the basis of chemical score(CS),the first limited amino acids was methionine+cystine and the second limited amino acids was isoleucine.10 mineral elements were determined in the muscle.The range of average contents of macroelements including Ca,P,Na and Mg was 296.32-3278.14 μg/g and that of microelements including Cu,Zn,Fe,Mn,Cr and Se was 0.06-112.5 μg/g.Ca∶P averaged 1∶2.1.