Biochemical Composition And Energy Content Of Coilia Brachynathus In Poyang Lake

Coilia brachygnathus is landlocked Lake-based small and medium commercial fish, the experimental samples were mainly taken from the Poyang Lake, with the set net capture. Coilia brachygnathus of Poyang Lake, in the biological characteristics of species identification and more information on research, and for their biochemical composition and energy content of the analysis area have not been reported. Based on the short-jaw anchovy anniversary, seasonal changes, different body weight and body length of different biochemical composition (including moisture, ash, fat, protein, fatty acids, amino acids, minerals and energy content) were measured, Biochemical analysis of the composition and energy content of its changes and possible factors causing change occurs.The main findings and conclusions are as follows:(1)By analyzing the Coilia brachygnathus of the different months, different seasons, different stages of body weight and body length of water, ash, crude fat and crude protein content, ash content of Coilia brachygnathus were not significantly different (P> 0.05) in different life stages, In different body weight and body length changes, water content of different weight periods and length periods have a linear relationship, crude fat and crude protein content showed an upward trend, Crude fat content ranged significantly in all seasons (P<0.05).(2)Biochemical composition of fish catches by Coilia brachygnathus anniversary, different seasons and different body weight and body length of the correlation analysis and regression analysis, moisture content and crude fat content, moisture content and crude protein content, ash content and crude protein content and crude fat and crude protein content showed a significant correlation between(P<0.05).(3)Anniversary on Coilia brachygnathus, different seasons, different stages of body weight and body length of the fatty acid content analysis, Complete fatty acid composition, content rich. Fatty acids are oleic acid measured (C18:1) the largest share, followed by palmitic acid (C16:0), EPA (C20:5) and DHA (C22:6).(4)By analyzing Coilia brachygnathus in the anniversary of the different seasons, different stages of body weight and body length of amino acid changes, In addition to tryptophan is destroyed in the hydrolysis process, but from Coilia brachygnalhus, a total of 17 amino acids measured, including EAA is 7, DAA is 4, a relatively complete variety of amino acids.(5)By analyzing Coilia brachygnalhus of different seasons, different stages of body weight and body length changes of the mineral elements were detected on the 4 major elements and 7 kinds of trace elements, which are the highest K content.(6)By analyzing Coilia brachygnathus anniversary of the different seasons, different stages of body weight and body length of the energy content. In the annual change, annual change in the whole energy content did not show significant difference (P> 0.05), and no definite trends. Changes in different seasons, spring, summer, and autumn, the energy content increased gradually, reached the maximum in the autumn, while in the breeding season dropped to the lowest value of the maximum late in the breeding. In different stages of body weight and body length, with Coilia brachygnathus body weight and body length increased, the energy content showed the gradual upward trend.(7)By comparing the analysis of Coilia brachygnathus, C. ectenes taihuensis, C. ectenes and C. mystus the biochemical composition and energy content of different, Crude fat content and energy content is higher than the lake anchovy and less than Coilia, but they are nothing but ash content higher than the lake anchovy, anchovy C.