The effect of partial replacement of fish meal by corn gluten meal in diet on the growth and muscle composition of Macrobrachium nipponensis

Abstract:

The effects of corn gluten meal (CGM) as a partial replacement of fish meal in diet on the growth and muscle composition of Macrobrachium nipponensis were studied. The experiment diets contained a gradient of CGM such as 0% (the control), 3%, 6%, 9%, 12% and 12%+0.1%MHAGa respectively. All diets were fed to the shrimp triplicately. In the first phase of the experiment, diets were fed to juvenile shrimp (initial body weight of 0.12±0.04 g) for 30 days, and in the second phase diets were fed to juvenile shrimp(initial body weight of 0.23±0.12 g) for 23 days. Growth, survival rate and the muscle composition of M.nipponensis were determined. The results indicated that there was no significantly difference in relative growth rate and survival rate among the treatments（P>0.05）although there was a tendency of declining relative growth rate with the increment of the partial replacement. The nutrition assays of the shrimp muscle indicated that there were no significant effects of the partial replacement on water content, total lipid, crude ash, total amino acid（TAA）and total essential amino acid（TEAA）of the shrimp muscle（P>0.05）. The polyunsaturated fatty acid and DHA+EPA proportion in total fatty acid profiles of the muscle obviously decreased as the amount of CGM in diet was more than 9.0%.