Effects of dietary protein level on growth, feed conversion, and protein efficiency ratio of freshwater prawn, Macrobrachium rosenbergii, in outdoor concrete tanks.

摘要

Isocaloric diets with 25, 30, 35, 40, and 45% protein levels were fed to triplicate groups of juvenile (1.96+or-0.2 g) freshwater prawn, Macrobrachium rosenbergii, at 3% to 6% body weight per day for 168 days. No significant effect of dietary protein level on weight gain, specific growth rate, and survival was found (P>0.05). Highest wet weight gain was recorded for prawns fed 35% protein diet and the poorest for prawn fed 25% and 45% protein diet. Protein efficiency ratio (PER) progressively and significantly (P<0.05) decreased with increasing level of dietary protein. The results of the present study suggest that dietary protein requirement of freshwater prawn is 35%.