ABSTRACTNeither feeding rate nor feeding frequency appear to affect protein digestibility in the freshwater shrimp,Macrobrachium rosenbergii. A feeding frequency of twice daily resulted in a significant increase in food consumption compared to feeding once or 3 times daily. Apparent protein digestibility from a diet containing menhaden meal as the primary protein source ranged from 83.3% to 87.7% based on the chromic oxide method. Those values were within the ranges published on other crustacean species for fish meal and other proteins.