SUBSTITUTION OF FISHMEAL PROTEIN BY SOYBEAN MEAL IN DIET FOR GIANT FRESH WATER PRAWN MACROBRACHIUM ROSENBERGII (de Man)

A 95 days experiment was conducted to observe the growth performance of giant fresh water prawn (Macrobrachium rosenbergii) replacing fishmeal protein by dietary soybean meal in ten earthen mini ponds (50 m2), at Khulna University campus . Five experimental diets containing 25% as Control, Diet 1, 2, 3 and 4 were used. In 36% used a sole source prepared substituting with 30, 40, 50, 80% respectively. Juvenile shrimps collected from local vendors having 1.7 g average weight stocked density m-2. Water soil quality monitored regularly found within acceptable range. The prawns fed twice daily satiations serving feeding trays. highest gain (23.89 ± 5.29 g) lowest 2 (17.68 1.09), although no significant difference (p>0.05) observed among treatment FCR (1.09) SGR (2.60) PER (3.43) achieved that showed (p<0.05) Control. Survival rate D1, D2, D3 D4 71%, 83%, 95%, 95% 86% Among all treatments better 4.