Fermentation of Formulated Feed using Bacillus subtilis TS2b for Giant Freshwater Prawn (Macrobrachium rosenbergii) Feed

Abstract Giant prawn, Macrobrachium rosenbergii is a freshwater fishery product that requires further development. However, the high cost of commercial feed one challenges in growing giant prawns. One approach to addressing this issue use local feedstuff as an alternative ingredient. The main obstacle using limitation (anti-nutrition, crude fiber, etc.) fermentation technology can overcome. goal study was create efficient for prawns by fermenting formulated (which contains feedstuff) B. subtilis TS2b. Three treatments with three repetitions were used following treatments: Treatment A consisted (as positive control), B (negative and C fermented Bacillus 0.47±0.02g weight randomly stocked into 9 aquarium units (60 × 50 45 cm) stocking density 20 individuals/aquarium. fed times day 51 days rearing period. Absolute relative growth, specific growth rate, survival conversion, protein, fat retention all measured. results showed absolute : 1,41±0,22g (A), 1,37±1,37g (B), 1,51±0,04g (C), conversion 1,82% 1,83%(B), 1,66%(C) rate were: 72±2,5%(A), 88±4,7%(B) 87±2,4%(C).