| Popis: |
Present study was conducted to evaluate the combined effect of proteolytic enzyme, papain and vitamin-C on freshwater giant prawn, Macrobrachium rosenbergii. Post-larvae of Macrobrachium rosenbergii of average weight 9.5-16.3 mg initial weight were fed with eight different diets supplemented with papain 0.0%, 0.108%, 0.3%, 0.5%, 0.0%, 0.108%, 0.3%, 0.5% and vitamin-C 0.0%, 0.0%, 0.0%, 0.0%, 0.2%, 0.2%, 0.2% and 0.2% for feeds F1 to F8 respectively. Before the start of the experiment, prawns were reared using papain and vitamin-C free diet in order to deplete their vitamin-C stores. The same diet formulation was used in all treatments containing soybean meal, fish meal, shrimp meal and wheat flour as the major ingredients. Feeding level was kept same for all the groups of prawn and fed to satiation. Protease specific activity after one hour of feeding at the end of the experiment was estimated, which have shown a higher value in comparison to the protease specific activity one hour before feeding at the beginning of the experiment. The results obtained after feeding trial demonstrated improved growth (P |
