The Effect of replacing fish meal with different level of canola meal cake on growth performance and body composition of oriental river prawn (Macrobrachium nipponense) in juvenile stage

This study was conducted in order to determine the effectiveness of canola meal cake replacement with fish meal on growth indices, body composition and food price of juvenile oriental river prawn. The experiment was performed based on completely randomized designs in 5 treatments with 3 replications of different substitution levels 0 (control diet), 25%, 50%, 75%, and 100 %. Four hundred and fifty prawns with average weight of 1.00 ± 0.12 g after two weeks of adaptation were feed with experimental meal for eight weeks. Growth indexes including average weight gain (WG) specific growth rate (SGR), food conversion ratio (FCR), protein efficiency ratio (PER), survival rate (SR) and body composition including moisture, protein, fat and ash were evaluated. The results of this experiment shows that the substitution of canola meal cake up to 50% with fish meal has positive effect on growth performances (p>0.05). However with further increasing canola meal cake in Treatments 75 and 100% the growth performances had shown unimproved and there were statistically significant with other treatments (p0.05) were observed in body composition (protein, fat and ash); Only moisture of the body in Treatments 75 and 100% showed a significant increase (p