| Summary: | This study was conducted to evaluate the effect of replacing dietary fish rations with canola rations on the growth rate, survival rate and body composition of the Siberian sturgeon (Acipenser baerii Brandt). Five isonitrogenous (45% crude protein) and isocaloric (18.53 MJg^-1) diets were formulated by replacing 0 (control), 10 (C_10), 20 (C_20), 30 (C_30) and 40% (C_40) of fish rations with canola rations. Juvenile fish with an initial weight of 22.80 ± 0.34 g (mean ± SD) with five treatments and three replications were fed for 10 weeks. At the end of the experiment, the growth rate, survival rate and body composition of the fish were measured. The results of this study showed that there was significant differences in the growth indices and body composition of the fish that were fed the different diets (P<0.05). The lowest growth rate was observed in C_40, with significant differences in the growth rate between C40 and the other treatments (P<0.05). There were no significant differences in the growth rate between C_30 and C_40 (P>0.05). The survival rate was 100% in all treatments. There were no significant differences in body protein, lipid and ash contents in the different treatments (P>0.05), but significant differences were observed in the moisture content of the body of the fish that were fed different diets (P<0.05). The results of the present study suggest that 30% of fish rations can be replaced by canola rations without any negative effects on the growth rate, survival rate and body composition of the Siberian sturgeon.
|
|---|