Effects of phyzime enzyme in diet on growth performance, survival, digestibility, carcass composition and final production of farmed Siberian sturgeon, Acipenser baerii Brandt, 1869

Abstract

An investigation was carried out to find the effects of different Smizyme phytase levels on growth indices, body composition and nutrient digestibility of farmed Siberian sturgeon, Acipenser baerii. One hundred and eighty fish (average weight 1.19 ± 0.017 kg) were distributed in nine concrete tanks (20 fish in each tank; area = 4 m2; depth = 80 cm) and divided to 3 treatments (F0, F1000 and F2000). Fish were fed for 62 days. Results showed that physaem addition in 2000 IU (F2000) to sturgeon commercial diet (38% protein and 12.5% crude fat) leads to significant increase in final weight, daily growth rate, specific growth rate and the decreased feed conversion ratio compared to the other two groups (p0.05). Body protein was declined in F1000 and F2000, while body lipid was elevated in F2000 (p0.05). Based on the results obtained from growth indices and digestibility coefficient, we suggest adding 2000 IU/kg Smizyme phytase in the fish diet.

Keywords

• physym enzyme
• growth
• digestibility
• body composition
• siberian sturgeon