Research Article: Effects of fermented poultry waste with Saccharomyces cerevisiae on growth performance, survival, carcass composition, and selected immune parameters in juvenile Siberian sturgeon (Acipenser baerii) as a fishmeal replacement

In this study, ۳۰۰ juvenile Siberian sturgeon with an average weight of ۱۰۰.۲۵±۳.۱۷ g were distributed in ۱۲ fiberglass tanks (۳۰۰ liters each) with a density of ۲۵ fish per tank. Over ۵۶ days, they were fed diets containing fermented poultry waste derived from Saccharomyces cerevisiae at ۰% (control), ۲۰% (T۱), ۳۰% (T۲), and ۴۰% (T۳) as a replacement for fishmeal. The growth results showed that the final weight, weight gain, and specific growth rate increased significantly in T۲ treatment compared to other treatments, especially the control group (p<۰.۰۵). The lowest and highest feed conversion ratio was observed in T۲ treatment (۱.۲±۰.۱۱) and the control (۱.۵±۰.۲۳) respectively (p<۰.۰۵). The fish fed with T۲ treatment showed the highest crude protein content (۱۸.۴±۱.۲۶) and the lowest crude fat content (۱.۳۵±۰.۲۹). However, there was no significant difference in the moisture and fat content between the different experimental treatments. The results indicate a significant difference in the levels of immunoglobulin IgM, respiratory activity (production of oxygen radicals), and serum lysozyme activity in the fish fed diet containing ۳۰% treatment compared to other treatments, especially the control (p<۰.۰۵). Overall, the addition of ۳۰% fermented poultry waste from S. cerevisiae instead of fishmeal is recommended to maximize growth performance and improve the immune system.

کلیدواژه ها:

Carcass composition ، Growth performances ، Immune indices ، Saccharomyces cerevisiae ، Siberian sturgeon