Research Article: Effect of time‐dependent protein restriction on growth performance, immunity response, and body composition in the stellate sturgeon (Acipenser stellatus)

One hundred and fifty stellate sturgeon (Acipenser stellatus, ۲۵۰ ± ۳.۲۴ g) were assembled into ۱۵ round concrete tanks. The tanks were allocated to five treatments with three replications: fed with a diet containing ۳۰% protein for eight weeks (T۱); fed with a diet containing ۳۰% protein level in weeks ۱, ۳, ۵, and ۷ and fed with a diet containing ۳۵% protein level in weeks ۲, ۴, ۶, and ۸ (T۲); fed with a diet containing ۳۰% protein in weeks ۱, ۲, ۵, and ۶, and fed with a diet containing ۳۵% protein in weeks ۳, ۴, ۷, and ۸ (T۳); fed with a diet containing ۳۰% in the diet in weeks ۱, ۲, ۳, and ۴, and fed with a diet containing of ۳۵% protein in weeks ۵, ۶, ۷, and ۸ (T۴); and fed with a diet containing ۳۵% for eight weeks (T۵). Remarkable effects were recorded in growth efficiency, and T۲ and T۵ had higher growth than other treatments. No marked difference was seen in the whole body composition. Different feeding strategies affected RBC, WBC, and MCV, and RBC and WBC of fish in the T۴ were notably upper than in the other groups. Different feeding strategies had marked differences in lysozyme and ACH۵۰ activity. These results demonstrated that T۲ could use as a feeding strategy for stellate sturgeon.

کلیدواژه ها:

Stellate sturgeon ، Feeding strategy ، Protein restriction time