Evaluation of growth indices, survival and carcass composition of farmed great sturgeon juveniles (Huso huso) fed prebiotic Immunoster

This research was carried out to assay the effects of different levels of prebiotic Immunoster (IS) on the growth indices، survival and carcass composition in farmed great sturgeon juveniles (Huso huso). After a four-week acclimatization period to rearing conditions and basal diet، 270 farmed great sturgeon juveniles weighing 95. 68 ± 10. 05 g were randomly distributed into 9 fiberglass tanks in three treatments (Control، IS 1% and IS 3%) in three replicates (completely randomized design) and kept at a density of 30 fish per tank for a period of 8 weeks. At the end of the trial، final weight، final length، body weight increase، specific growth rate، average daily growth، protein efficiency ratio، feed conversion ratio، condition factor and crude protein of carcass in fish fed on IS 3% showed significant differences compared with the control (P<0. 05). The results showed that Immunoster at two levels of 1% and 3% has an important role in enhancement of growth performance and feed efficiency in farmed great sturgeon juveniles.