Effect of Ultra A-max on sexual maturation processes, hematological and biochemical factors of blood serum in growing Beluga (Huso huso) in Gorgan Bay

The aim of this study was to investigate the effect of Ultra-Amax commercial prebiotics on the hematologic, biochemical and serum steroid hormones levels of Huso huso blood at the Ashoradeh catchment processing center. The experiment was conducted using a completely randomized design in the control group (without any additive) and two experimental treatments including 1g / kg of prebiotics in per kg of diet were supplemented. Each treatment was carried out with 3 replicates and 10 fish per cage per 120 day breeding period with an average weight of 4.55 ± 0.37 kg.The results showed a significant improvement in serum levels of steroid hormones in fish fillets in experimental treatments compared to control group (p