M. HEIDARIEH - Agricultural, Medical and Industrial Research School (AMIRS-NSTRI), Karaj, Iran
M. SOLTANI - Aquatic Animal Health Departments, Faculty of Veterinary Medicine, University of Tehran, Iran
A. H. TAMIMI - University of Applied Science and Technology, Tehran, Iran
M. H. TOLUEI - Aquaculture section, Iran Fisheries, Bandare-Anzali, Gilan province, Iran

The present study examined the effects of Vitacel raw fiber on great sturgeon (Huso huso) immunocompetent cell population size including lymphocyte and neutrophil populations and lysozyme activity after oral administration of the feed and Vitacel at ۱.۳% of the feed for ۹۰ days. Generally, a significant increase was seen in the neutrophil count of fish receiving Vitacel as compared to the control group ۹۰ days post treatment (P<۰.۰۵). Also, lysozyme activity in fish that received Vitacel was significantly higher than the control group ۹۰ days post treatment (P<۰.۰۵). The results suggest that Vitacel may effectively promote immune responses in great sturgeon (Huso huso).

Huso huso, Lysozyme, Raw fiber, Vitacel