Growth performances and hemato-immunological responses of common carp (Cyprinus carpio Linnaeus, 1758) to fermented Aspergillus oryzae

The present study investigates the effects of varying levels of dietary fermented Aspergillus oryzae (0 g Kg1 as control group, 10, 20 and 30 g Kg1) on performance and haematoimmunological indices of common carp (Cyprinus carpio) fingerlings. Common carp fingerlings (n=240, w=4.56 ±0.17 g) were supplied, randomly stocked in 12 aquaria and fed with experimental diets for 7 weeks. The results revealed no significant differences between performance parameters of fermented A. oryzae fed test and control diets (p˃0.05). Also, evaluation of haematological parameters (RBC, Hct, Hb) and white blood cell (WBC) counts showed no notable changes between experimental groups (p˃0.05). However, respiratory burst activity was meaningfully higher in fish fed fermented A. oryzae compared to control group (p 0.05). The present results showed that possible effects of administration of fermented A. oryzae on immune responses in carp fingerlings.