Growth performance, immune response, antioxidant capacity and disease resistance against Yersinia ruckeri in rainbow trout (Oncorhynchus mykiss) as influenced through singular or combined consumption of resveratrol and two‐strain probiotics

In the current study, the possible synergistic properties of resveratrol (Res) and two‐strain probiotics (Pro; Lactobacillus acidophilus and Bifidobacterium bifidum) on growth performance, innate immune responses, antioxidant defence and disease resistance against Yersinia ruckeri were assayed in rainbow trout. Accordingly, fish (10.42 ± 0.26 g) were fed with a basal diet as control and diets supplemented with R1 (400 mg/kg Res), R2 (800 mg/kg Res), P1 (0.5 g/kg Pro), P2 (1 g/kg Pro), R1P1 (400 mg/kg Res + 0.5 g/kg Pro) and R2P2 (800 mg/kg Res + 1g/kg Pro) for 8 weeks. The final weight, weight gain and feed conversion rate significantly improved in fish fed the P1, P2, R1P1 and R2P2 (p