Dietary effects of procyanidin and Bio-Aqua® on hematological and immune indices of rainbow trout (Oncorhynchus mykiss)

The role of immunostimulants in reducing diseases and enhancing fish performance has been proven in various studies. In this study, the effects of antioxidant procyanidin and commercial probiotic Bio-Aqua® on some hematological and immune indices of rainbow trout (Oncorhynchus mykiss) were investigated. A total number of ۵۲۵ fingerlings in seven treatments (each treatment in triplicates) with experimental diets, including (۱) commercial food without supplements (CTL), (۲) ۴۰۰ mg procyanidin kg-۱ feed (PC۴۰۰) , (۳) ۸۰۰ mg procyanidin kg feed-۱ (PC۸۰۰), (۴) ۰.۵۰% probiotic diet (PB۰.۵), (۵) ۱.۰۰% probiotic diet (PB۱), (۶) probiotic and procianidin ۰.۵۰% and ۸۰۰ mg kg-۱ feed, respectively (PB۰.۵ + PC۸۰۰) and (۷) probiotic and procianidin ۱.۰۰% and ۴۰۰ mg kg-۱ feed, respectively, (PB۱ + PC۴۰۰) were fed for eight weeks. The results showed that the use of procyanidin alone did not have any significant effect on blood biochemistry and immune indices. However, the individual use of Bio-Aqua® probiotic could affect the hematological and immune indices of fish, except for monocyte, compared to the control and procyanidin treatments. However, the combined use of the supplements improved the hematological and immune indices of fish. It was concluded that the simultaneous dietary administration of procyanidin and probiotic Bio-Aqua® could improve the general health of rainbow trout.

کلیدواژه ها:

Bio-Aqua ® probiotic ، Hematological indices ، Immunity ، Oncorhynchus mykiss ، procianidin