Growth performance, hepatic function parameters, histological changes of rainbow trout Oncorhynchus mykiss (Walbaum, 1792) and oxidative stability index of feed following dietary administration of Mix-Oil

摘要: The main objective of this study was to evaluate the effects dietary supplementation Mix Oil (including: Thymus vulgaris (%0.5), Oreganum vulgare (2%) and Eucalyptus spp (2.5%) essential oils) on growth performance, hepatic function parameters, tissue changes rainbow trout andoxidative stability index feed. Four groups fish (with average weight 31.0±0.1 g) were fed with four diets containing: 0, 50, 200 400 ppm Mix-Oil for 8 weeks. SGR, ADG, CF, TGC, DGC, RGR BWI significantly higher also FCR lower observed in compared 50 control (p 0.05). An increase number hematopoietic cells kidney significant length intestinal villous related epithelium having been seen treatment group other studied <0.05). By increasing concentration Mix-Oil, feed resistance has increased against oxidation. Although, increments only statistically <0.05) groups. results suggested that administration at level could improve performance as well stability.