Changes in growth, blood immune parameters and expression of immune related genes in rainbow trout (Oncorhynchus mykiss) in response to diet supplemented with Ducrosia anethifolia essential oil.

An 8- week feeding trial was conducted to investigate the effects of Ducrosia anethifolia essential oil on growth, blood immune parameters and immune related genes expression in juvenile rainbow trout (Oncorhynchus mykiss). Fish were allocated into 4 groups and fed on diet containing different levels of essential oil (0, 0.001, 0.