The use of essential oils of thyme (Origanum onites) and coriander (Coriandrum sativum) as anesthetics in rainbow trouts (Oncorhynchus mykiss)

In this study, anesthetic effects of thyme (Origanum onites) and coriander (Coriandrum sativum) essential oils were determined on rainbow trout (Oncorhynchus mykiss). Rainbow trout with an average weight of 10 g were used in the experiment. In order to determine the anesthetic effect of essential oils were prepared in different concentrations (20, 50, 70, 100, 150, 200, 300, 400, 500, 600 mg/L-1). Anaesthasia induction and recovery time of anesthesia were evaluated separately for each fish. At the end of the experiment, 50 and 70 mg/L-1 thyme essential oil entered deep anesthesia in trout, but fish could not come out of anesthesia in 10 minutes at both concentrations. Coriander essential oil provided deep anesthesia at 200 mg/L-1 and deep sedation at 50 mg/L-1 in fish. Coriander essential oil showed no mortality in trout. At the end of the experiment, it was determined that the use of 200 mg/L-1 coriander essential oil as an anesthetic would be appropriate in rainbow trout.