Scott T. Porcher Justin R. Smerud Jeffery R. Meinertz 2014 Studies were conducted to determine the anaesthetic/sedative concentrations and durations that would maximize anaesthetic/sedative residue concentrations in rainbow trout (<i>Oncorhynchus mykiss</i>) skin-on fillet tissue. Rainbow trout (167–404 g) were exposed to 50 mg l⁻¹ AQUI-S® 20E (10% active ingredient, eugenol) in 17°C freshwater for durations up to 1440 min, 100 and 250 mg l⁻¹ AQUI-S® 20E for durations up to 240 min, and 500 and 1000 mg l⁻¹ AQUI-S® 20E for durations up to 90 min. Fish exposed to 100 mg l⁻¹ AQUI-S® 20E for durations of 30, 60, 120 and 240 min had the greatest eugenol concentrations in the fillet tissue, 50, 58, 54 and 62 µg g⁻¹, respectively. All other exposure concentrations and durations resulted in significantly lower eugenol concentrations, i.e. all < 39 µg g⁻¹. application/pdf 10.1080/19440049.2014.939720 en Taylor and Francis Determination of the exposure parameters that maximise the concentrations of the anaesthetic/sedative eugenol in rainbow trout (<i>Oncorhynchus mykiss</i>) skin-on fillet tissue article