Efficacy of two different doses of 10% eugenol in adult California yellowtail (Seriola dorsalis).

Average times to a handleable plane of anaesthesia, total time in the anaesthetic bath, and recovery times for treatment and control groups are presented in Table. Both trial doses of 15 and 25 mg/L of eugenol and the control dose of 75 mg/L MS-222 were successful at safely inducing fish to a handleable or light plane of anaesthesia where routine diagnostic procedures and data collection could be performed. This was likely due to the differences in total anaesthetic bath time (based on opercular rate), with those in the higher eugenol treatment dose and control groups having truncated total anaesthetic times when compared with the lower treatment dose. Use of the lower eugenol dose will provide practitioners with a longer period of stable opercular rate during anaesthesia, which will allow for more time to safely handle fish and perform multiple procedures. [Extracted from the article]