Effects of anaesthesia with MS-222, clove oil and CO2 on feed intake and plasma cortisol in steelhead trout (Oncorhynchus mykiss) |
| |
| Authors: | Juhani Pirhonen Carl B Schreck |
| |
| Institution: | Oregon Cooperative Fish and Wildlife Research Unit, U.S. Geological Survey and Department of Fisheries and Wildlife, Oregon State University, 104 Nash Hall, Corvallis, OR 97331, USA |
| |
| Abstract: | We examined the effects tricaine methanesulfonate (MS-222), clove oil and CO2 on feed intake and cortisol response in steelhead trout, Oncorhynchus mykiss. Even though a body of literature exists about the effects of different anaesthetics on fish, no comparative information seems to be available about their effects on feed intake after anaesthesia, which would be important to know especially in aquaculture research. We anaesthetised juvenile steelhead trout with these three anaesthetics, and then sampled them 4, 24 and 48 h later. Fish in all groups ate relatively well already 4 h after anaesthesia. However, feed intake in fish treated with clove oil or MS-222 was lower than in the controls. There were no differences in feed intake among anaesthetised groups. Plasma cortisol concentrations were elevated 48 h after anaesthetisation, but the treatment means were equal throughout the experiment. Our results support previous findings that clove oil is a reasonable alternative to MS-222. |
| |
| Keywords: | Anaesthesia Feed intake Clove oil CO2 Cortisol MS-222 |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
