The study was carried out to determine the anaesthetic effects of urethane (C3H7NO2) on C. carpio. No differences were observed on fish behaviour and physical and chemical characteristics of water at 1, 2, 3 and 4 mg/l concentration of urethane. Differences were observed either in fish behaviour or water characteristics at higher concentrations. Results in this study showed that the anaesthetic effects of urethane for C. carpio were evident at high concentrations (100-150 mg/l) in 30 minutes. Urethane was effective to the fish at 100-125 mg/l concentration in 18 minutes and then lost its effects.
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Mustafa Dorucu, Erdal Duman and Bulent Orsay, 2001. Study on Effects of Urethane (Ethylcarbamate, C3H7NO2) on Cyprinus carpio. Pakistan Journal of Biological Sciences, 4: 1382-1383.