Efficacy of Clove Oil, 2-Phenoxyethanol and Benzocaine on European Catfish, Silurus glanis Linnaeus 1758

The efficacy of clove oil, 2-phenoxyethanol and benzocaine was tested on captive-bred European catfish (wels), Silurus glanis L., 1758 in this study. According to effectiveness criteria, the most optimal implementation results were obtained from 100 mu l L-1 (induction 69.00 +/- 6.48 s and recovery 253.86 +/- 14.78 s) clove oil, 1000 mu l L-1 (induction 88.71 +/- 8.50 s and recovery 201.43 +/- 12.19 s) PE, and 100 mu l L-1 (induction 103.00 +/- 6.90 s and recovery 215.71 +/- 19.99 s) benzocaine. The concentration of anesthetics agent used directly affected the onset of each physiological respond (p<0.05). The relationship between doses and induction times was inverse exponential, in spite of that an exponential relationship was confirmed between doses and recovery times for all anesthetics. In conclusion, all these three anesthetics can be effectively used for wels.