Abstract

Anesthetics have been important in ornamental fishes for transport and restriction of behaviors as well as for surgical applications and studies in science. Also, more economical and appropriate anesthetics can be common choice for these stiuations. In the study, a total of two hundred and fifty two zebrafish (forty two females and forty two males in each group) divided in three groups were studied as group A (Anise oil); group T (Thyme oil); group M (Mint oil). Anesthesia intake and lethal dose values were determined by following the anesthetic entry and recovery times. There was no anesthetic effect in group A, while anesthetic effects occured in groups T and M in concentrations 1, 5, 10, 20 and 30 mg/l. Similarity was found in groups T and M in terms of anesthesia entry and recovery times (P>0.05). Nevertheless, no mortality occured in group M. However, 5mg/l tyme oil anesthesia was determined to cause 50% mortality in male fishes (group T). It was also observed that mint oil has an anesthetic effect on zebrafish with increa-sing doses determined by anesthesia entry and recorvery times (group M, P

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