The effect of different forms of magnesium oxide in anesthesia of common carp fingerlings by ketamine

By increasing demand of aquaculture industry to good and safe anesthetics drugs for fish farming and hatchery practices, investigation for finding new anesthetic drug is necessary. Ketamine is one of anesthetics drugs which have many applications in veterinary medicine. The purpose of this study was to investigate the effect of magnesium oxide nanoparticle and magnesium oxide on anesthesia with ketamine in common carp. For this purpose, 120 common carp fingerling (in 8 groups) were exposed to different concentrations of magnesium oxide nanoparticles (12.5, 25 and 50 ppm) in basic concentration of ketamine (100 ppm), Time of anesthesia and recovery from anesthesia were recorded. Results showed that, there were significant differences between the groups in duration of anesthesia induction and recovery. The use of ketamine anesthesia with nano-magnesium oxide reduced the time of anesthesia in comparison with ketamin anesthesia alone. According to results, by increasing the concentration of magnesium oxide, duration of anesthesia decreased accordingly. The combination of low concentrations of nano-magnesium oxide with ketamine reduced recovery of anesthesia in comparison with the control, but in higher concentration of magnesium oxide, recovery time increased proportionally. In conclusion, the best effective concentration for a safe anesthesia in common carp determined as 25 ppm magnesium oxide with 100 ppm ketamine.