Twelve captive wild-caught adult arctic foxes (Alopex lagopus) were anesthetized a total of 24 times for an equal number of surgical procedures involving implantation of heart rate (HR) and core body temperature transmitters (Tb) between October 1995 and April 1997. Xylazine–ketamine and medetomidine–ketamine anesthesia was used, resulting in an unacceptably high death rate. One out of four foxes anesthetized with xylazine–ketamine died, whereas two of nine foxes anesthetized with medetomidine–ketamine died out of a total of 20 surgical procedures. Durations of the surgeries for implantation of Tb transmitters and HR transmitters were 73 ± 7 min and 95 ± 13 min, respectively.
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