. The Canadian field-naturalist. Natural history; Sciences naturelles. ^ ^.. —/^ Figure L A GPS collared adult cow Elk (ear-tag 360) exhibiting hind limb paralysis 2 minutes after being darted with a mixture of Telazol® and Xylazine. (Photo by R. Rosatte). the right upper hind leg musculature. Respiration rate was stable at about 12/min during processing (de- antlered and ear-tagged - #141) and the gums and tongue remained pink colored with no evidence of hypoxemia or bloat. A 3 cc intramuscular injection of Dystosel (Vitamin E - 136 lU/mL and selenium - 3 mg/mL) (Pfizer Canada Inc, London. On
. The Canadian field-naturalist. Natural history; Sciences naturelles. ^ ^.. —/^ Figure L A GPS collared adult cow Elk (ear-tag 360) exhibiting hind limb paralysis 2 minutes after being darted with a mixture of Telazol® and Xylazine. (Photo by R. Rosatte). the right upper hind leg musculature. Respiration rate was stable at about 12/min during processing (de- antlered and ear-tagged - #141) and the gums and tongue remained pink colored with no evidence of hypoxemia or bloat. A 3 cc intramuscular injection of Dystosel (Vitamin E - 136 lU/mL and selenium - 3 mg/mL) (Pfizer Canada Inc, London. Ontario) was administered as a preventative measure against cap- ture myopathy. When processing was complete, Yobine was injected intramuscularly to speed recovery from the effects of xylazine. Induction, immobilization and recovery times are shown in Table 1. Discussion A dosage of mg/kg (body weight) of Tela- zol® and mg/kg of xylazine proved to be an effective drug combination for the rapid immobiliza- tion of four free-ranging Elk in Ontario. Induction time or the time from darting until the animal was prone for those dosages was 3-4 minutes. This calcu- lation did not include the Elk for which induction time was noted as 10 minutes, as that animal was not immediately located in the forest. Similaily, Mills- paugh et al. (1995) reported a mean induction time of minutes when Elk were immobilized with mg/kg Telazol® and mg/kg xylazine. The advantage of using a Telazol®/xylazine mixture over a drug combi- nation such as ketamine hydrochloride (at a commer- cially available concentration 100 mg/mL)/xylazine is that a much lower volume of Telazol is required to at- tam a state of immobiUzation. For example, only a 4 mL (800 mg of Telazol® reconstituted in mL of xyla- zine) volume of drug was required to immobilize a 225 kg cow Elk. About 15 mL of a ketamine hydrochlo- ride/xylazine hydrochloride (100 mg/mL ketamine) mixture was required to im
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