Telazol(R) (tiletamine hydrochloride and zolazepam hydrochloride combi
nation) and a combination of ketamine hydrochloride and acepromazine w
ere used to immobilize wild Ethiopian wolves (Canis simensis) in Ethio
pia from 1988 to 1992. Telazol(R) doses of 2.1 to 6.5 mg/kg resulted i
n a mean (+/-SD) induction time of 2.3 +/- 0.9 min and a mean (+/-SD)
immobilization time of 82.2 +/- 28.6 min. Induction time did not diffe
r by dose, wolf weight, or age, but was significantly longer for femal
es. Immobilization time differed with dose, but not by wolf weight, ag
e, or sex. Total recovery times ranged from 50 to 158 min. There were
no apparent side effects on immobilized animals. Wolves immobilized us
ing a combination of ketamine hydrochloride and acetylpromazine had lo
nger induction time (3.0 +/- 0.8 min) and recovery time (114.7 +/- 29.
2 min). Telazol(R) is an effective and safe agent for immobilizing Eth
iopian wolves and is preferred to ketamine/acetylpromazine.