Drug immobilization of walrus ( Odobenus rosmarus )
Five out of nine walrus ( Odobenus rosmarus ) were successfully immobilized at Round Island, Alaska, in May of 1978 by combinations of phencyclidine hydrochloride and acepromazine hydrochloride. A crossbow was an effective delivery technique. Walruses that had recently hauled out were more suitable for immobilization than well-rested animals. Care was taken to prevent walruses from overheating or suffocating.
Canadian Journal of Fisheries and Aquatic Sciences↗