There is no certain way of ascertaining that wolves are related or that they belong to the same pack. Thus to maximize chances that members of the same pack would be captured, the trapper set traps where he suspected only one pack ranged. To try to determine whether the individual wolves he caught were socially related, we instructed the trapper to hold the wolves in individual pens until we could observe their introductions to each other. Wolves No. 10 and 11 were placed together on January 23, 1974, and No. 13 and 14 were released into the pen with No. 10 and 11 on February 4. [Illustration: _Fig. 6.--Before being transported to Michigan, each wolf was weighed (USFWS Photo by Don Reilly)_] _Table 2. Background information on the translocated wolves_ ---------------------------------------------------------------------- Wolf Number 10 11 12 13 ---------------------------------------------------------------------- Sex F F M M Estimated age[9] 1-2 years 6-7 years 2-3 years 2-3 years Capture date 12-24-73 1-5-74 1-19-74 1-21-74 Capture Method Trapped Trapped Trapped Live-snared Capture foot Left front Right front Right front Capture-related Two nails Three nails None None damage lost lost Weight at 55 lb. 65 lb. 74 lb. 75 lb. capture (24.9 kg) (29.4 kg) (33.5 kg) (33.9 kg) Weight, March 5 46 lb. 58 lb. 66 lb. 60 lb. (20.8 kg.) (26.3 kg) (29.9 kg) (27.2 kg) % weight loss 16% 11% 11% 20% Canine length, 0.83" 0.25-0.50" 0.93" 0.87" upper (21 mm) (6-13 mm) (24 mm) (22 mm) Canine length, 0.75" very worn 0.82" 0.85" lower (19 mm) (21 mm) (21 mm) Testes[10] ---- ---- 0.5 × 1.0" 0.5 × 0.75" (13×25 mm) (13×19 mm) Teats Tiny, not Dark, ---- ---- apparent evident ---------------------------------------------------------------------- [9] Gross subjective estimates based on tooth wear [10] Estimated On March 5, 1974, the wolves were again immobilized for pre-release processing in Minnesota. An initial dose, and several supplemental doses of phencyclidine and promazine were administered intramuscularly and intraperitoneally between 9:00 a.m. and 4:30 p.m. CDT. The wolves were restrained with muzzles and their legs were bound together during processing and transport. Two of the wolves were blindfolded because they were too active otherwise.