. The Canadian field-naturalist. 40 The Canadian Field-Naturalist Vol. 95. HELICOPTER SURVEY ARE A 1 965 - 7 7 (1 79K M^) 'â «⢠MOOSE SURVEY ARE A 1 9 7 5 7 7 (2 28K M^) ^ INTENSIVE SURVEY AREA1976-77 (143KM2) 'â¢'â 0 1 2 3 4 5 Figure 1. Location of Moose survey areas within the Rochester Study Area. Methods and Materials Capture, Marking, and Aging During October 1975 - October 1977, 144 Moose were darted from Bell 206 and Hughes 500c helicop- ters, and immobilized with M99 (etorphine hydro- chloride) or a mixture of fentanyl citrate, Rompun, and Wydase, as described by Haigh et al. (1977).
. The Canadian field-naturalist. 40 The Canadian Field-Naturalist Vol. 95. HELICOPTER SURVEY ARE A 1 965 - 7 7 (1 79K M^) 'â «⢠MOOSE SURVEY ARE A 1 9 7 5 7 7 (2 28K M^) ^ INTENSIVE SURVEY AREA1976-77 (143KM2) 'â¢'â 0 1 2 3 4 5 Figure 1. Location of Moose survey areas within the Rochester Study Area. Methods and Materials Capture, Marking, and Aging During October 1975 - October 1977, 144 Moose were darted from Bell 206 and Hughes 500c helicop- ters, and immobilized with M99 (etorphine hydro- chloride) or a mixture of fentanyl citrate, Rompun, and Wydase, as described by Haigh et al. (1977). Ninety-eight (39 bulls, 59 cows) Moose were captured during 29 October - 13 December 1975; 30 (15 bulls, 15 cows) during 22 October 1976 - 19 January 1977; and 16 (3 bulls, 13 cows) were recaptured during 17 October - 21 October 1977. Fifty-nine of the above Moose were fitted with radio-collars; an additonal 66 were given color-coded collars (21 cm wide) for individual identification dur- ing aerial observations. All received numbered metal ear tags bearing our address. An outside incisor was pulled on each animal (excluding calves) for age determination by tooth- cementum annuli (Sergeant and Pimlott 1959; Gasa- way et al. 1978). Relocations Radio-collared Moose were relocated about every 10 d from a Cessna 185 equipped with two four- element yagi antennas connected to a switch box within the first determined approximate position by equalizing signal strength from each antenna, and then located the Moose either visually (79%) or by maximizing signal strength (21%). During summer 1976, locations were also obtained from the ground every 3 d by triangulating radio signals from an 18-m tower and two truck-mounted paired yagi antennas. All locations were recorded on 1000-m-grid maps. Linear distances between successive locations were determined; home range size was estimated using Mohr's (1947) minimum-perimeter-polygon method. Seasons were delineated from mean
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