. The Canadian field-naturalist. . Figure 2. Home ranges of all resident adult P. leucopus that were radio-tracked. The radiotelemetry positions (small circles: solid = night, open = day) and trap capture positions (large circles) are indicated for the males (A) and females (B). The letters next to the radiotelemetry positions identify refuges in trees (T), groundhog burrows (G), small ground burrows (S), and rock piles (R). The nursing females are indicated by N. The small arrows associated with radio- telemetry positions in areas of home range overlap point to the home range to which the pos
. The Canadian field-naturalist. . Figure 2. Home ranges of all resident adult P. leucopus that were radio-tracked. The radiotelemetry positions (small circles: solid = night, open = day) and trap capture positions (large circles) are indicated for the males (A) and females (B). The letters next to the radiotelemetry positions identify refuges in trees (T), groundhog burrows (G), small ground burrows (S), and rock piles (R). The nursing females are indicated by N. The small arrows associated with radio- telemetry positions in areas of home range overlap point to the home range to which the positions belong. Home Range Size Male home ranges averaged ha ( acre, SD = acre) based on 12 to 20 capture and radiotelemetry positions for each animal (Figure 2, Table 1). For the females, an average area of ha ( acre, SD = ) was recorded based on 14 to 24 positions peranimal. The small difference in home area size between the males and females was not significant. These estimates are independent of "edge" effects since the animals living in the border areas were tracked into adjacent fields. Social Interaction There were 15 instances where the fate of the transmitter and collar was known, with 13 units sustaining damage () within 8 days (mode of 4) of the initial collar attachment. Only two mice retained their collars and transmitters throughout the tracking period without damage. These data indicate frequent social interactions of a sustained nature within the population. The eight instances of double capture also support the occurrence of social interactions within the population (Table 4). Four double captures involved only juveniles. Because of the similarity in weights within each pair, it is suggested that litter mates were travelling together. Two scrotal males were involved in the remaining four double captures. These males. Please note that these images are extracted from scanned page images that may have been digitally enhance
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