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Bobcat Climbed High To Escape
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The sizes of bobcat's home ranges vary significantly; a World Conservation Union (IUCN) summary of research suggests ranges anywhere from 0.02 to 126 sq mi (0.052 to 330 km2). One study in Kansas found resident males to have roughly an 8 sq mi (21 km2) range and females less than half that area. Transient bobcats were found to have both a larger (roughly 22 sq mi/57 km2) and less well-defined home range. Kittens had the smallest range at about 3 sq mi (7.8 km2). Research has shown that dispersal from the natal range is most pronounced with males.
Reports on seasonal variation in range size have been equivocal. One study found a large variation in male range sizes, from 16 sq mi (41 km2) in summer up to 40 sq mi (100 km2) in winter. Another found that female bobcats, especially those which were reproductively active, expanded their home range in winter, but that males merely shifted their range without expanding it, which was consistent with numerous earlier studies. Other research in various American states has shown little or no seasonal variation.
Like most felines, the bobcat is largely solitary but ranges will often overlap. Unusually for a cat, males are more tolerant of overlap, while females rarely wander into others' ranges. Given their smaller range sizes, two or more females may reside within a male's home range. When multiple male territories overlap a dominance hierarchy is often established resulting in the exclusion of some transients from favored areas.
In line with widely differing estimates of home range size, population density figures are divergent: anywhere from 1 to 38 bobcats per 25 sq mi (65 km2) in one survey. The average is estimated at one bobcat per 5 square miles (10 km2). A link has been observed between population density and sex ratio. One study noted that a dense, unharvested population in California had a sex ratio of 2.1 males per female. When the density decreased, the sex ratio skewed to 0.86 males per female. Another study observed a similar ratio, and suggested that males may be better able to cope with the increased competition, and that this would help limit reproduction until various factors lowered the density.
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