Feral Cats (Felis Catus L.) On New Zealand Farmland. I. Home Range.

摘要

The movements of a population of feral cats (Felis catus) were monitored on New Zealand farmland over three years by means of radiotelemetry. The number of resident males on the 5.2-km2 study area varied from 5 to 9, averaging 1.34 per km2, compared with 10-13 females, averaging 2.19 per km2. The average density over three years was 3.47 cats per km2. The nocturnal home range was significantly larger than the diurnal home range in both sexes. Adult female's home ranges overlapped considerably; adult males tended to occupy exclusive home ranges or territories with little overlap, but including those of several females. Adult males and females that used barns as den sites were mainly nocturnal and had larger home ranges than females denning in vegetation. Females showed no consistent change in home-range size with season, although those breeding in barns had larger home ranges in summer. Adult males had larger territories in summer and winter. Dispersing subadult males had a similar home range to adult males. Death or disappearance of a dominant male allcwed new males to occupy the vacated territory. Two subadults were tracked by day until they became adult and acquired territories within the study area.