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Density and home range of feral cats in north-western Australia

Citation

McGregor, HW and Legge, S and Potts, J and Jones, ME and Johnson, CN, Density and home range of feral cats in north-western Australia, Wildlife Research, 42, (3) pp. 223-231. ISSN 1035-3712 (2015) [Refereed Article]

Copyright Statement

Journal compilation copyright CSIRO 2015

DOI: doi:10.1071/WR14180

Abstract

Context: Feral cats (Felis catus) pose a significant threat to biodiversity in Australia, and are implicated in current declines of small mammals in the savannas of northern Australia. Basic information on population density and ranging behaviour is essential to understand and manage threats from feral cats.

Aims: In this study, we provide robust estimates of density and home range of feral cats in the central Kimberley region of north-western Australia, and we test whether population density is affected by livestock grazing, small mammal abundance and other environmental factors.

Methods: Densities were measured at six transects sampled between 2011 and 2013 using arrays of infrared cameras. Cats were individually identified, and densities estimated using spatially explicit capture–recapture analysis. Home range was measured from GPS tracking of 32 cats.

Key results: Densities were similar across all transects and deployments, with a mean of 0.18 cats km–2 (range = 0.09–0.34 km–2). We found no evidence that population density was related to livestock grazing or abundance of small mammals. Home ranges of males were, on average, 855 ha (±156 ha (95% CI), n = 25), and those of females were half the size at 397 ha (±275 ha (95% CI), n = 7). There was little overlap in ranges of cats of the same sex.

Conclusions: Compared with elsewhere in Australia outside of semiarid regions, feral cats occur at low density and have large home ranges in the central Kimberley. However, other evidence shows that despite this low density, cats are contributing to declines of small mammal populations across northern Australia.

Implications: It will be very difficult to reduce these already-sparse populations by direct control. Instead, land-management practices that reduce the impacts of cats on prey should be investigated.

Item Details

Item Type:Refereed Article
Keywords:feral cats, biodiversity, density, home range, north-western Australia
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Community Ecology
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Flora, Fauna and Biodiversity at Regional or Larger Scales
Author:McGregor, HW (Dr Hugh McGregor)
Author:Jones, ME (Associate Professor Menna Jones)
Author:Johnson, CN (Professor Christopher Johnson)
ID Code:105647
Year Published:2015
Web of Science® Times Cited:13
Deposited By:Zoology
Deposited On:2016-01-12
Last Modified:2017-11-01
Downloads:0

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