|
If you are seeing this message, you may be experiencing temporary network problems. Please wait a few minutes and refresh the page. If the problem persists, you may wish to report it to your local Network Manager.
It is also possible that your web browser is not configured or not able to display style sheets. In this case, although the visual presentation will be degraded, the site should continue to be functional. We recommend using the latest version of Microsoft or Mozilla web browser to help minimise these problems.
Wiley InterScience | |||||
  Austral EcologyVolume 25 Issue 3, Pages 283 - 291 Published Online: 24 Dec 2001 © 2010 Ecological Society of Australia Published on behalf of The Ecological Society of Australia (ESA)
Abstract | References | Full Text: HTML, PDF (Size: 289K) | Related Articles | Citation Tracking  Predation by red foxes limits recruitment in populations of eastern grey kangaroos *Correspondence address: Dr P. B. Banks, School of Biological Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia (Email: p.banks@unsw.edu.au). Copyright Blackwell Science Asia Pty. Ltd. KEYWORDS feral predator • juvenile survival • macropod • mother : young ratio • predator control • predator–prey interaction • vertebrate pest ABSTRACTAbstractWe investigated the impact of red fox (Vulpes vulpes Linnaeus 1758) predation on juvenile eastern grey kangaroos (Macropus giganteus Shaw 1790) using a replicated predator removal experiment. In two sites in Namadgi National Park, south-eastern Australia, a persistent 1080 poisoning campaign over 18 months reduced fox density by more than 85%, and to less than 10% of the fox density in two other sites with no fox baiting. Changes in the mother : young ratios and densities of kangaroo populations were monitored twice monthly along 2-km transects in each site from July 1993 to February 1995. Compared to nonremoval sites, where foxes were controlled, 25–40% more females retained juveniles over the period when these young became emergent from the pouch. This higher survival of emergent pouch young resulted in a significantly higher proportion of juveniles in kangaroo populations at fox control sites, which resulted in a significantly higher annual growth rate. We conclude that predation upon juveniles is an important limiting factor for kangaroo populations in Namadgi NP. | 
|
