A decade of monitoring the remnant Victorian population of the brush-tailed rock-wallaby (Petrogale penicillata)
Lucas A. Bluff A B C , Lucy Clausen A , Amie Hill A and Michael D. Bramwell A
+ Author Affiliations
- Author Affiliations
A Department of Sustainability and Environment, 574 Main Street, Bairnsdale, Vic. 3875, Australia.
B School of Biological Sciences, Monash University, Vic. 3800, Australia.
C Corresponding author. Email: lucas.bluff@sci.monash.edu
Australian Mammalogy 33(2) 195-201 https://doi.org/10.1071/AM10037
Submitted: 29 October 2010 Accepted: 29 April 2011 Published: 12 September 2011
Abstract
Historically, the brush-tailed rock-wallaby (Petrogale penicillata), occurred throughout the Great Dividing Range from southern Queensland to western Victoria. Within Victoria, this extensive range has now contracted to a single remnant population in the Little River Gorge in East Gippsland, and the species is classified as ‘Critically Endangered’. Here we summarise the key results from 10 years of monitoring and management of the Little River Gorge population. The count of individuals detected biannually rose from one in 2000 to 12 in 2008, but this increase was at least partially due to variation in monitoring methodology. Apparent mortality rate in the first year of life was 69%, suggesting that predation was the strongest extrinsic factor limiting the population. Fecundity rate among fertile females was estimated at 1.14 births per annum. Rainfall did not significantly predict birth rate, juvenile mortality or sex ratio. Comparison of three monitoring techniques (cage traps, remote camera surveillance and genetic analysis of scats) revealed that each detected a different subset of the population in this study. These techniques should be considered complementary, rather than substitutable, in future monitoring of small Petrogale populations.
Additional keywords: fecundity rate, mortality rate, population dynamics, predation, remote camera, remote surveillance.
References
Banks, P. B., Newsome, A. E., and Dickman, C. R. (2000). Predation by red foxes limits recruitment in populations of eastern grey kangaroos. Austral Ecology 25, 283–291.| Predation by red foxes limits recruitment in populations of eastern grey kangaroos.Crossref | GoogleScholarGoogle Scholar |
Bramwell, M. D., Andrews, L., Brook, L., Corrigan, T., Stevens, M., Schultz, D., and Taggart, D. A. (2008). Reintroduction plan for the release of brush-tailed rock-wallabies (Petrogale penicillata) into Moora Moora Creek, Grampians National Park, Victoria. Department of Sustainability and Environment, Bairnsdale, Victoria.
Browning, T. L., Rummery, C., Taggart, D. A., Close, R. L., and Eldridge, M. D. B. (2001). Multifaceted genetic analysis of the “Critically Endangered” brush-tailed rock-wallaby Petrogale penicillata in Victoria, Australia: implications for management. Conservation Genetics 2, 145–156.
| Multifaceted genetic analysis of the “Critically Endangered” brush-tailed rock-wallaby Petrogale penicillata in Victoria, Australia: implications for management.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3MXotFGgs74%3D&md5=de856fffa7dcd040c083a5dadefef988CAS |
Caughley, J., Bayliss, P., and Giles, J. (1984). Trends in kangaroo numbers in western New South Wales and their relation to rainfall. Australian Wildlife Research 11, 415–422.
| Trends in kangaroo numbers in western New South Wales and their relation to rainfall.Crossref | GoogleScholarGoogle Scholar |
Cooch, E., and White, G. (2010). Program MARK: a gentle introduction. 9th edn. Available at http://www.phidot.org/software/mark/docs/book/ [Verified 2 August 2010].
Corrigan, T. (2009). A population viability analysis for a Petrogale penicillata population in East Gippsland, Victoria. Unpublished report to the Department of Sustainability and Environment, Victoria.
Delaney, R. (1997). Population dynamics of the allied rock-wallaby Petrogale assimilis: implications for conservation. Australian Mammalogy 19, 199–207.
Delaney, R., Temple-Smith, P., and McLean, N. (2005). Translocation strategy for the brush-tailed rock-wallaby in Victoria. Unpublished report to the Department of Sustainability and Environment, Victoria.
Department of Environment and Climate Change. (2008). Recovery plan for the brush-tailed rock-wallaby (Petrogale penicillata). Department of Environment and Climate Change, Sydney.
Department of Sustainability and Environment. (2010a). Flora and Fauna Guarantee Act 1988: Threatened List. Department of Sustainability and Environment, Melbourne.
Department of Sustainability and Environment. (2010b). Flora and Fauna Guarantee Action Statement No. 19: Brush-tailed rock-wallaby Petrogale penicillata. Department of Sustainability and Environment, Melbourne.
Grafen, A., and Hails, R. (2002). ‘Modern Statistics for the Life Sciences.’ (Oxford Press: Oxford.)
Hazlitt, S. L., Eldridge, M. D. B., and Goldizen, A. W. (2004). Fine-scale genetic correlation analyses reveal strong female philopatry within a brush-tailed rock-wallaby colony in southeast Queensland. Molecular Ecology 13, 3621–3632.
| Fine-scale genetic correlation analyses reveal strong female philopatry within a brush-tailed rock-wallaby colony in southeast Queensland.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BD2crnvFyrsg%3D%3D&md5=3f96a390038bf7bd38ee4e098872af66CAS |
Jarman, P. J., and Bayne, P. (1997). Behavioural ecology of Petrogale penicillata in relation to conservation. Australian Mammalogy 19, 219–228.
Kinnear, J. E., Onus, M. L., and Bromilow, R. N. (1988). Fox control and rock-wallaby population dynamics. Australian Wildlife Research 15, 435–450.
| Fox control and rock-wallaby population dynamics.Crossref | GoogleScholarGoogle Scholar |
Kinnear, J. E., Onus, M. L., and Sumner, N. R. (1998). Fox control and rock-wallaby population dynamics – II. An update. Wildlife Research 25, 81–88.
| Fox control and rock-wallaby population dynamics – II. An update.Crossref | GoogleScholarGoogle Scholar |
Laws, R. J., and Goldizen, A. W. (2003). Nocturnal home ranges and social interactions of the brush-tailed rock-wallaby Petrogale penicillata at Hurdle Creek, Queensland. Australian Mammalogy 25, 169–176.
Lee, A. K. (2001). Review of the Victorian brush-tailed rock-wallaby recovery program. Unpublished report to the Department of Sustainability and Environment, Victoria.
Lethbridge, M. R., and Alexander, P. J. (2008). Comparing population growth rates using weighted bootstrapping: guiding the conservation management of Petrogale xanthopus xanthopus (yellow-footed rock-wallaby). Biological Conservation 141, 1185–1195.
| Comparing population growth rates using weighted bootstrapping: guiding the conservation management of Petrogale xanthopus xanthopus (yellow-footed rock-wallaby).Crossref | GoogleScholarGoogle Scholar |
Lunney, D., Law, B., and Rummery, C. (1996). Contrast between the visible abundance of the brush-tailed rock-wallaby, Petrogale penicillata, and its rarity in fox and dog scats in the gorges east of Armidale, New South Wales. Wildlife Research 23, 373–380.
| Contrast between the visible abundance of the brush-tailed rock-wallaby, Petrogale penicillata, and its rarity in fox and dog scats in the gorges east of Armidale, New South Wales.Crossref | GoogleScholarGoogle Scholar |
Lunney, D., Law, B., and Rummery, C. (1997). An ecological interpretation of the historical decline of the brush-tailed rock-wallaby Petrogale penicillata in New South Wales. Australian Mammalogy 19, 281–296.
Molyneux, J. (2010). Habitat use and home range in a reintroduced population of brush-tailed rock-wallabies (Petrogale penicillata) in Grampians National Park, Victoria. B.Sc.(Honours) Thesis, University of Adelaide.
Murphy, B. F., and Timbal, B. (2008). A review of recent climate variability and climate change in southeastern Australia. International Journal of Climatology 28, 859–879.
| A review of recent climate variability and climate change in southeastern Australia.Crossref | GoogleScholarGoogle Scholar |
Norris, K. C., and Belcher, C. A. (1986). The brush-tailed rock-wallaby in Gippsland. Unpublished report to the Department of Conservation, Forests and Lands, Victoria.
Paplinska, J. Z., Taggart, D. A., Corrigan, T., Eldridge, M. D. B., and Austin, J. J. (2011). Using DNA from museum specimens to preserve the integrity of evolutionarily significant unit boundaries in threatened species. Biological Conservation 144, 290–297.
| Using DNA from museum specimens to preserve the integrity of evolutionarily significant unit boundaries in threatened species.Crossref | GoogleScholarGoogle Scholar |
Prober, S. M., and Thiele, K. R. (2005). Effect of the 2003 Bogong Complex fires on brush-tailed rock-wallaby habitat and Acacia doratoxylon scrubs in Little River Gorge, East Gippsland. Unpublished report to the Department of Sustainability and Environment, Victoria.
Sharp, A. (1997). Insights into the dispersal patterns of yellow-footed rock-wallabies, Petrogale xanthopus. Australian Mammalogy 19, 229–238.
Sharp, A. (2002). The ecology and conservation biology of the yellow-footed rock-wallaby. Ph.D. Thesis, University of Queensland, Brisbane.
Sharp, A., and McCallum, H. (2010). The decline of a large yellow-footed rock-wallaby (Petrogale xanthopus) colony following a pulse of resource abundance. Australian Mammalogy 32, 99–107.
| The decline of a large yellow-footed rock-wallaby (Petrogale xanthopus) colony following a pulse of resource abundance.Crossref | GoogleScholarGoogle Scholar |
Sharp, A., and Norton, M. (2000). Dynamics of the New South Wales yellow-footed rock-wallaby population, in relation to rainfall patterns. Australian Mammalogy 22, 71–79.
Sharp, A., Norton, M., and Marks, A. (2006). Demography of a yellow-footed rock-wallaby (Petrogale xanthopus) colony in the threatened New South Wales sub-population. Australian Mammalogy 28, 215–227.
Short, J., and Milkovits, G. (1990). Distribution and status of the brush-tailed rock-wallaby in South-eastern Australia. Australian Wildlife Research 17, 169–179.
| Distribution and status of the brush-tailed rock-wallaby in South-eastern Australia.Crossref | GoogleScholarGoogle Scholar |
Siegel, S. (1956). ‘Nonparametric Statistics for the Behavioural Sciences.’ (McGraw-Hill: New York.)
Spencer, P. B. S. (1991). Evidence of predation by a feral cat Felis catus (Carnivora: Felidae) on an isolated rock-wallaby colony in tropical Queensland. Australian Mammalogy 14, 143–144.
Taggart, D. A., Schultz, D., White, C., Whitehead, P., Underwood, G., and Phillips, K. (2005). Cross-fostering, growth and reproductive studies in the brush-tailed rock-wallaby, Petrogale penicillata (Marsupialia: Macropodidae): efforts to accelerate breeding in a threatened marsupial species. Australian Journal of Zoology 53, 313–323.
| Cross-fostering, growth and reproductive studies in the brush-tailed rock-wallaby, Petrogale penicillata (Marsupialia: Macropodidae): efforts to accelerate breeding in a threatened marsupial species.Crossref | GoogleScholarGoogle Scholar |
Wakefield, N. A. (1954). The rediscovery of the rock-wallaby in Victoria. The Victorian Naturalist 70, 202–206.
Wakefield, N. A. (1961). Victoria’s rock-wallabies. The Victorian Naturalist 77, 322–332.
Wakefield, N. A. (1963). Notes on rock-wallabies. The Victorian Naturalist 80, 169–176.
Wynd, N. M., Sigg, D. P., Pople, A. R., Hazlitt, S. L., and Goldizen, A. W. (2006). Factors affecting female reproductive success and the survival of pouch young in the threatened brush-tailed rock-wallaby, Petrogale penicillata. Australian Journal of Zoology 54, 61–70.
| Factors affecting female reproductive success and the survival of pouch young in the threatened brush-tailed rock-wallaby, Petrogale penicillata.Crossref | GoogleScholarGoogle Scholar |
