Investigating brushtail possum (Trichosurus vulpecula) home-range size determinants in a New Zealand native forest
K. S. Richardson A B F G , C. Rouco C D F G , C. Jewell E , N. P. French A , B. M. Buddle B and D. M. Tompkins C
+ Author Affiliations
- Author Affiliations
A EpiLab, Hopkirk Research Institute, Massey University, Palmerston North, New Zealand.
B AgResearch, Hopkirk Research Institute, Palmerston North, New Zealand.
C Landcare Research, 764 Cumberland Street, Dunedin 9016, New Zealand.
D Present address: Departamento de Zoología, Campus de Rabanales, Universidad de Córdoba, 14071 Córdoba, Spain.
E Lancaster Medical School, Lancaster University, Lancaster, United Kingdom.
F These authors have contributed equally to this work.
G Corresponding authors. Email: kyle.richardson221@gmail.com; roucoc@landcareresearch.co.nz; c.rouco@gmail.com
Wildlife Research 44(4) 316-323 https://doi.org/10.1071/WR16215
Submitted: 3 March 2016 Accepted: 15 May 2017 Published: 26 June 2017
Abstract
Context: The Australian brushtail possums (Trichosurus vulpecula) introduction to New Zealand has exacted a heavy toll on native biodiversity and presented the country with its greatest wildlife reservoir host for bovine tuberculosis (TB). Management efforts to control both possums and TB have been ongoing for decades, and the biology of possums has been studied extensively in Australia and New Zealand over the past 50 years; however, we still do not have a clear understanding of its home-range dynamics.
Aims: To investigate determinants of home range size by using a uniquely large dataset in the Orongorongo Valley, a highly monitored research area in New Zealand and compare our findings with those of other studies.
Methods: Possum density was estimated, for subpopulations on four 13-ha cage-trap grids, by the spatially explicit capture–mark–recapture analysis of trapping data from 10 consecutive months. Home ranges were estimated from trap locations using a 100% minimum convex polygon (MCP) method for 348 individuals and analysed with respect to grid, age and sex.
Key results: Mean (standard error) possum density, estimated as 4.87 (0.19), 6.92 (0.29), 4.08 (0.21) and 4.20 (0.19) ha–1 for the four grids, was significantly negatively correlated with mean MCP home-range size. Grid, age, and the interaction of age and sex were significantly related to home-range size. Older possums had larger home ranges than did younger possums. When ‘juvenile cohort’ and ‘adult cohort’ data were analysed separately, to investigate the significant interaction, males in the ‘adult cohort’ had significantly larger home ranges than did females, with the grid effect still being apparent, whereas neither sex nor grid effects were significant for the ‘juvenile cohort’.
Conclusions: Our findings indicate that, in addition to density, age and sex are likely to be consistent determinants of possum home-range size, but their influences may be masked in some studies by the complexity of wild-population dynamics.
Implications: Our findings have strong implications regarding both disease transmission among possums and possum management. The fact that adult males occupy larger home ranges and the understanding that possum home range increases as population density decreases are an indication that males may be the primary drivers of disease transmission in possum populations. The understanding that possum home range increases as population density decreases could be a direct reflection of the ability of TB to persist in the wild that counteracts current management procedures. If individuals, and particularly males, infected with TB can withstand control measures, their ensuing home-range expansion will result in possible bacteria spread in both the expanded area of habitation and new individuals becoming subjected to infection (both immigrant possums and other control survivors). Therefore, managers should consider potential approaches for luring possum males in control operations.
Additional keywords: age, density, population structure, possum management, sex.
References
Ball, S., Ramsey, J. D., Nugent, G., Warburton, B., and Efford, M. (2005). A method for estimating wildlife detection probabilities in relation to home-range use: insights from a field study on the common brushtail possum (Trichosurus vulpecula). Wildlife Research 32, 217–227.| A method for estimating wildlife detection probabilities in relation to home-range use: insights from a field study on the common brushtail possum (Trichosurus vulpecula).Crossref | GoogleScholarGoogle Scholar |
Blackie, H. M., Russell, J. C., and Clout, M. N. (2011). Maternal influence on philopatry and space use by juvenile brushtail possums (Trichosurus vulpecula). Journal of Animal Ecology 80, 477–483.
| Maternal influence on philopatry and space use by juvenile brushtail possums (Trichosurus vulpecula).Crossref | GoogleScholarGoogle Scholar |
Borchers, D. L., and Efford, M. (2008). Spatially explicit maximum likelihood methods for capture–recapture studies. Biometrics 64, 377–385.
| Spatially explicit maximum likelihood methods for capture–recapture studies.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BD1czhvVWlsA%3D%3D&md5=f15bbfa5919e516b8ff1a400b0dad326CAS |
Clout, M., and Efford, M. (1984). Sex differences in the dispersal and settlement of brushtail possums (Trichosurus vulpecula). Journal of Animal Ecology 53, 737–749.
| Sex differences in the dispersal and settlement of brushtail possums (Trichosurus vulpecula).Crossref | GoogleScholarGoogle Scholar |
Crawley, M. (1973). A live-trapping of Australian brush-tailed possums, (Trichosurus vulpecula), in the Orongorongo Valley, Wellington, New Zealand. Australian Journal of Zoology 21, 75–90.
| A live-trapping of Australian brush-tailed possums, (Trichosurus vulpecula), in the Orongorongo Valley, Wellington, New Zealand.Crossref | GoogleScholarGoogle Scholar |
DeGabriel, J. L., Moore, B. D., Foley, W. J., and Johnson, C. N. (2009). The effects of plant defensive chemistry on nutrient availability predict reproductive success in a mammal. Ecology 90, 711–719.
| The effects of plant defensive chemistry on nutrient availability predict reproductive success in a mammal.Crossref | GoogleScholarGoogle Scholar |
DeGabriel, J. L., Moore, B. D., Foley, W. J., and Johnson, C. N. (2014). Male-biased predation and its effect on paternity skew and life history in a population of common brushtail possums (Trichosurus vulpecula). PLoS One 9, e111746.
| Male-biased predation and its effect on paternity skew and life history in a population of common brushtail possums (Trichosurus vulpecula).Crossref | GoogleScholarGoogle Scholar |
Dunnet, G. M. (1956). A live-trapping study of the brush-tailed possum Trichosurus vulpecula Kerr (Marsupialia). Wildlife Research 1, 1–18.
| A live-trapping study of the brush-tailed possum Trichosurus vulpecula Kerr (Marsupialia).Crossref | GoogleScholarGoogle Scholar |
Efford, M. G. (1991). The ecology of an uninfected forest possum population. In ‘Symposium on Tuberculosis’. Veterinary Continuing Education, p. 132. (Massey University: Palmerston North, New Zealand.)
Efford, M. (2004). Density estimation in live-trapping studies. Oikos 106, 598–610.
| Density estimation in live-trapping studies.Crossref | GoogleScholarGoogle Scholar |
Efford, M., and Cowan, P. (2004). Long-term population trend of the brushtail possums (Trichosurus vulpecula) in the Orongorongo Valley, New Zealand. In ‘The Biology of Australian Possums and Gliders’. (Eds R. L. Goldingay and S. M. Jackson.) pp. 471–483. (Surrey Beatty: Sydney, NSW, Australia.)
Efford, M., Warburton, B., and Spencer, N. (2000). Home-range changes by brushtail possums in response to control. Wildlife Research 27, 117–127.
| Home-range changes by brushtail possums in response to control.Crossref | GoogleScholarGoogle Scholar |
Efford, M. G., Warburton, B., Coleman, M. C., and Barker, R. J. (2005). A field test of two methods for density estimation. Wildlife Society Bulletin 33, 731–738.
| A field test of two methods for density estimation.Crossref | GoogleScholarGoogle Scholar |
Efford, M., Dawson, D. K., Jhala, Y. V., and Qureshi, Q. (2016). Density-dependent home-range size revealed by spatially explicit capture–recapture. Ecography 39, 676–688.
| Density-dependent home-range size revealed by spatially explicit capture–recapture.Crossref | GoogleScholarGoogle Scholar |
Fitzgerald, A. E. (1976). Diet of the opossum (Trichosuvus vulpecula) in the Orongorongo Valley, Wellington, New Zealand, in relation to food‐plant availability. New Zealand Journal of Zoology 3, 399–419.
| Diet of the opossum (Trichosuvus vulpecula) in the Orongorongo Valley, Wellington, New Zealand, in relation to food‐plant availability.Crossref | GoogleScholarGoogle Scholar |
Fletcher, T., and Selwood, L. (2000). Possum reproduction and development. Possum reproduction and development. In ‘The Brushtail Possum: Biology, Impact and Management of an Introduced Marsupial’. (Ed. T. Montague.) pp. 62–81. (Manaaki Whenua Press: Lincoln, New Zealand.)
Glen, A. S., Byrom, A. E., Pech, R. P., Cruz, J., Schwab, A., Sweetapple, P. J., Yockney, I., Nugent, G., Coleman, M., and Whitford, J. (2012). Ecology of brushtail possums in a New Zealand dryland ecosystem. New Zealand Journal of Ecology 36, 29–37.
Harper, M. J. (2005). Home range and den use of common brushtail possums (Trichosurus vulpecula) in urban forest remnants. Wildlife Research 32, 681–687.
| Home range and den use of common brushtail possums (Trichosurus vulpecula) in urban forest remnants.Crossref | GoogleScholarGoogle Scholar |
Holland, E. P., Pech, R. P., Ruscoe, W. A., Parkes, J. P., Nugent, G., and Duncan, R. P. (2013). Thresholds in plant–herbivore interactions: predicting plant mortality due to herbivore browse damage. Oecologia 172, 751–766.
| Thresholds in plant–herbivore interactions: predicting plant mortality due to herbivore browse damage.Crossref | GoogleScholarGoogle Scholar |
How, R. A. (1981). Population parameters of two congeneric possums, Trichosurus spp., in north-eastern New South Wales. Australian Journal of Zoology 29, 205–215.
| Population parameters of two congeneric possums, Trichosurus spp., in north-eastern New South Wales.Crossref | GoogleScholarGoogle Scholar |
Jennions, M. D., and Møller, A. P. (2003). A survey of the statistical power of research in behavioral ecology and animal behavior. Behavioral Ecology 14, 438–445.
| A survey of the statistical power of research in behavioral ecology and animal behavior.Crossref | GoogleScholarGoogle Scholar |
Kenward, R. E. (2001) ‘A Manual for Wildlife Radiotagging.’ (Academic Press: London.)
Kenward, R. E., South, A. B., and Walls, S. S. (2003). ‘Ranges 6 v1.2: For the Analysis of Tracking and Location Data.’ Online Manual. (Anatrack: Wareham, UK.) Available at http://www.anatrack.com [accessed 31 May 2017].
Kerle, J. A. (1984). Variation in the ecology of Trichosurus: its adaptive significance. In ‘Possums and Gliders’. (Eds A. P. Smith and I. D. Hume.) pp. 115–128. (Surrey Beatty: Sydney, NSW, Australia.)
Kerle, J. A. (1998). The population dynamics of a tropical possum, Trichosurus vulpecula arnhemensis Collett. Wildlife Research 25, 171–181.
| The population dynamics of a tropical possum, Trichosurus vulpecula arnhemensis Collett.Crossref | GoogleScholarGoogle Scholar |
Kerle, A. (2001). ‘The Brushtails, Ringtails and Greater Gilder.’ (University of New South Wales Press: Sydney, NSW, Australia.)
Laver, P. N., and Kelly, M. J. (2008). A critical review of home range studies. The Journal of Wildlife Management 72, 290–298.
| A critical review of home range studies.Crossref | GoogleScholarGoogle Scholar |
Link, W. A. (2003). Nonidentifiability of Population size from capture–recapture data with heterogeneous detection probabilities. Biometrics 59, 1123–1130.
| Nonidentifiability of Population size from capture–recapture data with heterogeneous detection probabilities.Crossref | GoogleScholarGoogle Scholar |
Mohr, C. O. (1947). Table of equivalent populations of North American small mammals. American Midland Naturalist 37, 223–249.
Monks, A., and Tompkins, D. M. (2012). Optimising bait-station delivery of population-control agents to brushtail possums: field test of spatial model predictions. Wildlife Research 39, 62–69.
| Optimising bait-station delivery of population-control agents to brushtail possums: field test of spatial model predictions.Crossref | GoogleScholarGoogle Scholar |
Montague, T. L., and Warburton, B. (2000). Non-toxic techniques for possum control. In ‘The Brushtail Possum: Biology, Impact and Management of an Introduced Marsupial’. (Ed. T. Montague.) pp. 164–174. (Manaaki Whenua Press: Lincoln, New Zealand.)
Morgan, D., Scobie, S., and Arthur, D. (2012). Evaluation of Zoletil and other injectable anaesthetics for field sedation of brushtail possums (Trichosurus vulpecula). Animal Welfare (South Mimms, England) 21, 457–462.
| Evaluation of Zoletil and other injectable anaesthetics for field sedation of brushtail possums (Trichosurus vulpecula).Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38Xhs1eisLbL&md5=698e0664a5960b186dabc6e3a8e148a2CAS |
O’Brien, C., Van Riper, C., and Myers, D. E. (2009). Making reliable decisions in the study of wildlife diseases: using hypothesis tests, statistical power, and observed effects. Journal of Wildlife Diseases 45, 700–712.
| Making reliable decisions in the study of wildlife diseases: using hypothesis tests, statistical power, and observed effects.Crossref | GoogleScholarGoogle Scholar |
Paterson, B., Morris, R., Weston, J., and Cowan, P. (1995). Foraging and denning patterns of brushtail possums and their possible relationship to contact with cattle and the transmission of bovine tuberculosis. New Zealand Veterinary Journal 43, 281–288.
| Foraging and denning patterns of brushtail possums and their possible relationship to contact with cattle and the transmission of bovine tuberculosis.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BD2MzntlOrtw%3D%3D&md5=08778edd6513db7a2ba434a8b821e1b4CAS |
Pech, R., Byrom, A., Anderson, D., Thomson, C., and Coleman, M. (2010). The effect of poisoned and notional vaccinated buffers on possum (Trichosurus vulpecula) movements: minimising the risk of bovine tuberculosis spread from forest to farmland. Wildlife Research 37, 283–292.
| The effect of poisoned and notional vaccinated buffers on possum (Trichosurus vulpecula) movements: minimising the risk of bovine tuberculosis spread from forest to farmland.Crossref | GoogleScholarGoogle Scholar |
Ramsey, D. S., and Cowan, P. (2003). Mortality rates and movements of brushtail possums with clinical tuberculosis (Mycobacterium bovis infection). New Zealand Veterinary Journal 51, 179–185.
| Mortality rates and movements of brushtail possums with clinical tuberculosis (Mycobacterium bovis infection).Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BD2MznsVaguw%3D%3D&md5=a7d4add85337c6ebb5824e6e3f5a23d1CAS |
Ramsey, D. S., and Efford, M. G. (2010). Management of bovine tuberculosis in brushtail possums in New Zealand: predictions from a spatially explicit, individual‐based model. Journal of Applied Ecology 47, 911–919.
| Management of bovine tuberculosis in brushtail possums in New Zealand: predictions from a spatially explicit, individual‐based model.Crossref | GoogleScholarGoogle Scholar |
Ramsey, D. S. L., Coleman, J. D., Coleman, M. C., and Horton, P. (2006). The effect of fertility control on the transmission of bovine tuberculosis in wild brushtail possums. New Zealand Veterinary Journal 54, 218–223.
| The effect of fertility control on the transmission of bovine tuberculosis in wild brushtail possums.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BD28rps1yjsw%3D%3D&md5=384286b519b505ab9b6e830f24091cd9CAS |
Rouco, C., and Norbury, G. (2015). Short-term influence of snow cover on movements and habitat use by brushtail possums (Trichosurus vulpecula). New Zealand Journal of Ecology 39, 303–308.
Rouco, C., Norbury, G. L., Smith, J., Byrom, A. E., and Pech, R. P. (2013). Population density estimates of brushtail possums (Trichosurus vulpecula) in dry grassland in New Zealand. New Zealand Journal of Ecology 37, 12–17.
Rouco, C., Norbury, G., and Anderson, D. (2017). Movements and habitat preferences of pests help improve population control: the case of common brushtail possums in a New Zealand dryland ecosystem. Pest Management Science 73, 287–294.
| Movements and habitat preferences of pests help improve population control: the case of common brushtail possums in a New Zealand dryland ecosystem.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC28XktV2nsr4%3D&md5=63cee4ab8b7f072a22300fab85326e69CAS |
Statham, M., and Statham, H. L. (1997). Movements and habits of brushtail possums (Trichosurus vulpecula) in an urban area. Wildlife Research 24, 715–726.
| Movements and habits of brushtail possums (Trichosurus vulpecula) in an urban area.Crossref | GoogleScholarGoogle Scholar |
Tompkins, D. M., and Ramsey, D. (2007). Optimising bait-station delivery of fertility control agents to brushtail possum populations. Wildlife Research 34, 67–76.
| Optimising bait-station delivery of fertility control agents to brushtail possum populations.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2sXit1art78%3D&md5=7f3e5dce6dcd746362b81ca8afdb2566CAS |
Ward, G. D. (1984). Comparison of trap- and radio-revealed home ranges of the brush-tailed possum (Trichosurus vulpecula Kerr) in New Zealand lowland forest. New Zealand Journal of Zoology 11, 85–92.
| Comparison of trap- and radio-revealed home ranges of the brush-tailed possum (Trichosurus vulpecula Kerr) in New Zealand lowland forest.Crossref | GoogleScholarGoogle Scholar |
Ward, G. D. (1985). The fate of young radiotagged common brushtail possums, Trichosurus vulpecula, in New Zealand lowland forest. Wildlife Research 12, 145–150.
| The fate of young radiotagged common brushtail possums, Trichosurus vulpecula, in New Zealand lowland forest.Crossref | GoogleScholarGoogle Scholar |
Whyte, B. I., Ross, J. G., and Blackie, H. M. (2013). Differences in brushtail possum home-range characteristics among sites of varying habitat and population density. Wildlife Research 40, 537–544.
| Differences in brushtail possum home-range characteristics among sites of varying habitat and population density.Crossref | GoogleScholarGoogle Scholar |
Yockney, I., Nugent, G., Latham, M., Perry, M., Cross, M., and Byrom, A. (2013). Comparison of ranging behaviour in a multi-species complex of free-ranging hosts of bovine tuberculosis in relation to their use as disease sentinels. Epidemiology and Infection 141, 1407–1416.
| Comparison of ranging behaviour in a multi-species complex of free-ranging hosts of bovine tuberculosis in relation to their use as disease sentinels.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BC3svgsFyltQ%3D%3D&md5=9bc393af90c2aa0bfadcd42b747844feCAS |
