The efficacy of monitoring techniques for detecting small mammals and reptiles in arid environments
J. Molyneux A D , C. R. Pavey B , A. I. James C and S. M. Carthew A
+ Author Affiliations
- Author Affiliations
A Charles Darwin University, Research Institute for Environments and Livelihoods, Darwin, NT 0909, Australia.
B CSIRO, Land and Water, PMB 44, Winnellie, NT 0822, Australia.
C Australian Wildlife Conservancy, Mornington, WA 6221, Australia.
D Corresponding author. Email: jmolyneux.ecology@gmail.com
Wildlife Research 44(7) 534-545 https://doi.org/10.1071/WR17017
Submitted: 7 February 2017 Accepted: 9 August 2017 Published: 16 November 2017
Abstract
Context: Accurate surveying and monitoring of biodiversity provides essential baseline data for developing and implementing effective environmental management strategies. Land managers in arid zones face the challenge of managing vast, remote landscapes that support numerous cryptic species that are difficult to detect and monitor. Although researchers and land managers are using an increasingly wider variety of monitoring techniques to detect and monitor species, little is known of the relative effectiveness and comparative costs of these techniques.
Aims: The present study simultaneously assessed the efficacy of three popular monitoring techniques utilised in the spinifex sand plains of arid Australia, namely, live trapping, sign surveys and passive infrared (PIR)-camera trapping.
Methods: We explored variations in capture rates and species richness for each technique and compared initial and on-going costs of the techniques over time.
Key results: Sign surveys detected the greatest number of species and groups overall. Detectability of small mammals and reptiles, as a target group, was greater using PIR cameras, although the probability of detection by each technique varied among specific species. PIR cameras were initially the most expensive technique; however, the low ongoing costs of maintaining cameras in the field meant that they became the most cost effective after eight survey periods.
Conclusions: Each of the techniques tested here showed biases towards the detection of specific groups or species in the spinifex sand-plain habitat of Australia. Regardless, PIR cameras performed better at detecting the greatest diversity of target species and financially over time.
Implications: To accurately survey species across vast areas and climate variations, studies often extend over long time periods. Many long-term studies would be likely to benefit financially from the increased deployment of PIR cameras alongside or in place of live trapping surveys, with little impact on the ability to monitor the presence of most species in the region.
References
Alagaili, A. N., Mohammed, O. B., Bennett, N. C., and Oosthuizen, M. K. (2014). Now you see me, now you don’t: The locomotory activity rhythm of the Asian garden dormouse (Eliomys melanurus) from Saudi Arabia. Mammalian Biology 79, 195–201.| Now you see me, now you don’t: The locomotory activity rhythm of the Asian garden dormouse (Eliomys melanurus) from Saudi Arabia.Crossref | GoogleScholarGoogle Scholar |
Australian Wildlife Conservancy [AWC] (2016). ‘Annual Fauna Trapping: Newhaven Sanctuary.’ (Australian Wildlife Conservancy: Newhaven, NT.)
Baillie, J., Hilton-Taylor, C., and Stuart, S. (Eds) (2004). ‘IUCN Red List of Threatened Species. A Global Species Assessment.’ (IUCN: Gland, Switzerland.)
Barea-Azcón, J. M., Virgós, E., Ballesteros-Duperón, E., Moleón, M., and Chirosa, M. (2007). Surveying carnivores at large spatial scales: a comparison of four broad-applied methods. Biodiversity and Conservation 16, 1213–1230.
| Surveying carnivores at large spatial scales: a comparison of four broad-applied methods.Crossref | GoogleScholarGoogle Scholar |
Bennison, K., Clayton, J., Godfree, R., Pavey, C., and Wilson, M. (2014). Surfacing behaviour and ecology of the marsupial mole (Notoryctes typhlops) at Uluru–Kata Tjuta National Park. Australian Mammalogy 36, 184–188.
Benshemesh, J. (2014). Backfilled tunnels provide a novel and efficient method of revealing an elusive Australian burrowing mammal. Journal of Mammalogy 95, 1054–1063.
| Backfilled tunnels provide a novel and efficient method of revealing an elusive Australian burrowing mammal.Crossref | GoogleScholarGoogle Scholar |
Boitani, L., and Fuller, T. K. (Eds) (2000). ‘Research Techniques in Animal Ecology: Controversies and Consequences.’ (Columbia University Press: New York.)
Burnham, K. P., and Anderson, D. R. (2002) ‘Model Selection and Multimodel Inference: a Practical Information-theoretic Approach.’ (Springer: New York.)
Burton, A. C., Neilson, E., Moreira, D., Ladle, A., Steenweg, R., Fisher, J. T., Bayne, E., and Boutin, S. (2015). Wildlife camera trapping: a review and recommendations for linking surveys to ecological processes. Journal of Applied Ecology 52, 675–685.
| Wildlife camera trapping: a review and recommendations for linking surveys to ecological processes.Crossref | GoogleScholarGoogle Scholar |
Catling, P. C., Burt, R. J., and Kooyman, R. (1997). A comparison of techniques used in a survey of the ground-dwelling and arboreal mammals in forests in north-eastern New South Wales. Wildlife Research 24, 417–432.
| A comparison of techniques used in a survey of the ground-dwelling and arboreal mammals in forests in north-eastern New South Wales.Crossref | GoogleScholarGoogle Scholar |
Charles Darwin University [CDU] (2014). ‘Salaries Guide. Office of Human Resources Services.’ (Charles Darwin University: Darwin.)
Davies, M. J., and Drew, A. (2014). Monitoring of small mammal populations in the Brindabella Ranges after fire. Australian Mammalogy 36, 103–107.
| Monitoring of small mammal populations in the Brindabella Ranges after fire.Crossref | GoogleScholarGoogle Scholar |
De Bondi, N., White, J. G., Stevens, M., and Cooke, R. (2010). A comparison of the effectiveness of camera trapping and live trapping for sampling terrestrial small-mammal communities. Wildlife Research 37, 456–465.
| A comparison of the effectiveness of camera trapping and live trapping for sampling terrestrial small-mammal communities.Crossref | GoogleScholarGoogle Scholar |
Department of National Parks Sport and Racing (2016) ‘Camping Fees.’ Available at www.nprsr.qld.gov.au/experienced/camping/camping_fees.html [verified 3 February 2015].
Dickman, C., Mahon, P., Masters, P., and Gibson, D. (1999). Long-term dynamics of rodent populations in arid Australia: the influence of rainfall. Wildlife Research 26, 389–403.
| Long-term dynamics of rodent populations in arid Australia: the influence of rainfall.Crossref | GoogleScholarGoogle Scholar |
Dickman, C., Haythornthwaite, A., McNaught, G., Mahon, P., Tamayo, B., and Letnic, M. (2001). Population dynamics of three species of dasyurid marsupials in arid central Australia: a 10-year study. Wildlife Research 28, 493–506.
| Population dynamics of three species of dasyurid marsupials in arid central Australia: a 10-year study.Crossref | GoogleScholarGoogle Scholar |
Dickman, C., Greenville, A., Beh, C., Tamayo, B., and Wardle, G. (2010). Social organization and movements of desert rodents during population ‘booms’ and ‘busts’ in central Australia. Journal of Mammalogy 91, 798–810.
| Social organization and movements of desert rodents during population ‘booms’ and ‘busts’ in central Australia.Crossref | GoogleScholarGoogle Scholar |
Dickman, C., Greenville, A., Tamayo, B., and Wardle, G. (2011). Spatial dynamics of small mammals in central Australian desert habitats: the role of drought refugia. Journal of Mammalogy 92, 1193–1209.
| Spatial dynamics of small mammals in central Australian desert habitats: the role of drought refugia.Crossref | GoogleScholarGoogle Scholar |
Fairfax, R. J., Dowling, R. M., and Neldner, V. J. (2014). The use of infrared sensors and digital cameras for documenting visitor use patterns: a case study from D’Aguilar National Park, south-east Queensland, Australia. Current Issues in Tourism 17, 72–83.
| The use of infrared sensors and digital cameras for documenting visitor use patterns: a case study from D’Aguilar National Park, south-east Queensland, Australia.Crossref | GoogleScholarGoogle Scholar |
Fancourt, B. A. (2014). Rapid decline in detections of the Tasmanian bettong (Bettongia gaimardi) following local incursion of feral cats (Felis catus). Australian Mammalogy 36, 247–253.
| Rapid decline in detections of the Tasmanian bettong (Bettongia gaimardi) following local incursion of feral cats (Felis catus).Crossref | GoogleScholarGoogle Scholar |
Fiske, I., and Chandler, R. (2011). Unmarked: an R package for fitting hierarchical models of wildlife occurance and abundance. Journal of Statistical Software 43, 1–23.
| Unmarked: an R package for fitting hierarchical models of wildlife occurance and abundance.Crossref | GoogleScholarGoogle Scholar |
Garden, J. G., McAlpine, C. A., Possingham, H. P., and Jones, D. N. (2007). Using multiple survey methods to detect terrestrial reptiles and mammals: what are the most successful and cost-efficient combinations? Wildlife Research 34, 218–227.
| Using multiple survey methods to detect terrestrial reptiles and mammals: what are the most successful and cost-efficient combinations?Crossref | GoogleScholarGoogle Scholar |
Glen, A. S., Cockburn, S., Nichols, M., Ekanayake, J., and Warburton, B. (2013). Optimising camera traps for monitoring small mammals. PLoS One 8, e67940.
| Optimising camera traps for monitoring small mammals.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXhtFaku7bN&md5=ce6b0b82e185cf9395db492bcb16ab6fCAS |
Greenville, A. C., Wardle, G. M., and Dickman, C. R. (2012). Extreme climatic events drive mammal irruptions: regression analysis of 100-year trends in desert rainfall and temperature. Ecology and Evolution 2, 2645–2658.
| Extreme climatic events drive mammal irruptions: regression analysis of 100-year trends in desert rainfall and temperature.Crossref | GoogleScholarGoogle Scholar |
Greenville, A. C., Wardle, G. M., and Dickman, C. R. (2013). Extreme rainfall events predict irruptions of rat plagues in central Australia. Austral Ecology 38, 754–764.
| Extreme rainfall events predict irruptions of rat plagues in central Australia.Crossref | GoogleScholarGoogle Scholar |
Greenville, A. C., Wardle, G. M., Tamayo, B., and Dickman, C. R. (2014). Bottom-up and top-down processes interact to modify intraguild interactions in resource-pulse environments. Oecologia 175, 1349–1358.
| Bottom-up and top-down processes interact to modify intraguild interactions in resource-pulse environments.Crossref | GoogleScholarGoogle Scholar |
Halls Creek Travel & Tourism (2016) ‘Accommodation in East Kimberley.’ Available at www.hallscreektourism.com.au/accommodation [verified 3 February 2015].
Hamel, S., Killengreen, S. T., Henden, J.-A., Eide, N. E., Roed-Eriksen, L., Ims, R. A., and Yoccoz, N. G. (2013). Towards good practice guidance in using camera-traps in ecology: influence of sampling design on validity of ecological inferences. Methods in Ecology and Evolution 4, 105–113.
| Towards good practice guidance in using camera-traps in ecology: influence of sampling design on validity of ecological inferences.Crossref | GoogleScholarGoogle Scholar |
Heck, K. L., van Belle, G., and Simberloff, D. (1975). Explicit calculation of the rarefaction diversity measurement and the determination of sufficient sample size. Ecology 56, 1459–1461.
| Explicit calculation of the rarefaction diversity measurement and the determination of sufficient sample size.Crossref | GoogleScholarGoogle Scholar |
Hothorn, T., Bretz, F., and Westfall, P. (2008). Simultaneous inference in general parametric models. Biometrical Journal. Biometrische Zeitschrift 50, 346–363.
| Simultaneous inference in general parametric models.Crossref | GoogleScholarGoogle Scholar |
Hui, C., McGeoch, M. A., Reyers, B., le Roux, P. C., Greve, M., and Chown, S. L. (2009). Extrapolating population size from the occupancy–abundance relationship and the scaling pattern of occupancy. Ecological Applications 19, 2038–2048.
| Extrapolating population size from the occupancy–abundance relationship and the scaling pattern of occupancy.Crossref | GoogleScholarGoogle Scholar |
Jones, C., McShea, W. J., Conroy, M. J., and Kunz, T. H. (1996). Capturing mammals. In ‘Measuring and Monitoring Bological Diversity: Standard Methods for Mammals’. (Eds D. E. Wilson, F. R. Cole, J. D. Nichols, R. Rudran and M. S. Foster.) pp. 115–156 (Smithsonian Institution Press: Washington, DC.)
Karanth, K. U., Gopalaswamy, A. M., Kumar, N. S., Vaidyanathan, S., Nichols, J. D., and MacKenzie, D. I. (2011). Monitoring carnivore populations at the landscape scale: occupancy modelling of tigers from sign surveys. Journal of Applied Ecology 48, 1048–1056.
| Monitoring carnivore populations at the landscape scale: occupancy modelling of tigers from sign surveys.Crossref | GoogleScholarGoogle Scholar |
Kays, R., Kranstauber, B., Jansen, P., Carbone, C., Rowcliffe, M., Fountain, T., and Tilak, S. (2009). Camera traps as sensor networks for monitoring animal communities. In ‘Local Computer Networks,2009’. pp. 811–818. (IEEE: Zurich, Switzerland)
Kendall, K. C., Metzgar, L. H., Patterson, D. A., and Steele, B. M. (1992). Power of sign surveys to monitor population trends. Ecological Applications 2, 422–430.
| Power of sign surveys to monitor population trends.Crossref | GoogleScholarGoogle Scholar |
Letnic, M., Story, P., Story, G., Field, J., Brown, O., and Dickman, C. R. (2011). Resource pulses, switching trophic control, and the dynamics of small mammal assemblages in arid Australia. Journal of Mammalogy 92, 1210–1222.
| Resource pulses, switching trophic control, and the dynamics of small mammal assemblages in arid Australia.Crossref | GoogleScholarGoogle Scholar |
Lyra-Jorge, M., Ciocheti, G., Pivello, V., and Meirelles, S. (2008). Comparing methods for sampling large and medium sized mammals: camera traps and track plots. European Journal of Wildlife Research 54, 739–744.
| Comparing methods for sampling large and medium sized mammals: camera traps and track plots.Crossref | GoogleScholarGoogle Scholar |
MacKenzie, D. I., Nichols, J. D., Hines, J. E., Knutson, M. G., and Franklin, A. B. (2003). Estimating site occupancy, colonization, and local extinction when a species is detected imperfectly. Ecology 84, 2200–2207.
| Estimating site occupancy, colonization, and local extinction when a species is detected imperfectly.Crossref | GoogleScholarGoogle Scholar |
MacKenzie, D. I., Nichols, J. D., Royle, J. A., Pollock, K. H., Bailey, L. L., and Hines, J. E. (2006). ‘Occupancy Estimation and Modeling: Inferring Patterns and Dynamics of Species Occurrence.’ (Elsevier/Academic Press: Burlington, MA.)
Masters, P. (1993). The effects of fire driven succession and rainfall on small mammals in spinifex grassland at Uluru National Park, Northern Territory. Wildlife Research 20, 803–813.
| The effects of fire driven succession and rainfall on small mammals in spinifex grassland at Uluru National Park, Northern Territory.Crossref | GoogleScholarGoogle Scholar |
Masters, P. (1996). The effects of fire-driven succession on reptiles in spinifex grasslands at Uluru National Park, Northern Territory. Wildlife Research 23, 39–48.
| The effects of fire-driven succession on reptiles in spinifex grasslands at Uluru National Park, Northern Territory.Crossref | GoogleScholarGoogle Scholar |
Masters, P. (1998). The mulgara Dasycercus cristicauda (Marsupialia: Dasyuridae) at Uluru National Park, Northern Territory. Australian Mammalogy 20, 403–407.
Masters, P., and Dickman, C. R. (2012). Population dynamics of Dasycercus blythi (Marsupialia: Dasyuridae) in central Australia: how does the mulgara persist? Wildlife Research 39, 419–428.
| Population dynamics of Dasycercus blythi (Marsupialia: Dasyuridae) in central Australia: how does the mulgara persist?Crossref | GoogleScholarGoogle Scholar |
McAlpin, S., Duckett, P., and Stow, A. (2011). Lizards cooperatively tunnel to construct a long-term home for family members. PLoS One 6, e19041.
| Lizards cooperatively tunnel to construct a long-term home for family members.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXmt1ejt74%3D&md5=b6edf8fe041c1b8af9713d5f006bbbeeCAS |
McCallum, J. (2013). Changing use of camera traps in mammalian field research: habitats, taxa and study types. Mammal Review 43, 196–206.
| Changing use of camera traps in mammalian field research: habitats, taxa and study types.Crossref | GoogleScholarGoogle Scholar |
McGrath, T., Hunter, D. M., Osborne, W., and Sarre, S. (2012). A trial use of camera traps detects the highly cryptic and endangered grassland earless dragon Tympanocryptis pinguicolla (Reptilia: Agamidae) on the Monaro Tablelands of New South Wales, Australia. Herpetological Review 43, 249–252.
Meek, P. D., Fleming, P. J. S., Bllard, G., Banks, P., Claridge, A. W., Sanderson, J., and Swann, D. (Eds) (2014). ‘Camera Trapping: Wildlife Management and Research.’ (CSIRO Publishing: Melbourne.)
Milstead, W. B., Meserve, P. L., Campanella, A., Previtali, M. A., Kelt, D. A., and Gutiérrez, J. R. (2007). Spatial ecology of small mammals in north-central Chile: role of precipitation and refuges. Journal of Mammalogy 88, 1532–1538.
| Spatial ecology of small mammals in north-central Chile: role of precipitation and refuges.Crossref | GoogleScholarGoogle Scholar |
Molyneux, J. (2017). ‘Fauna Assemblages of the Spinifex Sand Plains in Central Australia: Responses to Climate, Fire and Predation.’ (Research Institute for the Environment and Livelihoods, Charles Darwin University: Darwin.)
Moseby, K. E., Nano, T., and Southgate, R. (2009). ‘Tales in the Sand: a Guide to Identifying Arid Zone Fauna using Spoor and Other Sign.’ (Ecological Horizons: Kimba, SA.)
National Health and Medical Research Council (2015). ‘A Guide to the Care and use of Australian Native Mammals in Research and Teaching.’ (National Health and Medical Research Council: Canberra.)
Nichols, J. D., and Pollock, K. H. (1983). Estimation methodology in contemparary small mammal capture–recapture studies. Journal of Mammalogy 64, 253–260.
| Estimation methodology in contemparary small mammal capture–recapture studies.Crossref | GoogleScholarGoogle Scholar |
Noss, A. J., Gardner, B., Maffei, L., Cuellar, E., Montano, R., Romero-Munoz, A., Sollman, R., and O’Connell, A. F. (2012). Comparison of density estimation methods for mammal populations with camera traps in the Kaa-Iya del Gran Chaco landscape. Animal Conservation 15, 527–535.
| Comparison of density estimation methods for mammal populations with camera traps in the Kaa-Iya del Gran Chaco landscape.Crossref | GoogleScholarGoogle Scholar |
Oksanen, J., and Blanchet, F. G. (2015). ‘vegan: Community Ecology Package.’ Available athttp://CRAN.R-project.org/package=vegan [verified 10 March 2015].
Paull, D. J., Claridge, A. W., and Barry, S. C. (2011). There’s no accounting for taste: bait attractants and infrared digital cameras for detecting small to medium ground-dwelling mammals. Wildlife Research 38, 188–195.
| There’s no accounting for taste: bait attractants and infrared digital cameras for detecting small to medium ground-dwelling mammals.Crossref | GoogleScholarGoogle Scholar |
Pavey, C. R., Eldridge, S. R., and Heywood, M. (2008). Population dynamics and prey selection of native and introduced predators during a rodent outbreak in arid Australia. Journal of Mammalogy 89, 674–683.
| Population dynamics and prey selection of native and introduced predators during a rodent outbreak in arid Australia.Crossref | GoogleScholarGoogle Scholar |
Pavey, C. R., Nano, C. E. M., Cooper, S. J. B., Cole, J. R., and McDonald, P. J. (2011). Habitat use, population dynamics and species identification of mulgara, Dasycercus blythi and D. cristicauda, in a zone of sympatry in central Australia. Australian Journal of Zoology 59, 156–169.
| Habitat use, population dynamics and species identification of mulgara, Dasycercus blythi and D. cristicauda, in a zone of sympatry in central Australia.Crossref | GoogleScholarGoogle Scholar |
Perry, R. A., and Goodall, D. W. (Eds) (1979). ‘Arid Land Ecosystems: Structure, Functioning, and Management.’ International Biological Programme. (Cambridge University Press: New York.)
Pianka, E. R. (1969). Sympatry of desert lizards (Ctenotus) in Western Australia. Ecology 50, 1012–1030.
| Sympatry of desert lizards (Ctenotus) in Western Australia.Crossref | GoogleScholarGoogle Scholar |
Price-Rees, S. J., Brown, G. P., and Shine, R. (2013). Spatial ecology of blue-tongue lizards (Tiliqua spp.) in the Australian wet–dry tropics. Austral Ecology 38, 493–503.
| Spatial ecology of blue-tongue lizards (Tiliqua spp.) in the Australian wet–dry tropics.Crossref | GoogleScholarGoogle Scholar |
R Core Team (2015). ‘R: a Language and Environment for Statistical Computing.’ (R Foundation for Statistical Computing: Vienna.) Available at http://www.R-project.org/ [verified 8 March 2015].
Scott, D. M., Brown, D., Mahood, S., Denton, B., Silburn, A., and Rakotondraparany, F. (2006). The impacts of forest clearance on lizard, small mammal and bird communities in the arid spiny forest, southern Madagascar. Biological Conservation 127, 72–87.
| The impacts of forest clearance on lizard, small mammal and bird communities in the arid spiny forest, southern Madagascar.Crossref | GoogleScholarGoogle Scholar |
Scroggie, M. P., and Clemann, N. (2009). Handling-related tail loss in an endangered skink: incidence, correlates and a possible solution. Journal of Zoology 277, 214–220.
| Handling-related tail loss in an endangered skink: incidence, correlates and a possible solution.Crossref | GoogleScholarGoogle Scholar |
Silveira, L., Jacomo, A. T. A., and Diniz, J. A. F. (2003). Camera trap, line transect census and track surveys: a comparative evaluation. Biological Conservation 114, 351–355.
| Camera trap, line transect census and track surveys: a comparative evaluation.Crossref | GoogleScholarGoogle Scholar |
Bolker, B., H. Skaug, D. Fournier, A. Nielsen, and A. Magnusson. 2012. ‘glmmADMB: generalized linear mixed models using AD model builder.’(R Foundation for Statistical Computing, Vienna, Austria). Available at http://R-Forge.R-project.org/projects/glmmadmb/ [verified 30 October 2017].
Stafford Smith, M. S., and McAllister, R. R. J. (2008). Managing arid zone natural resources in Australia for spatial and temporal variability: an approach from first principles. The Rangeland Journal 30, 15–27.
| Managing arid zone natural resources in Australia for spatial and temporal variability: an approach from first principles.Crossref | GoogleScholarGoogle Scholar |
Southgate, R., Paltridge, R., Masters, P., and Nano, T. (2005). An evaluation of transect, plot and aerial survey techniques to monitor the spatial pattern and status of the bilby (Macrotis lagotis) in the Tanami Desert. Wildlife Research 32, 43–52.
| An evaluation of transect, plot and aerial survey techniques to monitor the spatial pattern and status of the bilby (Macrotis lagotis) in the Tanami Desert.Crossref | GoogleScholarGoogle Scholar |
Southwood, T. R. E., and Henderson, P. A. (2000) ‘Ecological Methods.’ (Blackwell Science: Oxford, UK.)
Stanley, T. R., and Royle, J. A. (2005). Estimating site occupancy and abundance using indirect detection indices. The Journal of Wildlife Management 69, 874–883.
| Estimating site occupancy and abundance using indirect detection indices.Crossref | GoogleScholarGoogle Scholar |
Stewart, A. (1979). Trapping success in relation to trap placement with three species of small mammals, Rattus fuscipes, Antechinus swainsonii and A.stuartii. Wildlife Research 6, 165–172.
| Trapping success in relation to trap placement with three species of small mammals, Rattus fuscipes, Antechinus swainsonii and A.stuartii.Crossref | GoogleScholarGoogle Scholar |
Sun, C. C., Fuller, A. K., and Royle, J. A. (2014). Trap configuration and spacing influences parameter estimates in spatial capture–recapture models. PLoS One 9, e88025.
| Trap configuration and spacing influences parameter estimates in spatial capture–recapture models.Crossref | GoogleScholarGoogle Scholar |
Thompson, G. G., and Thompson, S. A. (2007). Usefulness of funnel traps in catching small reptiles and mammals, with comments on the effectiveness of the alternatives. Wildlife Research 34, 491–497.
| Usefulness of funnel traps in catching small reptiles and mammals, with comments on the effectiveness of the alternatives.Crossref | GoogleScholarGoogle Scholar |
Thrifty Car Rentals (2016) ‘Car Hire.’ Available at http://www.thrifty.com.au [verified 3 February 2015].
Watson, M. (2007). ‘A Survey of Southern Marsupial Moles Notoryctes typhlops and Plains Rats Psudomys australis in the Western Simpson Desert and Witjira National Park, South Australia, May 2007.’ SA Arid Lands NRM Board & Friends of Simpson Desert. (SA Arid Lands NRM Board: Port Augusta, SA.)
Webb, N. F., and Merrill, E. H. (2012). Simulating carnivore movements: an occupancy-abundance relationship for surveying wolves. Wildlife Society Bulletin 36, 240–247.
| Simulating carnivore movements: an occupancy-abundance relationship for surveying wolves.Crossref | GoogleScholarGoogle Scholar |
Welbourne, D. J., MacGregor, C., Paull, D., and Lindenmayer, D. B. (2015). The effectiveness and cost of camera traps for surveying small reptiles and critical weight range mammals: a comparison with labour-intensive complementary methods. Wildlife Research 42, 414–425.
| The effectiveness and cost of camera traps for surveying small reptiles and critical weight range mammals: a comparison with labour-intensive complementary methods.Crossref | GoogleScholarGoogle Scholar |
Wiewel, A. S., Clark, W. R., and Sovada, M. A. (2007). Assessing small mammal abundance with track-tube indices and mark–recapture population estimates. Journal of Mammalogy 88, 250–260.
| Assessing small mammal abundance with track-tube indices and mark–recapture population estimates.Crossref | GoogleScholarGoogle Scholar |
Zuur, A., Ieno, E. N., Walker, N., Saveliev, A. A., and Smith, G. M. (2009). ‘Mixed Effects Models and Extensions in Ecology with R.’ (Springer: New York.)
Zuur, A. F., Saveliev, A. A., and Ieno, E. N. (2012). ‘Zero Inflated Models and Generalized Linear Mixed Models with R.’ (Highland Statistics: Newburgh, UK.)
