This paper explores the question of why the endangered Spotted-tailed Quoll Dasyurus maculatus remains abundant in parts of north-eastern New South Wales, while populations in many other areas have declined or disappeared. Based on a two-year field study of a high-density population, we discuss a number of possible explanations for this pattern. These include high availability of prey (in particular, arboreal mammals), quality and spatial extent of habitat, low density of competitors, and relatively small home range sizes of females compared to those in other areas.

We emphasise the importance of maintaining high densities of hollow-bearing trees, which probably help to support prey populations. Managers should also seek to maintain an abundance of fallen timber, which provides shelter and movement pathways for quolls.

We hypothesise that the low density of foxes in our study area, along with the large expanse of relatively undisturbed habitat, most likely explains the high abundance of D. maculatus. However, experiments are required. Fox removal experiments should be conducted as a matter of highest priority, and should seek to measure the response of quolls to the removal of foxes at least at the individual level and preferably also at the population level.

Arthur, A. D., Pech, R. P. and Dickman, C. R. 2004. Habitat structure mediates the non-lethal effects of prédation on enclosed populations of house mice. Journal of Animal Ecology 73: 867-877.
Habitat structure mediates the non-lethal effects of prédation on enclosed populations of house mice
Journal of Animal Ecology
, vol. 
73
 (pg. 
867
-
877
)
Arthur, A. D., Pech, R. P. and Dickman, C. R. 2005. Effects of predation and habitat structure on the population dynamics of house mice in large outdoor enclosures. Oikos 108: 562-572.
Effects of predation and habitat structure on the population dynamics of house mice in large outdoor enclosures
Oikos
, vol. 
108
 (pg. 
562
-
572
)
Ballard, W. B., Edwards, M., Fancy, S. G., Boe, S. and Krausman, P. R. 1998. Comparison of VHF and satellite telemetry for estimating sizes of wolf territories in northwest Alaska. Wildlife Society Bulletin 26: 823-829.
Comparison of VHF and satellite telemetry for estimating sizes of wolf territories in northwest Alaska
Wildlife Society Bulletin
, vol. 
26
 (pg. 
823
-
829
)
Belcher, C. A. 2000. Ecology of the Tiger Quoll, Dasyurus maculatus, in Southeast Australia. PhD thesis. Deakin University, Geelong.
Ecology of the Tiger Quoll, Dasyurus maculatus, in Southeast Australia
Belcher, C. A. 2004. The largest surviving marsupial carnivore on mainland Australia: the tiger or spotted-tailed quoll Dasyurus maculatus, a nationally threatened, forest-dependent species. Pp. 612-623 in Conservation of Australia's Forest Fauna (2nd edition), edited by D. Lunney. Royal Zoological Society of NSW, Mosman.
Conservation of Australia's Forest Fauna
(pg. 
612
-
623
)
Belcher, C. A. and Darrant, J. P. 2004. Home range and spatial organization of the marsupial carnivore, Dasyurus maculatus maculatus (Marsupialia: Dasyuridae) in south-eastern Australia. Journal of Zoology (London) 262: 271-280.
Home range and spatial organization of the marsupial carnivore, Dasyurus maculatus maculatus (Marsupialia: Dasyuridae) in south-eastern Australia
Journal of Zoology (London)
, vol. 
262
 (pg. 
271
-
280
)
Braithwaite, L. W., Turner, J. and Kelly, J. 1984. Studies on the arboreal marsupial fauna of eucalypt forests being harvested for wood pulp at Eden, N.S.W. III. Relationships between faunal densities, eucalypt occurrence and foliage nutrients, and soil parent materials. Wildlife Research 11: 41-48.
Studies on the arboreal marsupial fauna of eucalypt forests being harvested for wood pulp at Eden, N.S.W. III. Relationships between faunal densities, eucalypt occurrence and foliage nutrients, and soil parent materials
Wildlife Research
, vol. 
11
 (pg. 
41
-
48
)
Brown, J. S., Laundre, J. W. and Gurung, M. 1999. The ecology of fear: optimal foraging, game theory, and trophic interactions. Journal of Mammalogy 80: 385-399.
The ecology of fear: optimal foraging, game theory, and trophic interactions
Journal of Mammalogy
, vol. 
80
 (pg. 
385
-
399
)
Burbidge, N. T. 1960. The phytogeography of the Australian region. Australian Journal of Botany 8: 75-209.
The phytogeography of the Australian region
Australian Journal of Botany
, vol. 
8
 (pg. 
75
-
209
)
Burnett, S. and Marsh, H. 2004. Conservation of the spotted-tailed quoll Dasyurus maculatus: a conceptual and applied model with particular reference to populations of the endangered D. m. gracilis. Pp. 624-638 in Conservation of Australia's Forest Fauna (2nd edition), edited by D. Lunney. Royal Zoological Society of New South Wales, Mosman.
Conservation of Australia's Forest Fauna
(pg. 
624
-
638
)
Catling, P. C. 1988. Similarities and contrasts in the diets of foxes Vulpes vulpes and cats Felis catus relative to fluctuating prey populations and drought. Australian Wildlife Research 15: 307-318.
Similarities and contrasts in the diets of foxes Vulpes vulpes and cats Felis catus relative to fluctuating prey populations and drought
Australian Wildlife Research
, vol. 
15
 (pg. 
307
-
318
)
Catling, P. C. and Burt, R. J. 1995. Why are red foxes absent from some eucalypt forests in eastern New South Wales? Wildlife Research 22: 535-546.
Why are red foxes absent from some eucalypt forests in eastern New South Wales
Wildlife Research
, vol. 
22
 (pg. 
535
-
546
)
Catling, P. C., Burt, R. J. and Forrester, R. I. 2002. Models of the distribution and abundance of ground-dwelling mammals in the eucalypt forests of north-eastern New South Wales in relation to environmental variables. Wildlife Research 29: 313-322.
Models of the distribution and abundance of ground-dwelling mammals in the eucalypt forests of north-eastern New South Wales in relation to environmental variables
Wildlife Research
, vol. 
29
 (pg. 
313
-
322
)
Caughley, G. and Sinclair, A. R. E. 1994. Wildlife Management and Ecology. Blackwell Science, Cambridge.
Wildlife Management and Ecology
Caughley, J. 1980. Native quolls and tiger quolls. Pp. 45-48 in Endangered Animals of New South Wales, edited by C. Haigh. NSW National Parks and Wildlife Service, Sydney.
Endangered Animals of New South Wales
(pg. 
45
-
48
)
Claridge, A. W., Paull, D., Dawson, J., Mifsud, G., Murray, A. J., Poore, R. and Saxon, M. 2005. Home range of the spotted-tailed quoll (Dasyurus maculatus), a marsupial carnivore, in a rainshadow woodland. Wildlife Research 32: 7-14.
Home range of the spotted-tailed quoll (Dasyurus maculatus), a marsupial carnivore, in a rainshadow woodland
Wildlife Research
, vol. 
32
 (pg. 
7
-
14
)
Denny, E., Yakovlevich, P., Eldridge, M. D. B. and Dickman, C. 2002. Social and genetic analysis of a population of free-living cats (Felis catus L.) exploiting a resource-rich habitat. Wildlife Research 29: 405-413.
Social and genetic analysis of a population of free-living cats (Felis catus L.) exploiting a resource-rich habitat
Wildlife Research
, vol. 
29
 (pg. 
405
-
413
)
Dickman, C. R. 1992. Predation and habitat shift in the house mouse Mus domesticus. Ecology 73: 313-322.
Predation and habitat shift in the house mouse Mu
domesticus. Ecology
, vol. 
73
 (pg. 
313
-
322
)
Dickman, C. R. and Read, D. G. 1992. The Biology and Management of Dasyurids of the Arid Zone in New South Wales. Species Management Report No. 11. NSW National Parks and Wildlife Service, Hurstville.
The Biology and Management of Dasyurids of the Arid Zone in New South Wales. Species Management Report No. 11
Dijak, W. D. and Thompson, F. R. 2000. Landscape and edge effects on the distribution of mammalian predators in Missouri. Journal of Wildlife Management 64: 209-216.
Landscape and edge effects on the distribution of mammalian predators in Missouri
Journal of Wildlife Management
, vol. 
64
 (pg. 
209
-
216
)
Ferrier, S., Brown, D., Hines, H., Scotts, D., Griffiths, S. and Hunter, J. 2000. Introduction. Pp. 15-28 in Establishment of a Biological Information Base for Regional Conservation Planning in Northeastern New South Wales, Phase 1. (1991-1995). Occasional Paper no. 26, edited by D. Brown, H. Hines, S. Ferrier and K. McKay. New South Wales National Parks and Wildlife Service, Sydney.
Establishment of a Biological Information Base for Regional Conservation Planning in Northeastern New South Wales, Phase 1. (1991-1995). Occasional Paper no. 26
(pg. 
15
-
28
)
Ferrier, S., Watson, G., Pearce, J. and Drielsma, M. 2002. Extended statistical approaches to modelling spatial pattern in biodiversity in northeast New South Wales. I. Species-level modelling. Biodiversity and Conservation 11: 2275-2307.
Extended statistical approaches to modelling spatial pattern in biodiversity in northeast New South Wales. I. Species-level modelling
Biodiversity and Conservation
, vol. 
11
 (pg. 
2275
-
2307
)
Frair, J. L., Nielsen, S. E., Merrill, E. H., Lele, S. R., Boyce, M. S., Munro, R. H. M., Stenhouse, G. B. and Beyer, H. L. 2004. Removing GPS collar bias in habitat selection studies. Journal of Applied Ecology 41: 201-212.
Removing GPS collar bias in habitat selection studies
Journal of Applied Ecology
, vol. 
41
 (pg. 
201
-
212
)
Glen, A. S. 2005. Ecology of the spotted-tailed quoll (Dasyurus maculatus), and its interactions with eutherian predators. PhD thesis. University of Sydney, Sydney.
Ecology of the spotted-tailed quoll (Dasyurus maculatus), and its interactions with eutherian predators
Glen, A. S. 2008. Population attributes of the spotted-tailed quoll (Dasyurus maculatus) in north-eastern New South Wales. Australian Journal of Zoology 56: 137-142.
Population attributes of the spotted-tailed quoll (Dasyurus maculatus) in north-eastern New South Wales
Australian Journal of Zoology
, vol. 
56
 (pg. 
137
-
142
)
Glen, A. S. and Dickman, C. R. 2005. Complex interactions among mammalian carnivores in Australia, and their implications for wildlife management. Biological Reviews 80: 387-401.
Complex interactions among mammalian carnivores in Australia, and their implications for wildlife management
Biological Reviews
, vol. 
80
 (pg. 
387
-
401
)
Glen, A. S. and Dickman, C. R. 2006a. Diet of the spotted-tailed quoll Dasyurus maculatus in eastern Australia: effects of season, sex and size. Journal of Zoology (London) 269: 241-248.
Diet of the spotted-tailed quoll Dasyurus maculatus in eastern Australia: effects of season, sex and size
Journal of Zoology (London)
, vol. 
269
 (pg. 
241
-
248
)
Glen, A. S. and Dickman, C. R. 2006b. Home range, denning behaviour and microhabitat use of the carnivorous marsupial Dasyurus maculatus in eastern Australia. Journal of Zoology (London) 268: 347-354.
Home range, denning behaviour and microhabitat use of the carnivorous marsupial Dasyurus maculatus in eastern Australia
Journal of Zoology (London)
, vol. 
268
 (pg. 
347
-
354
)
Glen, A. S. and Dickman, C. R. 2008. Niche overlap between marsupial and eutherian carnivores: does competition threaten the endangered spotted-tailed quoll? Journal of Applied Ecology 45: 700-707.
Niche overlap between marsupial and eutherian carnivores: does competition threaten the endangered spotted-tailed quoll
Journal of Applied Ecology
, vol. 
45
 (pg. 
700
-
707
)
Glen, A. S., Dickman, C. R., Soulé, M. E. and Mackey, B. G. 2007a. Evaluating the role of the dingo as a trophic regulator in Australian ecosystems. Austral Ecology 32: 492-501.
Evaluating the role of the dingo as a trophic regulator in Australian ecosystems
Austral Ecology
, vol. 
32
 (pg. 
492
-
501
)
Glen, A. S., Gentle, M. N. and Dickman, C. R. 2007b. Non-target impacts of poison baiting for predator control in Australia. Mammal Review 37: 191-205.
Non-target impacts of poison baiting for predator control in Australia
Mammal Review
, vol. 
37
 (pg. 
191
-
205
)
Harris, L. D. 1988. Edge effects and conservation of biotic diversity. Conservation Biology 2: 330-332.
Edge effects and conservation of biotic diversity
Conservation Biology
, vol. 
2
 (pg. 
330
-
332
)
Hik, D. S. 1995. Does risk of predation influence population dynamics? Evidence from cyclic decline of snowshoe hares. Wildlife Research 22: 115-129.
Does risk of predation influence population dynamics? Evidence from cyclic decline of snowshoe hares
Wildlife Research
, vol. 
22
 (pg. 
115
-
129
)
Hobbs, R. J. 2005. Landscapes, ecology and wildlife management in highly modified environments - an Australian perspective. Wildlife Research 32: 389-398.
Landscapes, ecology and wildlife management in highly modified environments - an Australian perspective
Wildlife Research
, vol. 
32
 (pg. 
389
-
398
)
IFOA 1999. Integrated Forestry Operations Approval for Upper North East Region. NSW Government, Sydney.
Integrated Forestry Operations Approval for Upper North East Region
Johnson, C. N., Isaac, J. L. and Fisher, D. O. 2007. Rarity of a top predator triggers continent-wide collapse of mammal prey: dingoes and marsupials in Australia. Proceedings of the Royal Society of London - Series B: Biological Sciences 274: 341-346.
Rarity of a top predator triggers continent-wide collapse of mammal prey: dingoes and marsupials in Australia
Proceedings of the Royal Society of London - Series B: Biological Sciences
, vol. 
274
 (pg. 
341
-
346
)
Jones, E. and Coman, B. J. 1981. Ecology of the feral cat, Felis catus (L.), in south-eastern Australia I. Diet. Australian Wildlife Research 8: 537-547.
Ecology of the feral cat, Felis catus (L.), in south-eastern Australia I. Diet
Australian Wildlife Research
, vol. 
8
 (pg. 
537
-
547
)
Jones, M. E. and Barmuta, L. A. 2000. Niche differentiation among sympatric Australian dasyurid carnivores. Journal of Mammalogy 81: 434-447.
Niche differentiation among sympatric Australian dasyurid carnivores
Journal of Mammalogy
, vol. 
81
 (pg. 
434
-
447
)
Jones, M. E., Rose, R. K. and Burnett, S. 2001. Dasyurus maculatus. Mammalian Species 676: 1-9.
Dasyurus maculatus. Mammalian Species
, vol. 
676
 (pg. 
1
-
9
)
Kavanagh, R. P. 1988. The impact of predation by the powerful owl Ninox strenua on a population of the greater glider Petauroides volans. Australian Journal of Ecology 13: 445-450.
The impact of predation by the powerful owl Ninox strenua on a population of the greater glide
Petauroides volans. Australian Journal of Ecology
, vol. 
13
 (pg. 
445
-
450
)
KÖrtner, G., Gresser, S. and Harden, B. 2003. Does fox baiting threaten the spotted-tailed quoll, Dasyurus maculatus? Wildlife Research 30: 111-118.
Does fox baiting threaten the spotted-tailed quoll
Dasyurus maculatus? Wildlife Research
, vol. 
30
 (pg. 
111
-
118
)
KÖrtner, G., Gresser, S., Mott, B., Tamayo, B., Pisanu, P., Bayne, P. and Harden, R. 2004. Population structure, turnover and movement of spotted-tailed quolls on the New England Tablelands. Wildlife Research 31: 475-484.
Population structure, turnover and movement of spotted-tailed quolls on the New England Tablelands
Wildlife Research
, vol. 
31
 (pg. 
475
-
484
)
Le Souef, A. S. and Burrell, H. 1926. The Wild Animals of Australasia. Harrap, Sydney.
The Wild Animals of Australasia
Lewis, J. S., Rachlow, J. L., Garton, E. O. and Vierling, L. A. 2007. Effects of habitat on GPS collar performance: using data screening to reduce location error. Journal of Applied Ecology 44: 663-671.
Effects of habitat on GPS collar performance: using data screening to reduce location error
Journal of Applied Ecology
, vol. 
44
 (pg. 
663
-
671
)
Long, K. I. and Nelson, J. L. 2004. Recovery Plan for Dasyurus maculatus (Spotted-tailed Quoll) 2005 - 2009. Department of the Environment and Heritage, Canberra.
Recovery Plan for Dasyurus maculatus (Spotted-tailed Quoll) 2005 - 2009
Lunney, D. and Leary, T. 1988. The impact on native mammals of land-use changes and exotic species in the Bega District, New South Wales, since settlement. Australian Journal of Ecology 13: 67-92.
The impact on native mammals of land-use changes and exotic species in the Bega District, New South Wales, since settlement
Australian Journal of Ecology
, vol. 
13
 (pg. 
67
-
92
)
Mansergh, I. 1983. The status, distribution and abundance of Dasyurus maculatus (Tiger Quoll) in Australia, with particular reference to Victoria. Australian Zoologist 21: 109-122.
The status, distribution and abundance of Dasyurus maculatus (Tiger Quoll) in Australia, with particular reference to Victoria
Australian Zoologist
, vol. 
21
 (pg. 
109
-
122
)
Maxwell, S., Burbidge, A. A. and Morris, K. 1996. The 1996 Action Plan for Australian Marsupials and Monotremes. Wildlife Australia, Canberra.
The 1996 Action Plan for Australian Marsupials and Monotremes
McIlroy, J. C. 1982. The sensitivity of Australian animals to 1080 poison III. Marsupial and eutherian herbivores. Australian Wildlife Research 9: 487-503.
The sensitivity of Australian animals to 1080 poison III. Marsupial and eutherian herbivores
Australian Wildlife Research
, vol. 
9
 (pg. 
487
-
503
)
Meek, P. D. and Saunders, G. 2000. Home range and movement of foxes (Vulpes vulpes) in coastal New South Wales, Australia. Wildlife Research 27: 663-668.
Home range and movement of foxes (Vulpes vulpes) in coastal New South Wales, Australia
Wildlife Research
, vol. 
27
 (pg. 
663
-
668
)
Molsher, R., Newsome, A. and Dickman, C. 1999. Feeding ecology and population dynamics of the feral cat (Felis catus) in relation to the availability of prey in central-eastern New South Wales. Wildlife Research 26: 593-607.
Feeding ecology and population dynamics of the feral cat (Felis catus) in relation to the availability of prey in central-eastern New South Wales
Wildlife Research
, vol. 
26
 (pg. 
593
-
607
)
Morris, K., Johnson, B., Orell, P., Gaikhorst, G., Wayne, A. and Moro, D. 2003. Recovery of the threatened chuditch (Dasyurus geoffroii): a case study. Pp. 435-451 in Predators With Pouches: the Biology of Carnivorous Marsupials, edited by M. Jones, C. Dickman and M. Archer. CSIRO Publishing, Collingwood.
Predators With Pouches: the Biology of Carnivorous Marsupials
(pg. 
435
-
451
)
Morris, K. D. 2000. The value of granite outcrops for mammal conservation in Western Australia. Journal of the Royal Society of Western Australia 83: 169-172.
The value of granite outcrops for mammal conservation in Western Australia
Journal of the Royal Society of Western Australia
, vol. 
83
 (pg. 
169
-
172
)
Oakwood, M. 1997. The Ecology of the Northern Quoll. PhD thesis. Australian National University, Canberra.
The Ecology of the Northern Quoll
Oakwood, M. 2002. Spatial and social organization of a carnivorous marsupial Dasyurus hallucatus (Marsupialia: Dasyuridae). Journal of Zoology (London) 257: 237-248.
Spatial and social organization of a carnivorous marsupial Dasyurus hallucatus (Marsupialia: Dasyuridae)
Journal of Zoology (London)
, vol. 
257
 (pg. 
237
-
248
)
Palomares, F. and Caro, T. M. 1999. Interspecific killing among mammalian carnivores. American Naturalist 153: 492-508.
Interspecific killing among mammalian carnivores
American Naturalist
, vol. 
153
 (pg. 
492
-
508
)
Pressey, R. L., Ferrier, S., Hager, T. C., Woods, C. A., Tully, S. L. and Weinman, K. M. 1996. How well protected are the forests of north-eastern New South Wales? - Analyses of forest environments in relation to formal protection measures, land tenure, and vulnerability to clearing. Forest Ecology and Management 85: 311-333.
How well protected are the forests of north-eastern New South Wales? - Analyses of forest environments in relation to formal protection measures, land tenure, and vulnerability to clearing
Forest Ecology and Management
, vol. 
85
 (pg. 
311
-
333
)
Saunders, G., Coman, B., Kinnear, J. and Braysher, M. 1995. Managing Vertebrate Pests: Foxes. Australian Government Publishing Service, Canberra.
Managing Vertebrate Pests: Foxes
Settle, G. A. 1978. The quiddity of tiger quolls. Australian Natural History 19: 164-169.
The quiddity of tiger quolls
Australian Natural History
, vol. 
19
 (pg. 
164
-
169
)
Sirtrack 2005. Product details - proximity logger. Available at: http://www.sirtrack.com/product_details.asp?Prod_ID=33
Soulé, M. E. 1980. Thresholds for survival: maintaining fitness and evolutionary potential. Pp. 151-170 in Conservation Biology: An Evolutionary-Ecological Perspective, edited by M. E. Soulé and B.A. Wilcox. Sinauer Associates, Sunderland.
Conservation Biology: An Evolutionary-Ecological Perspective
(pg. 
151
-
170
)
Soulé, M. E. 1985. What is conservation biology? BioScience 35: 727-734.
What is conservation biology
BioScience
, vol. 
35
 (pg. 
727
-
734
)
Soulé, M. E., Mackey, B. G., Recher, H. F., Williams, J. E., Woinarski, J. C. Z., Driscoll, D., Dennison, W. C. and Jones, M. E. 2004. The role of connectivity in Australian conservation. Pacific Conservation Biology 10: 266-279.
The role of connectivity in Australian conservation
Pacific Conservation Biology
, vol. 
10
 (pg. 
266
-
279
)
Vazquez, D. P., Melian, C. J., Wiliams, N. M., Blüthgen, N., Krasnov, B. R. and Poulin, R. 2007. Species abundance and asymmetric interaction strength in ecological networks. Oikos 116: 1120-1127.
Species abundance and asymmetric interaction strength in ecological networks
Oikos
, vol. 
116
 (pg. 
1120
-
1127
)
Williams, J. 2001. Hollow-bearing trees in the public forests of northern New South Wales; abundance and distribution now and in the future. P 14 in Proceedings of the 14th Australasian Wildlife Management Society Conference. NPWS, Dubbo.
Proceedings of the 14th Australasian Wildlife Management Society Conference
pg. 
14
 
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