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Wildlife Research Wildlife Research Society
Ecology, management and conservation in natural and modified habitats
RESEARCH ARTICLE

Dietary strategy of the swamp antechinus (Antechinus minimus maritimus) (Marsupialia : Dasyuridae) in coastal and inland heathland habitats

Louise M. Allison A B , Lesley A. Gibson A C D and John G. Aberton A
+ Author Affiliations
- Author Affiliations

A School of Ecology and Environment, Deakin University, Geelong, Vic. 3217, Australia.

B Present address: Earth Tech, 71 Queens Road, Melbourne, Vic. 3001, Australia.

C Present address: Department of Conservation and Land Management, Wildlife Research Centre, PO Box 51, Wanneroo, WA 6946, Australia.

D Corresponding author. Email: lesleyg@calm.wa.gov.au

Wildlife Research 33(1) 67-76 https://doi.org/10.1071/WR05038
Submitted: 18 April 2005  Accepted: 25 November 2005   Published: 7 March 2006

Abstract

In the coastal heathlands of southern Victoria, populations of a rare dasyurid, the swamp antechinus (Antechinus minimus maritimus), are restricted to small and disjunct patches of suitable habitat. Although characteristics of their preferred habitat in terms of vegetation structure and composition have been described, little is known of their diet preferences. Diet and food availability of the species was examined at two coastal and two inland sites, during winter and spring by way of faecal analyses and pitfall trapping. Only minor differences in diet were observed between the coastal and inland habitats and this was consistent across season. There was, however, variation in food availability between the two habitat types, with generally higher frequencies of invertebrates occurring within the inland than in the coastal habitat during spring. Even so, when diet was directly compared with food availability, the differences observed within individual categories within each season were similar in magnitude and direction for both habitats, suggesting that inland and coastal populations of the swamp antechinus have similar dietary strategies. Insect larvae, Diplopoda and Coleoptera appeared to be favoured dietary items being almost consistently over-represented in the diet compared to their availability, whereas Collembola, Amphipoda, Dermaptera and Formicidae were avoided as they were never consumed in proportion to their availability. Although dietary preferences were evident, there was no clear selection of any one particular prey item, and so the swamp antechinus was considered a dietary generalist. Also, as the species sampled from most of the range of prey items available to them, it fits the qualitative criterion of opportunism. The generalist strategy of the swamp antechinus is likely to be advantageous in an environment subject to disturbance.


Acknowledgments

We are grateful to Susie Schickman for laboratory assistance. The study was partially funded by the Field Naturalist Club of Victoria. The research was conducted under a Department of Sustainability and Environment Scientific Permit and with ethics approval from Deakin University Animal Ethics Committee.


References

Aberton J. G. (1996). Succession of small mammal communities after fire and reintroduction of the swamp antechinus Antechinus minimus. Ph.D. Thesis, Deakin University, Geelong.

Allison L. M. (2003). Diet and prey availability of the swamp antechinus Antechinus minimus maritimus (Marsupialia: Dasyuridae). B.Sc.(Honours) Thesis, Deakin University, Geelong.

Bennett, A. F. , and Baxter, B. J. (1989). Diet of the long-nosed potoroo, Potorous tridactylus (Marsupialia: Potoroidae), in south-western Victoria. Australian Wildlife Research 16, 263–271.
Crossref | GoogleScholarGoogle Scholar | Colwell R. K. (2004). EstimateS: statistical estimation of species richness and shared species from samples. Version 7. User’s Guide. http://purl.oclc.org/estimates.

CSIRO (1991). ‘The Insects of Australia.’ 2nd edn. (Melbourne University Press: Melbourne.)

Dickman, C. R. (1995). Diets and habitat preferences of three species of crocidurine shrews in arid southern Africa. Journal of Zoology 237, 499–514.
Dickman C. R. (2003). Distributional ecology of dasyurid marsupials. In ‘Predators with Pouches: the Biology of Carnivorous Marsupials’. (Eds M. Jones, C. Dickman and M. Archer.) pp. 318–332. (CSIRO Publishing: Melbourne.)

Dickman, C. R. , and Huang, C. (1988). The reliability of faecal analysis as a method for determining the diet of insectivorous mammals. Journal of Mammalogy 69, 108–113.
Gullan P. J., and Cranston P. S. (2000). ‘The Insects. An Outline of Entomology.’ (Blackwell Science Ltd: Melbourne.)

Gullan, P. K. , and Robinson, A. C. (1980). Vegetation and small mammals of a Victorian forest. Australian Mammalogy 3, 87–95.
Hume I. D. (1999). ‘Marsupial Nutrition.’ (Cambridge University Press: Cambridge, UK.)

Laidlaw W. S. (1997). The effects of Phytophthora cinnamomi on heathland flora and fauna of the eastern Otway Ranges. Ph.D. Thesis, Deakin University, Geelong.

Land Conservation Council (1985). Report on the Melbourne Area, District 1 Review. Land Conservation Council, Victoria, Australia.

Lechowicz, M. J. (1982). The sampling characteristics of electivity indices. Oecologia 52, 22–30.
Crossref | GoogleScholarGoogle Scholar | Lee A. K., Woolley P., and Braithwaite R. W. (1982). Life history strategies of dasyurid marsupials. In ‘Carnivorous Marsupials’. (Ed. M. Archer.) pp. 1–11. (Royal Zoological Society of New South Wales: Sydney.)

Luff, M. L. (1975). Some features influencing the efficiency of pitfall traps. Oecologia 19, 345–357.
McMahon K., and Brighton M. (2002). Anglesea Heath Management Plan, November 2002. Parks Victoria and Alcoa World Alumina Australia, Melbourne.

Moro, D. (1991). The distribution of small mammal species in relation to heath vegetation near Cape Otway, Victoria. Wildlife Research 18, 605–618.
Crossref | GoogleScholarGoogle Scholar | Specht R. L. (1970). Vegetation. In ‘The Australian Environment’. 4th edn. (Ed. G. W. Leeper.) (CSIRO & Melbourne University Press: Melbourne.)

S-Plus (2001). ‘S-Plus 6 for Windows Guide to Statistics. Volume 1.’ (Insightful Corporation: Seattle, WA.)

Statham H. L. (1982). Antechinus stuartii (Dasyuridae, Marsupialia) diet and food availability at Petroi, northeastern New South Wales. In ‘Carnivorous Marsupials’. (Ed. M. Archer.) pp. 151–163. (Royal Zoological Society New South Wales: Sydney.)

Vanderploeg, H. A. , and Scavia, D. (1979a). Calculation and use of selectivity coefficients of feeding: zooplankton grazing. Ecological Modelling 7, 135–149.
Crossref | GoogleScholarGoogle Scholar | Zborowski P., and Storey R. (1995). ‘A Field Guide to Insects in Australia.’ (Reed Books: Sydney.)