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Ecology, management and conservation in natural and modified habitats
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RESEARCH ARTICLE
Contents Vol 34(6)

Effects of drought on weight, survival and breeding success of agile antechinus (Antechinus agilis), dusky antechinus (A. swainsonii) and bush rats (Rattus fuscipes)

Marissa L. Parrott A D , Simon J. Ward A B , Peter D. Temple-Smith A C and Lynne Selwood A
+ Author Affiliations
- Author Affiliations

A Department of Zoology, University of Melbourne, Parkville, Vic. 3010, Australia.

B Present address: Biodiversity Conservation Division, NT Department of Natural Resources, Environment and the Arts, PO Box 496, Palmerston, NT 0810, Australia.

C Present address: Centre of Reproduction and Development, Monash Institute of Medical Research, 27–31 Wright Street, Clayton, Vic. 3168, Australia.

D Corresponding author. Email: marissa@unimelb.edu.au

Wildlife Research 34(6) 437-442 https://doi.org/10.1071/WR07071
Submitted: 22 June 2007  Accepted: 21 September 2007   Published: 2 November 2007

Abstract

Extreme weather conditions, such as drought, significantly decrease the survival and breeding success of numerous species. Despite the frequent occurrence of such conditions in Australia, little is known about the effects of changing environmental conditions on the native small mammals. This study, conducted from 2002 to 2004, focussed on sympatric wild populations of the agile antechinus (Antechinus agilis), with more limited information on the dusky antechinus (A. swainsonii) and the bush rat (Rattus fuscipes). Bodyweights of agile antechinus before and during the breeding season were significantly lower in 2003 (drought) than in 2002 or 2004. Survival of female agile antechinus and the number of young per litter also decreased significantly during drought. In contrast, the dusky antechinus showed no difference in mean bodyweights between years, high survival rates of females and similar litter sizes in 2002 and 2003. There was also no difference in bodyweight of bush rats between years. Low rainfall was recorded during pregnancy and lactation in the agile antechinus, but rainfall was higher during pregnancy and lactation in the dusky antechinus. The survival and breeding success of the agile antechinus may have been adversely affected by a combination of interspecific competition, timing of the breeding season and severity of the drought.


Acknowledgements

This research was generously funded by grants from the Holsworth Wildlife Research Endowment and the Winifred Violet Scott Estate, a Loftus-Hills Memorial Fund Award and a David Hay Postgraduate Writing-up Award to M. Parrott. We thank Femmie Kraaijeveld-Smit for her assistance and access to her field data and two anonymous referees for their comments on our manuscript. This research was carried out with ethics approval from the Animal Ethics Sub-Committee at the University of Melbourne and under a Department of Sustainability and Environment Wildlife permit.


References

Banks, P. B. , and Dickman, C. R. (2000). Effects of winter food supplementation on reproduction, body mass, and numbers of small mammals in montane Australia. Canadian Journal of Zoology 78, 1775–1783.
| Crossref | GoogleScholarGoogle Scholar | Braithwaite R. W. (1973). An ecological study of Antechinus stuartii (Marsupialia: Dasyuridae). M.Sc. Thesis, University of Queensland, Brisbane.

Braithwaite, R. W. , and Lee, A. K. (1979). A mammalian example of semelparity. American Naturalist 113, 151–155.
| Crossref | GoogleScholarGoogle Scholar | Cockburn A., and Johnson C. N. (1988). Patterns of growth. In ‘The Developing Marsupial: Models for Medical Research’. (Eds C. H. Tyndale-Biscoe and P. A. Janssens.) pp. 28–40. (Springer-Verslag: Berlin.)

Cockburn, A. , Scott, M. P. , and Scotts, D. J. (1985). Inbreeding avoidance and male-biased natal dispersion in Antechinus spp. (Marsupialia: Dasyuridae). Animal Behaviour 33, 908–915.
| Crossref | GoogleScholarGoogle Scholar | Dickman C. R. (1998a). Agile antechinus, Antechinus sp. In ‘The Mammals of Australia’. (Ed. R. Strahan.) pp. 99–101. (New Holland Publishers: Sydney.)

Dickman C. R. (1998b). Dusky antechinus, Antechinus swainsonii. In ‘The Mammals of Australia’. (Ed. R. Strahan.) pp. 97–99. (New Holland Publishers: Sydney.)

Fisher, D. O. , Blomberg, S. P. , and Hoyle, S. D. (2001). Mechanisms of drought-induced population decline in an endangered wallaby. Biological Conservation 102, 107–115.
| Crossref | GoogleScholarGoogle Scholar | Hall S., and Lee A. K. (1982). Habitat use by two species of Antechinus and Rattus fuscipes in tall open forest in southern Victoria. In ‘Carnivorous Marsupials’. (Ed. M. Archer.) pp. 209–220. (Royal Zoological Society of New South Wales: Australia.)

Irby, D. C. , Kerr, J. B. , Risbridger, G. P. , and De Kreser, D. M. (1984). Seasonally and experimentally induced changes in testicular function of the Australian bush rat Rattus fuscipes. Journal of Reproduction and Fertility 70, 657–666.
| PubMed | Lunney D. (1998). Bush rat, Rattus fuscipes. In ‘The Mammals of Australia’. (Ed. R. Strahan.) pp. 651–653. (New Holland Publishers: Sydney.)

Lunney, D. , Cullis, B. , and Eby, P. (1987). Effects of logging and fire on small mammals in Mumbulla State Forest, near Bega, New South Wales. Australian Wildlife Research 14, 163–181.
| Crossref | GoogleScholarGoogle Scholar | Menkhorst P., and Knight F. (2001). ‘A Field Guide to the Mammals of Australia.’ pp. 54–56. (Oxford University Press: Melbourne.)

Renecker L. A., and Hudson R. J. (1993). Bioenergetics and resource use. In ‘Hoofed Mammals of Alberta’. (Ed. J. B. Stelfox.) (Lone Pine Press: Edmonton.)

Rhind, S. G. (2002). Reproductive demographics among brush-tailed phascogales (Phascogale tapoatafa) in south-western Australia. Australian Wildlife Research 29, 247–257.
| Crossref | GoogleScholarGoogle Scholar | Selwood L. (1982). Brown antechinus, Antechinus stuartii: management of breeding colonies to obtain embryonic material and pouch young. In ‘The Management of Australian Mammals in Captivity’. (Ed. D. D. Evans.) pp. 31–36. (Zoological Board of Victoria: Melbourne.)

Selwood, L. (1983). Factors influencing pre-natal fertility in the brown marsupial mouse, Antechinus stuartii. Journal of Reproduction and Fertility 68, 317–324.
| PubMed | SYSTAT (2004). ‘SYSTAT for Windows. Statistics. Version 11.’ (SYSTAT: Illinois.)

Taylor, J. M. , and Horner, B. E. (1973). Reproductive characteristics of wild native Australian Rattus (Rodentia: Muridae). Australian Journal of Zoology 21, 437–475.
| Crossref | GoogleScholarGoogle Scholar | PubMed | Warneke R. M. (1971). Field study of the bush rat (Rattus fuscipes). Wildlife contributions, Victoria, 14. Fisheries and Wildlife Department, Victoria, Australia.

Williams R., and Williams A. (1982). The life cycle of Antechinus swainsonii (Dasyuridae, Marsupialia). In ‘Carnivorous Marsupials’. (Ed. M. Archer.) pp. 89–95. (Royal Zoological Society of New South Wales: Sydney.)

Woolley, P. A. (1966). Reproduction in Antechinus spp., and other dasyurid marsupials. Symposium of the Zoological Society of London 15, 281–294.