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Australian Mammalogy Australian Mammalogy Society
Journal of the Australian Mammal Society
RESEARCH ARTICLE

Testing the decline of the New Holland mouse (Pseudomys novaehollandiae) in Victoria

Phoebe A. Burns https://orcid.org/0000-0003-1015-3775
+ Author Affiliations
- Author Affiliations

School of BioSciences, University of Melbourne, Parkville, Vic. 3010, Australia and Sciences Department, Museums Victoria, GPO Box 666, Melbourne, Vic. 3052, Australia. Email: phoebe.burns@live.com

Australian Mammalogy 42(2) 185-193 https://doi.org/10.1071/AM19006
Submitted: 23 January 2019  Accepted: 21 July 2019   Published: 10 September 2019

Abstract

Many Australian rodent species have become extinct or undergone substantial range contractions since European invasion. Limited and haphazard survey efforts across much of Australia mean we are unsure of many species’ current and former ranges, hampering our ability to identify and remedy causes of decline. The New Holland Mouse (NHM; Pseudomys novaehollandiae) is an endangered rodent species native to south-east Australia that is suspected of undergoing rapid and dramatic range contractions and local extinctions in recent decades. Here, I reassess the species’ distribution across Victoria using extensive survey efforts and, subsequently, provide a summation of potential key threatening processes. In only 40 years, the NHM has been lost from seven of the 12 isolated areas where it once occurred in Victoria. Habitat loss and fragmentation, invasive predators, and potentially disease and genetic inbreeding have likely contributed to the species’ rapid and continuing decline. Conservation priorities include ongoing monitoring and research, cat and fox control, exclusion of rabbit poison-baiting, targeted fire and habitat management, and reintroduction to historically occupied regions where threatening processes have been mitigated.

Additional keywords: camera trap, detectability, distributional decline, Muridae, resurvey, threatened species.


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