Canids potentially threaten bilbies at Astrebla Downs National Park
John Augusteyn A E , Maree Rich B , Georgeanna Story C and Barry Nolan D
+ Author Affiliations
- Author Affiliations
A Queensland Parks and Wildlife Service and Partnerships, PO Box 3130, Red Hill, Qld 4701, Australia.
B Queensland Parks and Wildlife Service and Partnerships, PO Box 202, Longreach, Qld 4730, Australia.
C Scat About Ecological, PO Box 45, Majors Creek, NSW 2622, Australia.
D Queensland Parks and Wildlife Service and Partnerships, PO Box 5332, Airlie Beach, Qld 4802, Australia.
E Corresponding author. Email: john.augusteyn@des.qld.gov.au
Australian Mammalogy 43(3) 300-310 https://doi.org/10.1071/AM20034
Submitted: 21 April 2020 Accepted: 14 August 2020 Published: 10 September 2020
Journal Compilation © Australian Mammal Society 2021 Open Access CC BY NC ND
Abstract
The ecological role of canids in arid Australia is unresolved. Some argue they play a role regulating populations of herbivores and introduced mesopredators such as feral cats (Felis catus) and foxes (Vulpes vulpes). However, evidence also suggests they pose a threat to native species populations. The aims of this study were to determine the extent of canid predation on the bilby population at Astrebla Downs National Park, Queensland, to improve our understanding of the ecological role that canids serve in the park and to determine whether seasonal changes in the canid diet can be used to predict if and when management should intervene. Canid scats (n = 723) were collected over seven years and their content examined. The percentage of bilby remains in the canid scats varied from 13 to 85% (mean = 43%) and was 20–100% by volume. In total, 23 vertebrate species were identified in canid scats. The percentage of cat remains was 0–44% (mean = 11%), peaking in 2013 during a cat plague and coinciding with canids actively hunting cats. Fox remains were not detected in dog scats. These results indicate that canids had a varied diet and at times threatened the bilby population at Astrebla.
Additional keywords: bilby, canids, dietary analysis, Macrotis lagotis, predation, scat analysis, threatened species, wild dogs.
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