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

Habitat use by platypus (Ornithorhynchus anatinus) in a modified Australian Wet Tropics catchment, north-eastern Queensland

Michael Milione A B C and Elaine Harding B
+ Author Affiliations
- Author Affiliations

A School of Earth and Environmental Sciences, James Cook University, Cairns, Qld 4870, Australia.

B School of Marine and Tropical Biology, James Cook University, Angus Smith Drive, Townsville, Qld 4814, Australia.

C Corresponding author. Email: michael.milione@jcu.edu.au

Australian Mammalogy 31(1) 35-46 https://doi.org/10.1071/AM08110
Submitted: 24 July 2008  Accepted: 24 February 2009   Published: 16 April 2009

Abstract

The habitat affiliations of platypus (Ornithorhynchus anatinus) were investigated in the upper Barron River and its tributaries, a modified Wet Tropics catchment in north-eastern Queensland, Australia. A habitat assessment was carried out at 46 sites, and a visual monitoring survey was used to determine whether platypus were present at these sites. Habitat assessment of riparian and in-stream parameters included an evaluation of factors known to influence platypus populations: disturbance level, stream depth and width, riparian continuity, the amount of overhanging vegetation, bare soil along banks, large woody debris, weeds, pool and riffle area and substrate types. Sites where platypus sightings occurred were characterised by a minimum channel width of 3.8 m and slow-flowing pools with depths of 0.49–2.0 m. These findings concur with platypus habitat preferences as described in other regions, although some in-stream and riparian factors considered as important components of platypus habitat in other studies (riparian continuity, large woody debris, undercut banks and coarse stream substrate) were not associated with the presence of platypus in this study. This study represents the first investigation of the influence of human-induced habitat modification on platypus affiliations in an Australian Wet Tropics river system.

Additional keywords: habitat disturbance, habitat preference, visual monitoring.


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Appendix 1.  Forty-six sites included in platypus visual monitoring survey conducted at the upper Barron River, May–August 2003
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Appendix 2.  Index of disturbance rating for riparian assessment
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