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Article     |     Next >>   Contents Vol 40(8)

Aerially deployed baits in the northern rangelands of Western Australia are available to wild dogs

Malcolm S. Kennedy A B , Ken Rose A and Gary Martin A

A Department of Agriculture and Food, Western Australia, Forrestfield, WA 6056, Australia.
B Corresponding author. Email: malcolm.kennedy@agric.wa.gov.au

Wildlife Research 40(8) 633-638 http://dx.doi.org/10.1071/WR13169
Submitted: 10 October 2013  Accepted: 20 February 2014   Published: 18 March 2014


 
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Abstract

Context: Aerial baiting using fixed-wing aircraft is an effective method of bait delivery for wild-dog control in remote locations. However, aerial baiting may result in loss of baits to positions that are inaccessible to wild dogs. Attempts, by landholders, to address such bait loss through compensatory baiting may increase baiting costs and potential risks to non-target species.

Aims: To assess bait drift under standard baiting conditions. To assess the availability of aerially deployed baits to wild dogs across several commonly baited landforms in the northern rangelands of Western Australia.

Methods: We determined drift characteristics of baits deployed under standard fixed-wing baiting conditions. We then determined the availability of aerially deployed baits by deploying baits with embedded radio-transmitters across four commonly baited landforms (riparian vegetation, tussock grassland, gorges and breakaways). We then visually assessed the availability of relocated baits (as ‘high’, ‘moderate’ or ‘low’).

Key results: Under standard fixed-wing baiting conditions, on average, baits fell 100.9 m forward, and 8.3 m laterally, from the point-of-release. Across all landforms, most baits (91.8%) were highly available, with a further 7.0% falling into the moderate category and 1.2% in the low category. There were significant differences in bait availability among landforms, with the proportion of moderate-low availability baits greatest in gorges and lowest on tussock grassland.

Conclusions: Within the northern rangelands of Western Australia, bait wastage owing to deployment in inaccessible locations is minimal.

Implications: Compensatory baiting for lost baits is unnecessary and increases costs to land managers.



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