PhD student Billy Ross is using motion-sensing camera traps to establish baseline data on the number of northern quolls and feral cats in the Pilbara to
determine whether cat-baiting can prevent the threatened mammals’ extinction.
“Feral cats are devastating our native wildlife – they are killing millions of individuals of many wildlife species and have been implicated in a number of extinctions and declines across the continent,” says Mr Ross.
“Since their arrival alongside European settlement, they have dispersed across more than 98 per cent of the country. We need to implement broad-scale cat control initiatives to prevent further declines and to assist the recovery of those threatened species currently on the brink.”
Mr Ross is monitoring populations of the endangered northern quoll in the Pilbara, one of the last quoll habitats to remain free of cane toads – another invasive species with a devastating impact on quoll numbers. He is also measuring feral cat densities and recording the interactions between feral cats and quolls.
“Over the next three years I will investigate the impact of the Eradicat baiting program on feral cat densities and spatial ecology; the nature of interactions between cats and quolls in the Pilbara; and the ecological responses of quolls to reduced numbers of feral cats.”
The Pilbara cat-baiting program is managed by the West Australian Department of Parks and Wildlife, a TSR Hub partner, as part of a Threatened Species Offset Plan supported by Rio Tinto. The department assumes responsibility for baiting, assessing bait uptake and quoll monitoring – with the research undertaken by Mr Ross designed to complement and augment the program’s activities.
His research forms part of the TSR Hub’s Project 1.1, which aims to develop management tools to reduce the impact of feral species on threatened mammals. The project is led by Professor John Woinarski and Dr Sarah Legge.
Despite occasionally running into difficulties with impenetrable spinifex and the often-searing heat of the Pilbara, Mr Ross still manages to appreciate the beauty of his surroundings.
“I consider myself fortunate to spend so much time among the mighty mesas (hills) and gorgeous gorges of my field sites.”
Mr Ross will continue his research for the next three years – collecting and analysing data with the intention of optimising future baiting programs.
Image: Setting a trap by Billy Ross
New Hub research has quantified the extent of predation by cats on Australia’s birds and identified the species and types of birds most vulnerable to cats. The team found that cats kill over 1 million birds per day in Australia. The total is made up of an estimated 316 million birds killed by feral cats and 61 million killed by pet cats each year.
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As cats and foxes have spread across Australia, islands have prevented the extinctions of several mammals like the boodie. Associate Professor Sarah Legge discusses the importance of safe havens and also summarizes the highlights of a recent 'safe-haven' symposium held at the International Mammalogy Congress in Perth.
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