Moo-ving boundaries and virtual fencing

Virtual fences remotely map and control livestock such as cows by fitting the animal with a GPS collar which delivers audio cues and electric pulses to the animal if they approach a pre-set boundary.

CDU associate professor Beth Penrose says the technology will be invaluable to northern beef producers who oversee millions of hectares of land in environments prone to fire and flooding.

Beth says virtual fences won’t just boost farmers productivity but will also benefit the environment.

“One of the main types of landscape we want to protect is riparian areas – areas around water,” she says.

“The watercourses often flood during the wet season and then recede, so if you wanted to fence the watercourse with a normal fence, this would wash away and you would need to replace it, which takes a lot of time and money.

“Permanently fencing off watercourses could make the riparian areas fire corridors, whereas virtual fencing allows native herbivores such as kangaroos to keep eating the vegetation to keep the fuel load low.”

Virtual fences are heavily relied upon in southern states, where calves are separated from cows earlier, but northern beef producers typically operate using cow-calf systems, keeping the pair together much longer.

CDU professor Sunil Kadri says the collars used in virtual fence technology are not considered suitable for calves, which poses a unique challenge for Territory farmers.

“We don’t know whether the calves will respect the virtual fence, whether mothers will ignore the fence if their calves are on the other side of it, and what the implications of this are for welfare and behaviour,” Sunil says.

“It is important we develop an understanding of the implications of using virtual fences in northern rangelands, for the behaviour and welfare of calves and cows, as well the potential for using the technology across a number of applications within this environment.”