March 2010

Encounters

Shane Maloney and Chris Grosz

600 Million Rabbits & Myxomatosis

Words: Shane Maloney | Illustration: Chris Grosz

Rabbits are poor conservers of energy. They can’t adapt to drought. Their diet is not diverse. All in all, they are not well suited to the Australian environment. But when it comes to reproduction they can’t be bettered. Mating takes 30 seconds, courtship included. In a single year, one doe can generate as many as 100 rapid-rooting offspring.

By 1950, the number of rabbits in Australia had reached 600 million. They devoured pastures and crops, ringbarked trees and spread erosion with their burrows. Shooting, poisoning, blasting, gassing, trapping, fencing, using ferrets or foxes and turning them into hats had all failed to make the slightest impact on their Malthusian multiplication.

Biological weapons were tested and failed. In 1888, Louis Pasteur sent a team from Paris armed with chicken cholera. It didn’t work. Myxomatosis, a pox from South America, was proposed in 1919. The government rejected the idea on the grounds that it “wouldn’t work”.

Eventually, the CSIRO decided to give it a shot. In May 1950, a myxo-infected bunny was released at Gunbar in the Riverina. Through the winter, members of the wild- life research section tracked the progress of the virus. In August, they returned to Canberra “despondent, cold and wet”. The disease worked in the warrens where it was introduced, but it didn’t appear to spread.

Three weeks later, a case was reported in Corowa, more than 200 kilometres from Gunbar. By summer, it was in Queensland, spreading so fast the scientists couldn’t keep up. The initial mortality rate was 99.5%. The smell of rotting flesh was everywhere in the bush. Within a year the rabbit population had dropped to 100 million.

The virus was spread by mosquitoes. So, too, was Murray Valley encephalitis, a virus potentially fatal to humans. It was a wet year, 1950, and there were a lot of mozzies. When people started dying, the CSIRO was blamed. To allay public concern, Australia’s most prominent scientists, Dr McFarlane Burnet, Prof. Frank Fenner and Dr Ian Clunies Ross, had themselves injected with myxoma.

Within five years, the small number of resistant and immune rabbits had become a large number of resistant and immune rabbits. The “accidental” release of calicivirus in 1995 again reduced Australia’s rabbit population but the impact eventually began to wear off.

The Foundation for Rabbit-Free Australia promotes the Easter Bilby as an alternative to the Easter Bunny. Also known as the rabbit-eared bandicoot, the bilby is a marsupial omnivore known to eat baby rabbits. CSIRO scientists also invented Aerogard and Softly.

Shane Maloney and Chris Grosz

Shane Maloney is a writer and the author of the award-winning Murray Whelan series of crime novels. His 'Encounters', illustrated by Chris Grosz, have been published in a collection, Australian Encounters.

Chris Grosz is a book illustrator, painter and political cartoonist. He has illustrated newspapers and magazines such as the Age, the Bulletin and Time.

Cover: March 2010

March 2010

From the front page

Image of protest against police violence in Minneapolis, Minnesota on May 26, 2020

Black Lives Matter

Australia should draw lessons from the riots in the US

Image of Australians queuing at Centrelink in Brisbane.

Moral bankruptcy

Robodebt stemmed from the false ideological division between the deserving and undeserving poor, but the government still clings to moralistic language

Illustration by Jeff Fisher

The last word on George Pell

The royal commission’s damning verdict on what Pell knew about child sexual abuse in the Church

Image of Prime Minister Scott Morrison

Robo-dead

The PM imposed an illegal ‘debt’ collection scheme on Australia’s most vulnerable


In This Issue

Illustration by Jeff Fisher.

Good Neighbours

Illustration by Jeff Fisher.

Close at hand

‘Important Artifacts and Personal Property from the Collection of Lenore Doolan and Harold Morris, Including Books, Street Fashion and Jewelry’ by Leanne Shapton

Illustration by Jeff Fisher.

Ghost writers


More in Encounters

Words: Shane Maloney | Illustration: Chris Grosz

Rupert Murdoch & Kamahl

Mark Oliphant & J Robert Oppenheimer

John Monash & King George V

John Howard & Uri Geller


Read on

Image of Australians queuing at Centrelink in Brisbane.

Moral bankruptcy

Robodebt stemmed from the false ideological division between the deserving and undeserving poor, but the government still clings to moralistic language

Image of Gough Whitlam in October 1975

It’s about time

The High Court’s landmark ruling on the ‘Palace Papers’ is a win for Australian social democracy

Image of Robyn Davidson

Something mythic

For Robyn Davidson, her acclaimed memoir ‘Tracks’ was an act of freedom whose reception hemmed her in

COVID-19 versus human rights

The virus is the latest excuse for governments to slash and burn the individual rights of prisoners


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