Omari Gates
European rabbits (Oryctolagus cuniculus) were introduced to Australia in the 18th century and became widespread, causing millions of dollars' worth of damage to crops. Various methods have been used to control the Australian rabbit population, including shooting rabbits, destroying their warrens, fencing, and introducing diseases. While some of these methods have had success in controlling the rabbit population, the rabbits have also developed resistance to some of the measures, such as the myxoma virus and calicivirus. The Australian government and researchers continue to work on finding effective solutions to control the rabbit population and mitigate its impact on the environment and economy.
| Characteristics | Values |
|---|---|
| Introduction of rabbits in Australia | 18th century, 1700s |
| Who introduced them | Thomas Austin |
| Number of rabbits introduced | 13 |
| Year | 1859 |
| Place | Winchelsea, Barwon Park, Victoria |
| Reason | Hunting purposes |
| Population in 1866 | 50,000 |
| Population in 1867 | Out of control |
| Population in 1940s | 600 million |
| Current population | 200 million |
| Economic impact | $197 million |
| Control methods | Shooting, destroying warrens, poisoning, fencing, releasing rabbit-borne diseases |
| Fencing | Rabbit-proof fence, Number 1 Rabbit-Proof Fence |
| Area covered by fencing | Between Cape Keraudren and Esperance |
| Length of fencing | Hundreds of kilometres |
| Diseases released | Myxoma virus, Rabbit Hemorrhagic Disease Virus (RHDV), calicivirus |
| Bacteria | Pasteurella bacteria |
Explore related products
Rabbit-proof fencing
European rabbits (Oryctolagus cuniculus) were first introduced to Australia in the 18th century and later became widespread. Rabbits are one of Australia's most serious pest animals and invasive species, causing millions of dollars' worth of damage to crops and the environment. Various methods have been attempted to control the Australian rabbit population in the 20th century, including conventional methods such as shooting rabbits, destroying their warrens, poisoning, fumigation, and trapping.
One of the most notable attempts to control the rabbit population in Australia was the construction of the rabbit-proof fence in Western Australia from 1901 to 1907. The fence was built between Cape Keraudren and Esperance, aiming to prevent the spread of rabbits from the east into Western Australian pastoral areas. However, the fence failed to achieve its intended purpose due to the rabbits' ability to jump high and burrow underground, as well as the constant deterioration of the fence, allowing rabbits to cross through.
Despite the failure of the large-scale fence, smaller-scale fencing projects continued to be implemented with some success. Fencing became an integral component of the settlers' efforts to control the rabbit population in the late 19th century, with the first extensive fences built in central New South Wales. The initial success of private fencing encouraged state governments to construct longer fences.
In addition to fencing, biological controls have also played a significant role in rabbit population management. The myxoma virus, introduced in the 1950s, initially reduced the rabbit population by up to 90%. However, rabbits eventually developed resistance to the virus, rendering it less effective over time. Other viruses such as rabbit haemorrhagic disease virus (RHDV) and calicivirus have also been used, but rabbits have started to develop resistance to these as well.
The introduction of diseases has proven to be somewhat successful in controlling rabbit populations in Australia. However, due to the rabbits' ability to develop resistance, continuous efforts are required to find new solutions and control measures.
Animal Stak: Banned in Australia?
You may want to see also
Explore related products
Poisoning
An early method of poisoning involved laying baits of pollard laced with a phosphorus-based poison. The advantage of phosphorus is that in dry weather, it soon degrades to innocuous phosphoric acid and presents no further danger to livestock or pets. However, it does present a real fire risk, and concentrated fumes can be toxic to operators.
More modern poisons for rabbit control include sodium fluoroacetate ("1080"), which has a very high mortality rate (more than 90%), and pindone. Rabbit poisoning with 1080 in NSW is regulated by the Pesticides Act 1999 and can only be carried out under the conditions set down in the Pesticide Control (1080 Bait Products) Order 2019 (1080 PCO). Poisoning with 1080 is a cost-effective method to reduce medium and high-density rabbit numbers to a manageable level. To conduct a 1080 poisoning program, one must contact their Local Land Services. All 1080 users must have chemical risk management training at Australian Qualifications Framework level 3 (AQF3).
Carbon monoxide and phosphine are also used to fumigate rabbit burrows and kill any rabbits living inside. Fumigation involves filling warrens with gas that is heavier than air. All burrow entrances must be closed to prevent the escape of rabbits.
Australian XL Pants Sizing: A Guide to Perfect Fit
You may want to see also
Explore related products
Fumigation
Another fumigant used is carbon monoxide, which is released during pressure fumigation. This method involves pressurising the warren with carbon monoxide gas, which penetrates deep into the burrow system, killing the rabbits inside. Pressure fumigation is a highly effective method for controlling rabbit populations, but it requires specialised equipment and trained personnel to ensure safety.
While fumigation is effective, it should be noted that it is not a standalone solution. Rabbits are resilient and adaptable, and they can recover quickly if left unchecked. Therefore, persistent and vigilant monitoring, as well as coordinated efforts with neighbours, are essential to effectively control rabbit populations and protect Australia's agriculture, environment, and economy from the impacts of these invasive pests.
Australia Bans Engineered Stone: Health Risks and Awareness
You may want to see also
Rabbit warren ripping
Ripping is best suited to large-scale operations and is most effective when rabbit numbers are already low, such as after a baiting program, drought, or disease outbreak, or when rabbits are not usually breeding. It is also more humane when rabbit numbers are low and when powerful machinery is used to achieve complete disintegration of the warren, so that the rabbits are killed quickly. Ripping is most commonly carried out using a tractor or bulldozer fitted with single or multiple-tined rippers. The tines are often 1-metre-long and are dragged over the warrens or burrows, dismembering or burying any rabbits inside. In areas where warrens are difficult to access or the use of large machinery is not appropriate, alternative methods such as explosives or manual destruction with a shovel may be necessary.
The type of soil is an important consideration when ripping warrens. In sandy soils, ripping should be carried out when the soil is dry so that the collapse is more complete, and the soil will flow into the deeper tunnels. With heavier clay soils, it is best to rip when they are slightly damp to avoid creating large lumps of soil that create pockets where rabbits can survive.
Blackmores: Australian-Made Supplements, Vitamins and Health Products
You may want to see also
Biological control
The introduction of European rabbits (Oryctolagus cuniculus) to Australia in the 18th century has had a devastating impact on the country's environment and agriculture. Various methods have been employed to control the rabbit population, including biological controls such as viruses and bacteria.
One of the earliest attempts at biological control was made by Jean Danysz of the Pasteur Institute of Paris, who, in 1906 and 1907, conducted trials on Broughton Island, New South Wales, using a strain of Pasteurella bacteria specific to rabbits. However, this method proved unsatisfactory, and financial support for further trials was lacking.
Subsequently, the myxoma virus, which causes myxomatosis, was introduced to the rabbit population in the 1950s and initially succeeded in reducing their numbers by more than 90%. However, over time, rabbits developed a resistance to myxomatosis, rendering it ineffective.
Another rabbit-specific pathogen, the Rabbit Hemorrhagic Disease Virus (RHDV), was discovered in the 1980s and accidentally released from a quarantine facility in 1995. RHDV is transmitted by flies and can kill rabbits within 48 hours. After its official release in 1996, RHDV reduced rabbit numbers in Australia by up to 90% in dry areas.
Despite the initial success of RHDV, rabbits have since begun to develop resistance to this virus as well. Experts are now studying more deadly strains of RHDV to combat the rising rabbit population, which continues to cause significant environmental and economic damage to Australia.
In addition to these viruses, poisons have also been used as a biological control measure. Sodium fluoroacetate, carbon monoxide, and phosphine are some of the toxins employed to fumigate rabbit burrows and bait rabbits. While poisoning is widely used due to its effectiveness and ease of application, it requires constant vigilance to mitigate risks to non-target species.
Applying for OBA Australia: A Comprehensive Guide
You may want to see also
Frequently asked questions
Rabbits have been estimated to have an annual economic impact of approximately $197 million dollars nationally. They cause damage to crops and pastures, leading to reduced crop yields and biodiversity. They also compete with livestock for food and shelter, increasing grazing pressure.
Various methods have been attempted to control the Australian rabbit population, including shooting rabbits, destroying their warrens, poisoning, and fencing. In the 1950s, the myxoma virus was introduced, which was initially successful but the rabbits eventually developed a resistance. Other viruses such as RHDV have also been used to control the population.
European rabbits were introduced to Australia in the 18th century and became widespread due to their lack of natural predators and ability to breed quickly. They can birth more than four litters a year with up to five kits each.
