08/04/2022
Looks like this year will be ideal conditions for rabbits breeding, calcivirus may not be as effective as usual.
As stated below, land owners have an obligation to control rabbits populations on their property/s as they are classified as a Declared Pest.
If you want them gone, give us a call, or message the page, we'll come out, have a look and discuss some options.
IMPORTANT UPDATE – CALICIVIRUS (RHDV1-K5)
Landowners have primary responsibility for managing rabbits on their land and Biosecurity Tasmania provides advice on rabbit control and regulates the release of calicivirus.
As a consequence of the ongoing good growing conditions, 2022 is proving to be another challenging year for rabbit control.
There is currently an abundance of food available, especially green grass, resulting in ideal conditions for rabbits to breed, and meaning they are less likely to take calicivirus treated bait. Young rabbits (up to 12 weeks) may develop immunity from calicivirus if exposed. Release of calicivirus in the presence of large number of young rabbits therefore increases the risk of developing calicivirus immunity within rabbit populations.
Release principles include:
- When food is in abundance, especially green grass, rabbits are less likely to take calicivirus-treated bait as the grass will be preferred.
- Releasing calicivirus when there are large numbers of young rabbits will lead to calicivirus immunity developing in rabbit populations.
- Air temperature must be suitable for very good insect transmission of the virus.
Because of the current environmental conditions, calicivirus has not been released this year to date. However, officers will continue to assess areas for suitability.
There were no releases of calicivirus in Tasmania during 2021.
Pet owners are reminded that strains of calicivirus and other viruses such as myxoma, are always present in the environment. There are reports of some wild rabbit populations currently being impacted by myxomatosis and RHDV2 (a strain of calicivirus that has naturalised in the environment).
Rabbit owners should talk with their vet about protection against these viruses and maintain measures to limit infection (see: https://nre.tas.gov.au/invasive-species/invasive-animals/invasive-mammals/european-rabbits/rabbit-haemorrhagic-disease-virus-rabbit-calicivirus-a-biocontrol-for-wild-rabbit-populations/protecting-your-domestic-rabbits-from-calicivirus).
Please also note that RHDV2 - another calicivirus variant present in the Tasmanian environment - is not registered for use as a biological control agent, is NOT released by the Tasmanian Government, but is present in rabbit communities.
For more information on rabbit management, visit https://nre.tas.gov.au/.../invasive-mammals/european-rabbits