TASMANIA'S Liberal Opposition claims that the State Government is about to sack 20 fox task force field officers. The Liberal spokesman for Primary Industries, Rene Hidding, said the staff would make way for people with no experience in fox eradication from the doomed Department of Environment, Parks, Heritage and the Arts.``It is of critical importance that Tasmania remains a showpiece of biodiversity and free from foxes and yet Labor has demonstrated their total disregard for this aim,'' Mr Hidding said.``If reports I am receiving are true, by failing to recontract some 20 front line fox task force field officers, all of whom possess advanced firearm, hunting and bush skills, and replacing them with other staff, Labor has proven it is not committed to eradicating the red fox from Tasmania.''Primary Industries Minister David Llewellyn said the Government was committed to fox eradication but said changes were occurring in the program "because some of the fixed-term positions had reached the end of their two-year contracts"."The positions have to be refilled through an appropriate recruitment process, consistent with the requirements of the State Service."The positions, in the first instance, will be subject to the Government's vacancy referral process, which allows for suitably qualified permanent public servants to apply for the positions."If, after this process, they remain unfilled, the positions will be advertised generally," Mr Llewellyn said.