Perth Zoo funds raised have been used for the conservation of Sumatran orangutan, Sumatran tiger, Sumatran elephant, African painted dog, sun bears, tree kangaroos, Javan gibbons and Australian native species. More than $881,000 has been raised since the program began. Working with the Department of Environment and Conservation, Perth Zoo breeds threatened Western Australian animal species for release into managed areas of habitat in the wild as part of its Native Species Breeding Program. As of 2011, Perth Zoo breeds numbats, western swamp tortoises, dibblers, woylies and threatened Western Australian frog species. The numbat ("Myrmecobius fasciatus") Western Australia's mammal emblem and one
Hip replacement heat-treated alloys and a lack of special surgical experience accounting for most of the failures. In 2010, surgeons at medical centers such as the Mayo Clinic reported reducing their use of metal-on-metal implants by 80 percent over the previous year in favor of those made from other materials, like combinations of metal and plastic. The cause of these failures remain controversial, and may include both design factors, technique factors, and factors related to patient immune responses (allergy type reactions). In the United Kingdom the Medicines and Healthcare Products Regulatory Agency commenced an annual monitoring regime for metal-on-metal hip replacement patients