FERAL cats arrived on Dirk Hartog Island in two separate waves, but are now reproductively isolated, according to genetic analysis.
Part of the Dirk Hartog Restoration program, the research means good news for efforts to eradicate cats from the island and reintroduce the wildlife populations they have killed off.
Department of Parks and Wildlife senior research scientist David Algar says 10 of the original 13 native mammal species on the island have become extinct.
“The extirpated species of mainly medium-sized mammals include boodie (Bettongia lesueur), woylie (Bettongia penicillata), Western barred bandicoot (Perameles bougainville) and chuditch (Dasyurus geoffroii),” Dr Algar says.
“Only smaller species still inhabit the island: ash-grey mouse (Pseudomys albocinereus), sandy inland mouse (Pseudomys hermannsburgensis), and the little long-tailed dunnart (Sminthopsis dolichura).
“There’s also an issue with cat predation on a number of bird species on the island, and also the reptiles as well.”
http://www.sciencewa.net.au/topics/environment-a-conservation/item/3193-genetics-denote-feral-cat-source