Unviable feral cat population results in eradication success on Wedge Island, Tasmania

Abstract

Wedge Island in southeast Tasmania is 43 ha in size and is habitat for Little Penguin (Eudyptula minor) and Short-tailed Shearwater (Ardenna tenuirostris) populations. The island was subject to a feral Cat (Felis catus) eradication attempt in 2003 when 13 cats were captured with the assistance of trained detection dogs. It was known at least one cat remained. No further cats were captured during two subsequent visits in 2003 and 2004 and a single dead cat was found in 2012. It appeared the cat population never recovered from the initial knockdown and this ultimately resulted in eradication success. Methods used and details of cats caught are provided and the program is discussed in terms of criteria required for a successful eradication.