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|Author(s) :||C. Lawton, P. Cowan, S. Bertolino, P.W.W. Lurz & A.R. Peters|
Two examples of the introduction of non-indigenous invasive species are reviewed: the grey squirrel in Europe (United Kingdom, Ireland and Italy) and the brushtail possum in New Zealand. Both have become very successful in their respective non-native habitats since their introductions in the mid-to-late 19th Century. Both species impact extensively on native biodiversity, environmental sustainability, forestry, and agriculture through a range of direct and indirect mechanisms. Management is currently mainly by lethal control, namely poisoning, trapping and shooting. Such methods of control are, however, increasingly contentious for both species, and alternative, non-lethal methods of population control, e.g. fertility control, are being developed.
Brushtail possum – Grey squirrel – Invasive alien species – Sciurus carolinensis – Translocations – Trichosurus vulpecula.