The American Mink Mustela vison in Ireland

AbstractThe American Mink Mustela vison was first introduced into Ireland in 1951 for commercial fur–farming and has successfully established itself in the wild from escaped stock. Initial concentrations of feral populations were in the north, north–west and in the Midlands, with scattered introductions in the south–west of the country. Data on mink farming and the species' present distribution were gathered from all available sources, including a survey conducted during 1984–1986. The feral mink is now widespread throughout the island with the exception of major portions of western counties, which it is currently colonizing. Populations are stabilizing in established zones and, although there is a need for control measures in certain situations, the overall threat to the limited Irish fauna does not appear as great as initially feared. The spread of the American Mink in other European countries is reviewed briefly.