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Providing evidence to improve practice

Individual study: Post-release movements of introduced marten

Published source details

Davis M.H. (1983) Post-release movements of introduced marten. The Journal of Wildlife Management, 47, 59-66


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Use holding pens at release site prior to release of translocated mammals Terrestrial Mammal Conservation

A randomized, controlled study in 1975–1976 in a temperate forest in Wisconsin, USA (Davis 1983) found that when using holding pens prior to releasing translocated animals, American marten Martes americana survival was lower than when animals were released immediately after translocation. Eight of 10 American martens released after being held in pens died within 154 days. Only one of 11 animals released immediately after translocation had died within 161 days. None of the martens reproduced in this time. Thirty days after release, martens that had been held in pens stayed closer to the release site than did those released immediately (data not reported). In January 1975–April 1976, 124 martens, captured in Ontario, Canada, were released at a forest site in Wisconsin, USA. Twenty-six animals were held in pens at the release site for seven days before release and 97 animals were released within 48 hours of being transported to the site. Individuals were randomly assigned a release method. Twenty-one of the martens were radio-collared. Their movements were monitored until June 1976.

(Summarised by Paul Gerlach )