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Providing evidence to improve practice

Individual study: Success of grizzly bear population augmentation in northwest Montana

Published source details

Kasworm W.F., Proctor M.F., Servheen C. & Paetkau D. (2007) Success of grizzly bear population augmentation in northwest Montana. The Journal of Wildlife Management, 71, 1261-1266


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

Translocate to re-establish or boost populations in native range Terrestrial Mammal Conservation

A study in 1990–2005 in a forest site in Montana and northern Idaho, USA (Kasworm et al. 2007) found that most translocated female brown bears Ursus arctos survived for at least one year after release and at least one of four reproduced in the release area. Three of the four translocated bears (75%) survived for at least one year. The fourth bear died of unknown causes. After 12 years, at least one translocated bear was alive and had produced two litters with different males. In 1990–1994, four young wild female bears were caught in southeastern British Columbia and released in the Cabinet Mountains (no more than one released each summer). Radio-satellite monitoring was carried out over 1–2 years after release. Hair samples were collected from 2000–2005 and genetic analysis was used to determine presence of translocated bears and their offspring.

(Summarised by Laura Bennett )