Individual study: Demographic analyses of a hunted black bear population with access to a refuge
Powell R.A., Zimmerman J.W., Seaman D.E. & Gilliam J.F. (1996) Demographic analyses of a hunted black bear population with access to a refuge. Conservation Biology, 10, 224-234
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Legally protect habitat for mammals
A site comparison study in 1981–1990 in a mixed forest area in North Carolina, USA (Powell et al. 1996) found that there were more black bears Ursus americanus in a bear sanctuary than on adjacent non-sanctuary land. Bears were detected at a higher rate in the bear sanctuary (0.01–0.04 bear visits/station/day) than outside the sanctuary (0–0.01 bear visits/station/day). In 1981, a total of 136 bait stations (68 in the sanctuary and 68 on adjacent non-sanctuary land) were established. The two parts of the study area were approximately equal in size and, combined, covered >400 km2. In 1981–1990, at each station, two open cans of sardines were nailed to a tree. After five days, bait stations were revisited and any signs of bear visits noted. It was unclear how often the bait stations were baited each year.
(Summarised by Phil Martin)