Density and biomass estimates for an interior Alaskan Brown Bear, Ursus arctos, population

Abstract

Intensive capture efforts for am interior Brown Bear, Ursus arctos, population in southcentral Alasks permitted calculation of minimum diesity estimate of one bear/61 km2 based on the total numbe of captured and observed bears. Petersen Index (mark-recapture) estimates on the smae data, corrected for biases, yielded an estimate considered more accurate of one bear/41 km2. Females with newborn cubs were identified as having lower probabilities of capture than other bears. Brow Bear biomass in the study area was estimated at 262 kg/200 km2.