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

Intensive capture efforts for an interior Brown Bear, Ursus arctos, population in southcentral Alaska permitted calculation of a minimum density estimate of one bear/61 km2 based on the total number of captured and observed bears. Petersen Index (mark-recapture) estimates on the same 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. Brown Bear biomass in the study area was estimated at 262 kg/200 km?.