Mark Haroldson, Wildlife Biologist for the Interagency Grizzly Bear Study Team at the USGS Northern Rocky Mountain Science Center was quoted by Idaho Fish and Game reporting the following reproduction and motatility statistics:
As of September 1, 2006, 8 human-caused grizzly bear mortalities have been documented in the Greater Yellowstone Ecosystem. These losses resulted from 2 road kills, 1 mistaken identity kill, 1 management removal, and 4 that are under investigation. Six of the documented mortalities to date were male bears; 2 were females. In addition, a skull was found from a bear that likely died during the fall of 2003. Cause of death could not be determined.
Preliminary numbers this year indicate at least 46 unique females with cubs of the year. Haroldson stated “this year’s high count of females was expected after last years lower than normal count of 31. This was likely due to more females available for breeding during 2005 and a relatively good pine nut crop that fall.” Haroldson went on to say that “overall, in addition to whitebark pine, we have had a good food year with abundant biscuit root, yampa, clover, and berries, plus very few bear-human conflicts.”