Northern Continental Divide Ecosystem Grizzly Bear Population Monitoring Team Annual Report - 2005
Mace RD. 2006. Northern Continental Divide Ecosystem Grizzly Bear Population Monitoring Team Annual Report - 2005. Northern Continental Divide Ecosystem Grizzly Bear Monitoring. Grizzly Bear Population Monitoring-NCDE-2005. Montana Fish, Wildlife and Parks. Kalispell, Montana
The monitoring of grizzly bear population trend in the Northern Continental Divide Ecosystem (NCDE) was initiated in 2004, by following the survival and reproductive rates of radio-instrumented females. Thirty-two individual females were captured during the first 2 years of monitoring. Twenty-eight male grizzly bears were incidentally captured and released. Over these 2 years, the capture success averaged 1 grizzly bear capture per 17.3 trap-nights. No adult trend monitoring females died during 2004, but 2 subadult females did die that year. We monitored the fate of 31 adult trend monitoring female grizzly bears in 2005. All subadult females survived in 2005. Two of 27 adult females dies in 2005, of which 1 was a known mortality and 1 was classified as a probable mortality. We monitored the fate of 13 adult females that were captured for management actions in 2004 and 2005. These 13 adults were accompanied by 19 non-radioed young (cubs or yearlings). In total, 35 and 17 management bears were monitored in 2004 and 2005. Fifteen management bears, or their attendant young were known to die in 2004, and 2 died in 2005. Of these 15 management bear mortalities, 10 were removed from the ecosystem in management actions, 2 young were sent to a zoo after being orphaned, 1 was killed by a train, 1 bear was illegally killed, and 1 death was from an unknown cause. In 2004, 34 known or probable man-caused mortalities were recorded in the NCDE. We recorded 24 known/probable man-caused mortalities of grizzly bears in the NCDE as a whole during 2005.
- Type
- Published Report
- Authors
- Mace, Richard
- Date of Issue
- 2006-02
- Publisher
- Montana Fish, Wildlife and Parks
- Units
- CRCO , GLAC
- Keywords
- Bears, Distribution (Biodiversity), Grizzly Bear, northern continental divide ecosystem, Observations, Population Monitoring, Presence (Biodiversity), Ursos arctos