Brown bear population vital rates ...
Identifying mechanisms of population change is fundamental for conserving small and declining populations and determining effective management strategies. Few studies, however, have measured the demographic components of population change for small populations of mammals (< 50 individuals). We es...
| Main Author: | |
|---|---|
| Format: | Dataset |
| Language: | English |
| Published: |
Dryad
2021
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.5061/dryad.h44j0zpjb https://datadryad.org/stash/dataset/doi:10.5061/dryad.h44j0zpjb |
| Summary: | Identifying mechanisms of population change is fundamental for conserving small and declining populations and determining effective management strategies. Few studies, however, have measured the demographic components of population change for small populations of mammals (< 50 individuals). We estimated vital rates and trends in two adjacent but genetically distinct, threatened brown bear (Ursus arctos) populations in British Columbia, Canada, following the cessation of hunting. One population had approximately 45 resident bears but had some genetic and geographic connectivity to neighbouring populations, while the other population had < 25 individuals and was isolated. We estimated population-specific vital rates by monitoring survival and reproduction of telemetered female bears and their dependent offspring from 2005 to 2018. In the larger, connected population, independent female survival was 1.00 (95% CI: 0.96-1.00) and the survival of cubs in their first year was 0.85 (95% CI: 0.62-0.95). In the ... : ch_survival.txt: This dataset is the monthly survival and monitoring data of independent (not with mother) female grizzly bears. It is formatted for processing in Rmark with monthly intervals for 7 months and one 5 month interval for winter. Each year from 2005-2018. transition_reproductive_state.txt: Transitions between reproductive state for collared adult female grizzly bears in two adjacent populations. AA -alone to alone; AC - alone to with cubs; CY- with cubs to with yearlings; CA - with cubs to alone; Y-A yearling to alone; Y-T yearling to with two-year-old offspring; T-A with two-year-old offspring to alone or older offspring. coy_survial.txt: Dependent offspring survival in the first year of life and litter membership by population. yearling_survival.txt: Dependent offspring survival in the second year of life by population. primiparity.txt: Monitoring and reproduction of primiparous female grizzly bears by population. For each age, data show whether they had their first litter or not and whether ... |
|---|