Title
Application of Herd Viability Models for Boreal Woodland Caribou (Rangifer tarandus caribou) to a Northern Mountain Caribou Herd
Author(s)
Reid, D. G.;Francis, S. R.;Antoniuk, T.
Published
2013
Publisher
Canadian Wildlife Biology & Management
Abstract
Caribou (Rangifer tarandus) herds of the northern mountain population in British Columbia and Yukon are facing increased human development and habitat alteration. Managers need to better understand at what stage these changes will become a conservation issue. Historical declines in numerous herds of the Boreal Woodland Caribou population prompted development of three models relating herd viability to human footprint and proportion of the land base changed to early-seral conditions by natural or human disturbance. We applied these models to the range of a northern mountain herd, the Carcross Caribou Herd (CCH), in south-central Yukon, to understand whether and how the boreal models could be used in a northern mountain context. Two of the boreal models, one based on Canada-wide (CW) herds and one on Alberta (AB) herds, produced reasonable approximations of the current population status of the CCH (increasing). The minimal secure patch area requirement of the third model, based largely on Northwest Territories (NT) herds, could not be satisfied in the CCH range, if such secure patches necessarily include substantial winter range. The boreal models could not deal with the widespread and permanent shrub and sparsely vegetated habitats, often at high elevations, in Northern Mountain Caribou range, nor with the spatial segregation of the herds’ seasonal ranges, especially high-value winter ranges. The most robust conservation approach for Northern and Southern Mountain Caribou would be to develop new models based on the demographic and habitat profiles of numerous herds from these populations.
Access Full Text
A full-text copy of this article may be available. Please email the WCS Library to request.
![]()
Back
PUB14590