Filters: Tags: A1-Wildlife (X)29 results (139ms)
We studied the kill rate by wolves (Canis lupus) after a large-scale wolf removal when populations of wolves, moose (Alces alces), and woodland caribou (Rangifer tarandus caribou) were all increasing. We followed a total of 21 wolf packs for 4 winters, measuring prey selection, kill rates, and ecological factors that could influence killing behavior. Wolf predation was found to be mainly additive on both moose and caribou populations. Kill rates by individual wolves were inversely related to pack size and unrelated to prey density or snow depth. Scavenging by ravens decreased the amount of prey biomass available for wolves to consume, especially for wolves in smaller packs. The kill rate by wolves on moose calves...
We studied kill rates by wolves (Canis lupus) on a rapidly growing moose population in the east-central Yukon. We added these data to the cumulative functional response curve obtained in other North American wolf studies. Our kill rates are higher than those predicted at low moose densities. The kill rate increases rapidly, reaching 2.4 moose per wolf per 100 days at 0.26 moose/km2 and remains constant at this level. No data are available below 0.2 moose/km2 to indicate the shape of the ascending curve. Based on moose distribution and the low prey-switching ability of wolves, we suggest that the functional response curve is of type II. Our wolf predation rate model predicts that moose are held to a low density equilibrium...
Regional Assessment of Wildlife in the Yukon Southern Lakes Region: Volume 1: Context and Recommendations
The northern goshawk (Accipiter gentilis) is a rare to uncommon forest raptor that is widely distributed in boreal & temperate forests. This report first reviews the goshawk's distribution, taxonomy, biology, habitat, threats to its population, conservation status, and current conservation & research actions related to this species in British Columbia. It then sets out options for management of the goshawk's habitat and a strategy for conservation that would maintain or enhance the goshawk population. Finally, priorities for research are recommended and actions to evaluate the conservation initiative are outlined.
Short-term impacts of military jet overflights on the Fortymile caribou herd during the calving season
Regional Assessment of Wildlife in the Yukon Southern Lakes Region: Volume 2: Species Status Assessment
Prioritizing avian conservation areas for the Yellowstone to Yukon Region of North America [electronic resource]