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Summary: "Aspects of migration, fattening, and molt in trans-continental passerine migrants were examined during spring and autumn migration in Fairbanks, Alaska (64050' N, 147050' W). From 1992-1998, 25,718 birds of 18 species were banded. Based on median dates of spring and autumn passage, species-level estimates of the duration of breeding range occupation ranged from 48 to 129 days. Adults departed significantly later than immatures in 11 of the 18 species examined and significantly earlier than immatures in only one species, the Alder Flycatcher. Adults had significantly higher fat scores than immatures in most species, but these differences were attributable to the influence of ambient temperatures, length...
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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...
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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...
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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.
map background search result map search result map Local Ecological Knowledge of Staging Areas for Geese in the Western Canadian Arctic Kenai Peninsula Brown Bear Conservation Strategy Temporal patterns of migration, molt, and fat storage among high-latitude passerine migrants A review of the ecology, management and conservation of the northern goshawk in British Columbia Furbearer management technique development Kill rate by wolves on moose in the Yukon Wolf functional response and regulation of moose in the Yukon Pacific Flyway management plan for the western population of tundra swans Grizzly bear harvest management in British Columbia: Background report Molecular Genetic Approaches in Wildlife Management Short-term impacts of military jet overflights on the Fortymile caribou herd during the calving season Identifying and Evaluating Techniques for Wildlife Habitat Enhancement in Interior Alaska Status review and extinction assessment of Cook Inlet belugas (Delphinapterus leucas) CONSERVATION PLAN for the COOK INLET BELUGA WHALE (Delphinapterus leucas) Prioritizing avian conservation areas for the Yellowstone to Yukon Region of North America [electronic resource] Management Plan for Elk (Cervus elaphus) in the Yukon Respect for Grizzly Bears: an Aboriginal Approach for Co-existence and Resilience Arctic Network Caribou Monitoring Protocol Development Summary Regional Assessment of Wildlife in the Yukon Southern Lakes Region: Volume 1: Context and Recommendations Local Ecological Knowledge of Staging Areas for Geese in the Western Canadian Arctic Short-term impacts of military jet overflights on the Fortymile caribou herd during the calving season Temporal patterns of migration, molt, and fat storage among high-latitude passerine migrants Molecular Genetic Approaches in Wildlife Management Kenai Peninsula Brown Bear Conservation Strategy Regional Assessment of Wildlife in the Yukon Southern Lakes Region: Volume 1: Context and Recommendations Identifying and Evaluating Techniques for Wildlife Habitat Enhancement in Interior Alaska Kill rate by wolves on moose in the Yukon Status review and extinction assessment of Cook Inlet belugas (Delphinapterus leucas) CONSERVATION PLAN for the COOK INLET BELUGA WHALE (Delphinapterus leucas) Arctic Network Caribou Monitoring Protocol Development Summary Management Plan for Elk (Cervus elaphus) in the Yukon Furbearer management technique development A review of the ecology, management and conservation of the northern goshawk in British Columbia Grizzly bear harvest management in British Columbia: Background report Pacific Flyway management plan for the western population of tundra swans Respect for Grizzly Bears: an Aboriginal Approach for Co-existence and Resilience Prioritizing avian conservation areas for the Yellowstone to Yukon Region of North America [electronic resource]