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To conserve woodland caribou, resource managers and biologists must understand the processes governing movements and distribution of those animals. I employed a scale-explicit approach to understand some of the mechanisms influencing caribou behaviour. I trailed caribou in forested and alpine habitats and recorded attributes of feeding sites and patches. At larger scales, I used GPS collars to record the movements of caribou. At the scale of the feeding site, caribou cratered at locations with lower snow depths and greater amounts of a variety of terrestrial lichen species. Following increases in snow depth, hardness, and density, caribou in the forest fed more frequently at trees with abundant arboreal lichens....
The National Wildlife Refuge System in the United States includes about 150 million acres of lands and waters within 550 refuges managed for conservation. A variety of laws, regulations, and management polices help ensure these areas will be preserved for future generations. In a web-based survey, 35 refuges reported having established populations of moose (A ices alces) within their boundaries with nearly 40 million acres of moose habitat, 99% in Alaska. The 4 recognized sub-species of moose in North America were represented on refuges found in 12 states. Approximately 39,000 moose were reported inhabiting refuges in the USA; about 38,000 in Alaska. Only 9 refuges used management practices specifically to benefit...
The NRC report reached 17 conclusions and associated recommendations, most of which urged that predator management efforts have a more cautious, research-based, conservative, experimental, and adaptive approach that included public involvement and economic evaluations (NRC 1997). MANAGEMENT IMPLICATIONS Because predator reduction in Alaska has been mandated by a state statute since 1994, ADFG biologists who may be concerned about the widespread nature of efforts to reduce grizzly bear abundance have limited ability to change management direction or emphasis.
Active geomorphic fans experience debris flows, debris floods and/or floods (hydrogeomorphic processes) that can be hazards to humans. Grizzly bears (Ursus arctos) can also be a hazard to humans. This paper presents the results of a cross-disciplinary study that analyzed both hydrogeomorphic and grizzly bear hazards to wilderness campers on geomorphic fans along a popular hiking trail in Kluane National Park and Reserve in southwestern Yukon Territory, Canada. Based on the results, a method is proposed to reduce the risks to campers associated with camping on fans. The method includes both landscape and site scales and is based on easily understood and readily available information regarding weather, vegetation,...
Background Elucidating geographic locations from where migratory birds are recruited into adult breeding populations is a fundamental but largely elusive goal in conservation biology. This is especially true for species that breed in remote northern areas where field-based demographic assessments are logistically challenging. Methodology/Findings Here we used hydrogen isotopes (δD) to determine natal origins of migrating hatch-year lesser scaup (Aythya affinis) harvested by hunters in the United States from all North American flyways during the hunting seasons of 1999-2000 (n = 412) and 2000-2001 (n = 455). We combined geospatial, observational, and analytical data sources, including known scaup breeding range,...
Since listing, the status of wood bison has improved because enactment and enforcement of national and international laws and treaties have minimized the impacts of hunting and trade, and reintroduction of disease-free herds has increased the number of free-ranging herds in Canada from 1 population of 300 in 1978, to 7 populations totaling 4,414 bison in 2008. In 1974, the first list of federally protected species under the 1973 Endangered Species Act (Act; 16 U.S.C. 1531 et seq.) appeared in the Code of Federal Regulations (CFR), and the wood bison appeared on this list based on its inclusion on the original 1969 list. Because the wood bison was listed under the 1969 Endangered Species Conservation Act and grandfathered...
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We present a database application designed to standardize the collection and entry of brown and black bear (Ursus arctos and U. americanus)--human interaction data, formalize data storage methods, and analyze patterns of bear--human interactions in Alaska's National Parks. The National Park Service Alaska Region Bear--Human Information Management System (BHIMS) facilitates the systematic collection of biologically relevant data, consolidates bear management information, helps identify management priorities, facilitates the development of science-based bear management plans, helps evaluate the effectiveness of management strategies, helps provide more effective bear safety messages, creates permanent digital copies...
Development of hydrocarbon resources across northwest Canada has spurred economic prosperity but also generated concerns over impacts to biodiversity. To balance these interests, comprehensive land use plans have been used to match targeted management strategies to ecological components deemed valuable by society such as wildlife. I used remote wildlife cameras to measure the response patterns of American marten and black bear to seismic lines, a ubiquitous linear feature in western Canada. Relative to undisturbed forest locations, marten avoid open and wide seismic lines, but not narrow and recovered lines; occupancy at the home range scale also declines with increasing seismic line density. By contrast, black...
map background search result map search result map A multi-scale behavioural approach to understanding the movements of woodland caribou Systematic collection of bear--human interaction information for Alaska's national parks Dynamic multistate site occupancy models to evaluate hypotheses relevant to conservation of Golden Eagles in Denali National Park, Alaska A multi-scale behavioural approach to understanding the movements of woodland caribou Systematic collection of bear--human interaction information for Alaska's national parks Dynamic multistate site occupancy models to evaluate hypotheses relevant to conservation of Golden Eagles in Denali National Park, Alaska