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North American caribou (Rangifer tarandus) herds commonly exhibit little nuclear genetic differentiation among adjacent herds, although available evidence supports strong demographic separation, even for herds with seasonal range overlap. During 1997–2003, we studied the Mentasta and Nelchina caribou herds in south-central Alaska using radiotelemetry to determine individual movements and range overlap during the breeding season, and nuclear and mitochondrial DNA (mtDNA) markers to assess levels of genetic differentiation. Although the herds were considered discrete because females calved in separate regions, individual movements and breeding-range overlap in some years provided opportunity for male-mediated gene...
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Invasive species are a concern worldwide as they can displace native species, reduce biodiversity, and disrupt ecological processes. European bird cherry (Prunus padus) (EBC) is an invasive ornamental tree that is rapidly spreading and possibly displacing native trees along streams in parts of urban Alaska. The objectives of this study were to: 1) map the current distribution of EBC along two Anchorage streams, Campbell and Chester creeks, and 2) determine the effects of EBC on selected ecological processes linked to stream salmon food webs. Data from the 2009 and 2010 field seasons showed: EBC was widely distributed along Campbell and Chester creeks; EBC leaf litter in streams broke down rapidly and supported similar...
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A content analysis of PCMB meeting minutes from its first meeting to 1993 reveals a repeated pattern of communication in which Native hunters pose questions about the need for caribou research requiring the use of aircraft and collars and the handling of animals, and a response by agency managers to inform community residents about the value of collars in science and/or demonstrating their application. Never discussed openly at PCMB meetings was what the Gwich'in regard as a negotiated order of power-sharing arrangement between Gwich'in and caribou, established in the time before there was time, nunh ttrotsit ultsui gwuno (when the earth was first made), when caribou were people and people were caribou. As told...
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Nutritional restrictions in winter may reduce the availability of protein for reproduction and survival in northern ungulates. We refined a technique that uses recently voided excreta on snow to assess protein status in wild caribou (Rangifer tarandus) in late winter. Our study was the first application of this non-invasive, isotopic approach to assess protein status of wild caribou by determining dietary and endogenous contributions of nitrogen (N) to urinary urea. We used isotopic ratios of N (?15N) in urine and fecal samples to estimate the proportion of urea N derived from body N (p-UN) in pregnant, adult females of the Chisana Herd, a small population that ranged across the Alaska-Yukon border. We took advantage...
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Studies moose or Alces alces, caribou or Rangifer tarandus and grizzly bear or Ursus arctos distribution in relation to road traffic in Denali National Park, Alaska. Development of wildlife monitoring system using 19 landscape level viewsheds stratified into four sections based on decreasing traffic along the road corridor; Absence of traffic avoidance patterns for caribou and grizzly bears.
map background search result map search result map Ecological effects of invasive European bird cherry (Prunus padus) on salmonid food webs in Anchorage, Alaska streams Differential habitat selection by moose and elk in the Besa-Prophet area of northern British Columbia An isotopic approach to measuring nitrogen balance in caribou Population Structure and Genetic Diversity of Moose in Alaska River discharge predicts spatial distributions of beluga whales in the Upper Cook Inlet, Alaska, during early summer Species Listing under Canada's Species at Risk Act Using temporary dye marks to estimate ungulate population abundance in southwest Yukon, Canada Population characteristics, space use and habitat selection of two non-migratory caribou herds in central Alaska, 1994 - 2009 Extraordinary movements of the Denali caribou herd following the perfect storm Western Arctic caribou herd winter habitat monitoring and utilization, 1995-1996 Adult Salmon Runs and Streamflow Data at a Resistance Board Weir on Beaver Creek, Alaska, 1998-2000 Little Rancheria Caribou in the Yukon: Evaluation of Winter Habitat Quality and Habitat Use Caribou Hunters and Researchers at the Co-management Interface: Emergent Dilemmas and the Dynamics of Legitimacy in Power Sharing Moose, Caribou, and Grizzly Bear Distribution in Relation to Road Traffic in Denali National Park, Alaska Downstream Migrations of Juvenile Salmon and Other Fishes in the Upper Yukon River Range overlap and individual movements during breeding season influence genetic relationships of caribou herds in south-central Alaska Sonar estimation of chum salmon passage in the Aniak River, 2009 Adult Salmon Runs and Streamflow Data at a Resistance Board Weir on Beaver Creek, Alaska, 1998-2000 Ecological effects of invasive European bird cherry (Prunus padus) on salmonid food webs in Anchorage, Alaska streams Sonar estimation of chum salmon passage in the Aniak River, 2009 Using temporary dye marks to estimate ungulate population abundance in southwest Yukon, Canada Moose, Caribou, and Grizzly Bear Distribution in Relation to Road Traffic in Denali National Park, Alaska Extraordinary movements of the Denali caribou herd following the perfect storm Range overlap and individual movements during breeding season influence genetic relationships of caribou herds in south-central Alaska An isotopic approach to measuring nitrogen balance in caribou River discharge predicts spatial distributions of beluga whales in the Upper Cook Inlet, Alaska, during early summer Differential habitat selection by moose and elk in the Besa-Prophet area of northern British Columbia Population characteristics, space use and habitat selection of two non-migratory caribou herds in central Alaska, 1994 - 2009 Population Structure and Genetic Diversity of Moose in Alaska Little Rancheria Caribou in the Yukon: Evaluation of Winter Habitat Quality and Habitat Use Caribou Hunters and Researchers at the Co-management Interface: Emergent Dilemmas and the Dynamics of Legitimacy in Power Sharing Western Arctic caribou herd winter habitat monitoring and utilization, 1995-1996 Downstream Migrations of Juvenile Salmon and Other Fishes in the Upper Yukon River Species Listing under Canada's Species at Risk Act