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The distribution patterns of Orthoptera are described for the boreal zone. The boreal fauna of Eurasia includes more than 81 species. Many of them are widely distributed. The monotypic genus Paracyphoderris Storozhenko and at least 13 species are endemics or subendemics. About 50 species are known from boreal North America. Four endemic species are distributed very locally. Relationships between the faunas of the Eurasian and North American parts of the boreal zone are relatively weak. The boreal assemblages are usually characterized by the low levels of species diversity and abundance. Grasshoppers and their relatives occupy almost exclusively open habitats, such as different types of meadows, mountain steppes...
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Sport fisheries season and management summaries for 2010 with preliminary information for 2011 in the Kuskokwim-Goodnews Management Area are presented. The Kuskokwim-Goodnews Management Area (KGMA) consists of all waters of the Kuskokwim River drainage, Kuskokwim Bay, and waters extending from the Naskonat Peninsula in the north to the south side of Cape Newenham in the south. Sport and subsistence fisheries target all five Pacific salmon species, as well as rainbow trout (Oncorhynchus mykiss), Dolly Varden (Salvelinus malma), sheefish (Stenodus leucichthys), Arctic grayling (Thymallus arcticus), and northern pike (Esox lucius). In 2010, angler-days totaled 21,339 with the largest proportion coming from the Kanektok...
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As part of cooperative efforts among state and federal agencies in the preparation for response to an avian influenza virus H5N1 outbreak in North America, we conducted aerial surveys during May and June, 2007, to investigate the chronology, distribution and areas of aggregation, and species of waterfowl present in Wrangell-St. Elias National Park and Preserve (the Park). Surveys were flown along transects spaced at 2-mile intervals throughout probable waterfowl habitat within the Park and were replicated in three consecutive weeks between 24 May and 13 June. Estimates of waterfowl abundance in the Park declined from a high of 25,115.8 (SE = 4,096.9) in week 1 to 15,159.2 (SE = 2,973.8) in week 2 to 13,762.5 (SE...
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The classic 10-year population cycle of snowshoe hares ( Lepus americanus, Erxleben 1777) and Canada lynx ( Lynx canadensis, Kerr 1792) in the boreal forests of North America has drawn much attention from both population and community ecologists worldwide; however, the ecological mechanisms driving the 10-year cyclic dynamic pattern are not fully revealed yet. In this study, by the use of historic fur harvest data, we constructed a series of generalized additive models to study the effects of density dependence, predation, and climate (both global climate indices of North Atlantic Oscillation index ( NAO), Southern Oscillation index ( SOI) and northern hemispheric temperature ( NHT) and local weather data including...
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We measured stable carbon and nitrogen isotope ratios in guard hair of 81 populations of grizzly bears (Ursus arctos L., 1758) across North America and used mixing models to assign diet fractions of salmon, meat derived from terrestrial sources, kokanee (Oncorhynchus nerka (Walbaum in Artedi, 1792)), and plants. In addition, we examined the relationship between skull size and diet of bears killed by people in British Columbia. The majority of carbon and nitrogen assimilated by most coastal grizzly bear populations was derived from salmon, while interior populations usually derived a much smaller fraction of their nutrients from salmon, even in areas with relatively large salmon runs. Terrestrial prey was a large...
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We assessed habitat preference of a lynx (Lynx canadensis) population through 8 years of a snowshoe hare (Lepus americanus) cycle. Seventy-four percent of our southern Yukon study area was approximately 30-year-old regenerating forest resulting from a large wildfire. The study area was not trapped and lynx density was very high compared with other populations in North America. Contrary to our prediction, there was no discernable shift in habitat preference through the hare cycle; however, our habitat types were coarsely mapped and our radiolocations relatively inaccurate. Lynx may have altered their habitat preferences at finer scales (for patches <2 ha). Lynx showed strong preference for regenerating habitats over...
Variation in the timing of migration to freshwaters to spawn is one important dimension of the life history variation within individual salmon stocks. That variable has important implications for developing sustainable fisheries that simultaneously exploit multiple populations within the same geographic area. We examined the variation in migration timing of adult Chinook Salmon Oncorhynchus tshawytscha within the Togiak River system of southwest Alaska to determine whether fish that spawned in different habitats migrated into freshwater from the ocean at different times. In particular, we evaluated whether there were watershed-wide effects of body size, sex, spawning location, and year on the timing of spawning-run...
Intensification of permafrost thaw has increased the frequency and magnitude of large permafrost slope disturbances (mega slumps) in glaciogenic terrain of northwestern Canada. Individual thermokarst disturbances up to 40 ha in area have made large volumes of previously frozen, highly weatherable fine-grained sediments available for leaching and transport to adjacent streams, significantly increasing sediment and solute loads in these systems. To test the effects of this climate-sensitive disturbance regime on the ecology of Arctic streams, we explored the relationship between physical and chemical variables and benthic macroinvertebrate communities in disturbed and undisturbed stream reaches in the Peel Plateau...


map background search result map search result map Spatial and Genetic Relationships of Fishers in Boreal Mixed-Wood Forests of Northeastern British Columbia Linking climate change to population cycles of hares and lynx Life history and age at maturity of an anadromous smelt, the eulachon Thaleichthys pacificus (Richardson) Western toad, Bufo boreas, stewardship in the Yukon: Yukon biodiversity report Fishery management report for sport fisheries in the Kuskokwim-Goodnews management area, 2010 Distribution Patterns of Grasshoppers and Their Kin in the Boreal Zone Seasonal changes in glucocorticoid and testosterone concentrations in free-living arctic ground squirrels from the boreal forest of the Yukon Habitat preference of Canada lynx through a cycle in snowshoe hare abundance Major components of grizzly bear diet across North America Spatial distribution of meadow jumping mice (Zapus hudsonius) in logged boreal forest of northwestern Canada Wildlife studies at Fort Wainwright and Fort Greely, Central Alaska, 1998 (Final Report) Mammal inventory of Alaska's National Parks and Preserves: Northwest Network - Western Arctic Parklands (Annual Report 2001) Wolf management report of survey-inventory activities, 1 July, 1999 - 30 June, 2002 Zones of Restricted Activitiy for Protection of Key Fish Areas Along the Trans-Alaska Pipeline System on Federally- Administered Lands Population dynamics of wolves and their prey in Denali National Park, Alaska: progress report (May 2000 - April 2001) Aerial Waterfowl Surveys: Wrangell-St. Elias National Park and Preserve, Alaska May-June 2007 Aerial Waterfowl Surveys: Wrangell-St. Elias National Park and Preserve, Alaska May-June 2007 Wildlife studies at Fort Wainwright and Fort Greely, Central Alaska, 1998 (Final Report) Population dynamics of wolves and their prey in Denali National Park, Alaska: progress report (May 2000 - April 2001) Wolf management report of survey-inventory activities, 1 July, 1999 - 30 June, 2002 Seasonal changes in glucocorticoid and testosterone concentrations in free-living arctic ground squirrels from the boreal forest of the Yukon Mammal inventory of Alaska's National Parks and Preserves: Northwest Network - Western Arctic Parklands (Annual Report 2001) Fishery management report for sport fisheries in the Kuskokwim-Goodnews management area, 2010 Zones of Restricted Activitiy for Protection of Key Fish Areas Along the Trans-Alaska Pipeline System on Federally- Administered Lands Western toad, Bufo boreas, stewardship in the Yukon: Yukon biodiversity report Habitat preference of Canada lynx through a cycle in snowshoe hare abundance Distribution Patterns of Grasshoppers and Their Kin in the Boreal Zone Life history and age at maturity of an anadromous smelt, the eulachon Thaleichthys pacificus (Richardson) Major components of grizzly bear diet across North America Spatial and Genetic Relationships of Fishers in Boreal Mixed-Wood Forests of Northeastern British Columbia Linking climate change to population cycles of hares and lynx Spatial distribution of meadow jumping mice (Zapus hudsonius) in logged boreal forest of northwestern Canada