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Migratory Golden Eagles ( Aquila chrysaetos) from Alaska winter across a vast region of western North America, much of which is undergoing rapid change from a diversity of indirect and direct human activities. To address recent conservation concerns, we are studying the year-round movements of migratory Golden Eagles from interior and northern Alaska to identify and evaluate potential risks to their survival. We are also developing new survey techniques to estimate population size and trends. As part of our ongoing studies, we observed migrating Golden Eagles in spring and autumn 2014 during field investigations to locate Golden Eagle capture sites in eastern interior Alaska, and in spring 2015 during capture activities....
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Life history variability includes phenotypic variation in morphology, age, and size at key stage transitions and arises from genotypic, environmental, and genotype-by-environment effects. Life history variation contributes to population abundance, productivity, and resilience, and management units often reflect life history classes. Recent evidence suggests that past Chinook salmon (Oncorhynchus tshawytscha) classifications (e.g., ‘stream’ and ‘ocean’ types) are not distinct evolutionary lineages, do not capture the phenotypic variation present within or among populations, and are poorly aligned with underlying ecological and developmental processes. Here we review recently reported variation in juvenile Chinook...
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The article presents the result of monitoring conducted on nests built by Golden eagle, Aquila chrysaetos, at Denali National Park and Preserve in Alaska. The observation includes territory occupancy and breeding activities of the eagle, rate of nesting success and production. The types of tree and plant branches used, the estimated age of the nests and the relations of egg with the nest are also monitored.
map background search result map search result map Linking climate change projections for an Alaskan watershed to future coho salmon production CARIBOU RISING: DEFENDING THE PORCUPINE HERD, GWICH-'IN CULTURE, AND THE ARCTIC NATIONAL WILDLIFE REFUGE . Rick Bass. 2004. San Francisco: Sierra Club Books. xii + 164 p, hard cover. ISBN 1-57805-114-2. $19.95 Migratory patterns of wild Chinook salmon Oncorhynchus tshawytscha returning to a large, free-flowing river basin Sonar Estimation of Chinook and Fall Chum Salmon Passage in the Yukon River Near Eagle, Alaska, 2013 Potential natural and anthropogenic impediments to the conservation and recovery of Cook Inlet beluga whales, Delphinapterus leucas Evaluating tools used to estimate and manage browse available to wintering moose on the Copper River Delta, Alaska Range expansion of moose in arctic Alaska linked to warming and increased shrub habitat Operational Plan: Kenai River Adult Chinook salmon monitoring South Nahanni and Coal River Northern Mountain Caribou Herds: Population Status and Demographic Characteristics Observations of Migrating Golden Eagles ( Aquila chrysaetos) in Eastern Interior Alaska Offer Insights On Population Size and Migration Monitoring What Came First, the Nest or the Egg? An Unusual Golden Eagle Nest Observed in Denali National Park and Preserve, Alaska Changes in horn size of Stone's sheep over four decades correlate with trophy hunting pressure An assessment of mineral development adjacent to Kluane National Park and Reserve, Yukon Trophic pathways supporting juvenile Chinook and coho salmon in the glacial Susitna River, Alaska: patterns of freshwater, marine, and terrestrial food resource use across a seasonally dynamic habitat mosaic Future of Pacific Salmon in the Face of Environmental Change: Lessons from One of the World's Remaining Productive Salmon Regions Diversity of juvenile Chinook salmon life history pathways Cadmium and other elements in tissues from four ungulate species from the Mackenzie Mountain region of the Northwest Territories, Canada Space Use and Habitat Associations of Long-Distance Migratory First-Year Golden Eagles (Aquila Chrysaetos) from Interior Alaska in a Changing Landscape Operational Plan: Kenai River Adult Chinook salmon monitoring Linking climate change projections for an Alaskan watershed to future coho salmon production Evaluating tools used to estimate and manage browse available to wintering moose on the Copper River Delta, Alaska An assessment of mineral development adjacent to Kluane National Park and Reserve, Yukon Future of Pacific Salmon in the Face of Environmental Change: Lessons from One of the World's Remaining Productive Salmon Regions What Came First, the Nest or the Egg? An Unusual Golden Eagle Nest Observed in Denali National Park and Preserve, Alaska Space Use and Habitat Associations of Long-Distance Migratory First-Year Golden Eagles (Aquila Chrysaetos) from Interior Alaska in a Changing Landscape Sonar Estimation of Chinook and Fall Chum Salmon Passage in the Yukon River Near Eagle, Alaska, 2013 South Nahanni and Coal River Northern Mountain Caribou Herds: Population Status and Demographic Characteristics Trophic pathways supporting juvenile Chinook and coho salmon in the glacial Susitna River, Alaska: patterns of freshwater, marine, and terrestrial food resource use across a seasonally dynamic habitat mosaic Observations of Migrating Golden Eagles ( Aquila chrysaetos) in Eastern Interior Alaska Offer Insights On Population Size and Migration Monitoring Potential natural and anthropogenic impediments to the conservation and recovery of Cook Inlet beluga whales, Delphinapterus leucas CARIBOU RISING: DEFENDING THE PORCUPINE HERD, GWICH-'IN CULTURE, AND THE ARCTIC NATIONAL WILDLIFE REFUGE . Rick Bass. 2004. San Francisco: Sierra Club Books. xii + 164 p, hard cover. ISBN 1-57805-114-2. $19.95 Range expansion of moose in arctic Alaska linked to warming and increased shrub habitat Changes in horn size of Stone's sheep over four decades correlate with trophy hunting pressure Migratory patterns of wild Chinook salmon Oncorhynchus tshawytscha returning to a large, free-flowing river basin Diversity of juvenile Chinook salmon life history pathways Cadmium and other elements in tissues from four ungulate species from the Mackenzie Mountain region of the Northwest Territories, Canada