Publications
USGS research activities relevant to Alaska have yielded more than 9400 historical publications. This page features some of the most recent newsworthy research findings.
Filter Total Items: 3082
Aniakchak sockeye salmon investigations Aniakchak sockeye salmon investigations
Aniakchak National Monument and Preserve provides unusual and dramatic landscapes shaped by numerous volcanic eruptions, a massive flood, enormous landslides, and ongoing geological change. The focal point of the monument is Aniakchak Caldera, a restless volcano that embodies the instability of the Alaska Peninsula. This geological instability creates a dynamic and challenging...
Authors
Troy R. Hamon, Scott A. Pavey, Joe L. Miller, Jennifer L. Nielsen
Polar bear research in the Beaufort Sea 2005 Polar bear research in the Beaufort Sea 2005
No abstract available.
Authors
Steven C. Amstrup, George M. Durner, E.V. Regehr, G.S. York, T. S. Smith, Steven T. Partridge, David C. Douglas
Evaluation of wolf density estimation from radiotelemetry data Evaluation of wolf density estimation from radiotelemetry data
Density estimation of wolves (Canis lupus) requires a count of individuals and an estimate of the area those individuals inhabit. With radiomarked wolves, the count is straightforward but estimation of the area is more difficult and often given inadequate attention. The population area, based on the mosaic of pack territories, is influenced by sampling intensity similar to the estimation...
Authors
John W. Burch, Layne G. Adams, Erich H. Follmann, Eric A. Rexstad
Ordovician "sphinctozoan" sponges from Prince of Wales Island, southeastern Alaska Ordovician "sphinctozoan" sponges from Prince of Wales Island, southeastern Alaska
A faunule of silicified hypercalcified "sphinctozoan" sponges has been recovered from a clast of Upper Ordovician limestone out of the Early Devonian Karheen Formation on Prince of Wales Island in southeastern Alaska. Included in the faunule are abundant examples of the new genus Girtyocoeliana, represented by Girtyocoeliana epiporata (Rigby and Potter), and Corymbospongia adnata Rigby...
Authors
J.K. Rigby, Susan M. Karl, R. B. Blodgett, J.F. Baichtal
Ground-nesting marine bird distribution and potential for human disturbance in Glacier Bay National Park Ground-nesting marine bird distribution and potential for human disturbance in Glacier Bay National Park
No abstract available.
Authors
Mayumi L. Arimitsu, Marc D. Romano, John F. Piatt
Alaska resource data file: Melozitna quadrangle Alaska resource data file: Melozitna quadrangle
No abstract available.
Authors
David J. Szumigala, Garth E. Graham
Microbe concentrations, laser particle counts, and stable hydrogen and oxygen isotope ratios in samples from a riverbank filtration study, Platte River, Nebraska, 2002 to 2004 Microbe concentrations, laser particle counts, and stable hydrogen and oxygen isotope ratios in samples from a riverbank filtration study, Platte River, Nebraska, 2002 to 2004
No abstract available.
Authors
J. R. Vogel, S.I. Harris, T.B. Coplen, E.W. Rice, Ingrid M. Verstraeten
Walrus foraging marks on the seafloor in Bristol Bay, Alaska: A reconnaissance survey Walrus foraging marks on the seafloor in Bristol Bay, Alaska: A reconnaissance survey
A reconnaissance sidescan sonar survey in Bristol Bay, Alaska revealed extensive areas of seafloor with features related to walrus foraging. They are similar to those seen in areas such as the outer Bering Sea and Chukchi Sea. Two types of feature were observed: (a) small (≪1 m diameter) shallow pits, often in clusters ranging in density from 5 pits per hectare to 35 pits per hectare...
Authors
Brian D. Bornhold, Chadwick V. Jay, Robert McConnaughey, Glenda Rathwell, Karl Rhynas, William Collins
Co-occurrence of Pacific sleeper sharks Somniosus pacificus and harbor seals Phoca vitulina in Glacier Bay Co-occurrence of Pacific sleeper sharks Somniosus pacificus and harbor seals Phoca vitulina in Glacier Bay
We present evidence that Pacific sleeper sharks Somniosus pacificus co-occur with harbor seals Phoca vitulina in Glacier Bay, Alaska, and that these sharks scavenge or prey on marine mammals. In 2002, 415 stations were fished throughout Glacier Bay on a systematic sampling grid. Pacific sleeper sharks were caught at 3 of the 415 stations, and at one station a Pacific halibut Hippoglossus
Authors
S. James Taggart, A.G. Andrews, Jennifer Mondragon, E.A. Mathews
Examples Examples
No abstract available.
Authors
Trent L. McDonald, Steven C. Amstrup, Eric V. Regehr, Bryan F.J. Manly
Individual variation in staging and timing of spring migration of Pacific common eiders in Alaska Individual variation in staging and timing of spring migration of Pacific common eiders in Alaska
Timing of migration and characterization of migration patterns of birds are usually based on dates of peak migration to and from staging, wintering, and breeding areas used by the bulk of a species. For Pacific common eiders (Somateria mollissima v-nigrum), as well as other species, the timing of migration into and through the Beaufort Sea is based on counts of birds past land or ice...
Authors
Margaret R. Petersen
Population genetic structure of annual and perennial populations of Zostera marina L. along the Pacific coast of Baja California and the Gulf of California Population genetic structure of annual and perennial populations of Zostera marina L. along the Pacific coast of Baja California and the Gulf of California
The Baja California peninsula represents a biogeographical boundary contributing to regional differentiation among populations of marine animals. We investigated the genetic characteristics of perennial and annual populations of the marine angiosperm, Zostera marina, along the Pacific coast of Baja California and in the Gulf of California, respectively. Populations of Z. marina from five...
Authors
Raquel Muñiz-Salazar, Sandra L. Talbot, George K. Sage, David H. Ward, Alejandro Cabello-Pasini