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: 3088
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1, 1994 through December 31, 1999 Catalog of earthquake hypocenters at Alaskan volcanoes: January 1, 1994 through December 31, 1999
The Alaska Volcano Observatory (AVO), a cooperative program of the U.S. Geological Survey, the Geophysical Institute of the University of Alaska - Fairbanks, and the Alaska Division of Geological and Geophysical Surveys, has maintained a seismic monitoring program at potentially active volcanoes in Alaska since 1988 (Power and others, 1993; Jolly and others, 1996). The primary objectives...
Authors
Arthur D. Jolly, Scott D. Stihler, John A. Power, John C. Lahr, John Paskievitch, Guy Tytgat, Steve Estes, Andrew B. Lockhart, Seth C. Moran, Stephen R. McNutt, William R. Hammond
Sex-biased gene flow in spectacled eiders (Anatidae): Inferences from molecular markers with contrasting modes of inheritance Sex-biased gene flow in spectacled eiders (Anatidae): Inferences from molecular markers with contrasting modes of inheritance
Genetic markers that differ in mode of inheritance and rate of evolution (a sex-linked Z-specific microsatellite locus, five biparentally inherited microsatellite loci, and maternally inherited mitochondrial [mtDNA] sequences) were used to evaluate the degree of spatial genetic structuring at macro- and microgeographic scales, among breeding regions and local nesting populations within...
Authors
Kim T. Scribner, Margaret R. Petersen, Raymond L. Fields, Sandra L. Talbot, John M. Pearce, Ronald K. Chesser
Effects of recent climate warming on caribou habitat and calf survival Effects of recent climate warming on caribou habitat and calf survival
Migratory Barren-Ground Caribou Rangifer tarandus granti are the most important subsistence resource for northern indigenous peoples. They are likely to respond to global climatic changes that affect the distribution of their forage resources and the availability of forage through the year. The Porcupine Caribou herd is a large, internationally migratory herd of about 128,000 individuals...
Authors
Brad Griffith, David C. Douglas, Donald E. Russell, Robert G. White, Thomas R. McCabe, Kenneth R. Whitten
Serologic survey for canine coronavirus in wolves from Alaska Serologic survey for canine coronavirus in wolves from Alaska
Wolves (Canis lupus) were captured in three areas of Interior Alaska (USA). Four hundred twenty-five sera were tested for evidence of exposure to canine coronavirus by means of an indirect fluorescent antibody procedure. Serum antibody prevalence averaged 70% (167/240) during the spring collection period and 25% (46/185) during the autumn collection period. Prevalence was 0% (0/42) in...
Authors
Randall L. Zarnke, Jim F. Evermann, Jay M. Ver Hoef, Mark E. McNay, Rodney D. Boertje, Craig L. Gardner, Layne G. Adams, Bruce W. Dale, John W. Burch
Marine Mammals: Sea otters Marine Mammals: Sea otters
No abstract available.
Authors
James L. Bodkin
Remote identification of polar bear maternal den habitat in northern Alaska Remote identification of polar bear maternal den habitat in northern Alaska
Polar bears (Ursus maritimus) give birth in dens of ice and snow to protect their altricial young. During the snow-free season, we visited 25 den sites located previously by radiotelemetry and characterized the den site physiognomy. Seven dens occurred in habitats with minimal relief. Eighteen dens (72%) were in coastal and river banks. These "banks" were identifiable on aerial...
Authors
George M. Durner, Steven C. Amstrup, Ken J. Ambrosius
Recommended features of protocols for long-term ecological monitoring Recommended features of protocols for long-term ecological monitoring
In 1991, the National Park Service (NPS) selected seven parks to serve as prototypes for development of a long-term ecological monitoring program. Denali National Park and Preserve was one of the prototype parks selected. The principal focus of this national program was to detect and document resource changes and to understand the forces driving those changes. One of the major tasks of...
Authors
Karen L. Oakley, Susan L. Boudreau, Sioux-Z Humphrey
Estimating repeatability of egg size Estimating repeatability of egg size
Measures of repeatability have long been used to assess patterns of variation in egg size within and among females. We compared different analytical approaches for estimating repeatability of egg size of Black Brant. Separate estimates of repeatability for eggs of each clutch size and laying sequence number varied from 0.49 to 0.64. We suggest that using the averaging egg size within...
Authors
Paul L. Flint, R.F. Rockwell, J.S. Sedinger
Using GIS to analyze animal movements in the marine environment Using GIS to analyze animal movements in the marine environment
Advanced methods for analyzing animal movements have been little used in the aquatic research environment compared to the terrestrial. In addition, despite obvious advantages of integrating geographic information systems (GIS) with spatial studies of animal movement behavior, movement analysis tools have not been integrated into GIS for either aquatic or terrestrial environments. We...
Authors
Philip N. Hooge, William M. Eichenlaub, Elizabeth K. Solomon
Alaska resource data file: Goodnews Bay quadrangle Alaska resource data file: Goodnews Bay quadrangle
No abstract available.
Authors
Travis Hudson
Alaska resource data file: Stepovak Bay quadrangle Alaska resource data file: Stepovak Bay quadrangle
No abstract available.
Authors
S. H. Pilcher
Alaska resource data file: Cordova quadrangle Alaska resource data file: Cordova quadrangle
No abstract available.
Authors
S.W. Nelson