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: 3107
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
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
Microsatellite analyses of San Franciscuito Creek rainbow trout Microsatellite analyses of San Franciscuito Creek rainbow trout
Microsatellite genetic diversity found in San Francisquito Creek rainbow trout support a close genetic relationship with rainbow trout (Oncorhynchus mykiss) from another tributary of San Francisco Bay, Alameda Creek, and coastal trout found in Lagunitas Creek, Marin County, California. Fish collected for this study from San Francisquito Creek showed a closer genetic relationship to fish...
Authors
Jennifer L. Nielsen
Spectacled Eider (Somateria fischeri) Spectacled Eider (Somateria fischeri)
No abstract available.
Authors
Margaret R. Petersen, J. Barry Grand, Christian P. Dau
Survival of adult murres and kittiwakes in relation to forage fish abundance Survival of adult murres and kittiwakes in relation to forage fish abundance
Some seabird populations damaged by the Exxon Valdez oil spill continue to decline or are not recovering. In order to understand the ultimate cause of seabird population fluctuations, we must measure productivity, recruitment, and adult survival. Recent APEX studies focused on measuring productivity only. Recruitment measurement demands an unrealistic study duration. We propose to...
Authors
John F. Piatt
Migration of the Acadian Orogen and foreland basin across the Northern Appalachians of Maine and adjacent areas Migration of the Acadian Orogen and foreland basin across the Northern Appalachians of Maine and adjacent areas
The timing of Acadian orogenesis in Maine is reassessed, on the basis of a new Silurian-Devonian time scale, new U/Pb and 40Ar/39Ar ages of Acadian plutons, new conodont and palynomorph ages of strata that constrain the age of deformation, and published information. This analysis shows that the Acadian deformation front migrated some 240 km (present distance) from southeast to northwest...
Authors
Dwight Culver Bradley, Robert D. Tucker, Daniel R. Lux, Anita G. Harris, D. Colin McGregor
Alaska resource data file: Unimak quadrangle Alaska resource data file: Unimak quadrangle
No abstract available.
Authors
Steven H. Pilcher
Alaska resource data file: Ugashik quadrangle Alaska resource data file: Ugashik quadrangle
No abstract available.
Authors
Steven H. Pilcher
Alaska resource data file: Bristol Bay quadrangle Alaska resource data file: Bristol Bay quadrangle
No abstract available.
Authors
Steven H. Pilcher
Alaska resource data file: Umnak quadrangle Alaska resource data file: Umnak quadrangle
No abstract available.
Authors
Steven H. Pilcher
Alaska resource data file: Sutwik Island quadrangle Alaska resource data file: Sutwik Island quadrangle
No abstract available.
Authors
Steven H. Pilcher