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: 3111
Alaska resource data file: Saint Lawrence quadrangle Alaska resource data file: Saint Lawrence quadrangle
No abstract available.
Authors
T. L. Hudson
Alaska resource data file: Petersburg quadrangle Alaska resource data file: Petersburg quadrangle
No abstract available.
Authors
D. J. Grybeck, Henry C. Berg
Alaska resource data file: Circle quadrangle Alaska resource data file: Circle quadrangle
No abstract available.
Authors
C. J. Freeman, Janet Schaefer
Surficial geologic map along the Castle Mountain Fault between Houston and Hatcher Pass Road, Alaska Surficial geologic map along the Castle Mountain Fault between Houston and Hatcher Pass Road, Alaska
The surficial geology of the map area is dominated by sedimentary deposits laid down during and after the Naptowne glaciation (Karlstrom, 1964) of late Pleistocene age. During this episode, a large valley glacier flowed westward down the Matanuska Valley along the southern flank of the Talkeetna Mountains. The youngest of two documented advances has been referred to as the Elmendorf...
Authors
Peter J. Haeussler
DNA and allozyme markers provide concordant estimates of population differentiation: Analyses of U.S. and Canadian populations of Yukon River fall-run chum salmon (Oncorhynchus keta) DNA and allozyme markers provide concordant estimates of population differentiation: Analyses of U.S. and Canadian populations of Yukon River fall-run chum salmon (Oncorhynchus keta)
Although the number of genetic markers available for fisheries research has steadily increased in recent years, there is limited information on their relative utility. In this study, we compared the performance of different "classes" of genetic markers (mitochondrial DNA (mtDNA), nuclear DNA (nDNA), and allozymes) in terms of estimating levels and partitioning of genetic variation and of...
Authors
Kim T. Scribner, Penelope A. Crane, William J. Spearman, Lisa W. Seeb
Reproductive performance of female Alaskan caribou Reproductive performance of female Alaskan caribou
We examined the reproductive performance of female caribou (Rangifer tarandus granti) in relation to age, physical condition, and reproductive experience for 9 consecutive years (1987-95) at Denali National Park, Alaska, during a period of wide variation in winter snowfall. Caribou in Denali differed from other cervid populations where reproductive performance has been investigated...
Authors
Layne G. Adams, Bruce W. Dale
Flow-cytometric determination of genotoxic effects of exposure to petroleum in mink and sea otters Flow-cytometric determination of genotoxic effects of exposure to petroleum in mink and sea otters
Three experiments were conducted to investigate the genotoxic effects of crude oil on mink and sea otters, In the first experiment, the effects on mink of chronic exposure to weathered Prudhoe Bay crude oil were studied, Female mink were fed a diet that included weathered crude oil for a period of 3 weeks prior to mating, during pregnancy and until weaning. Kits were exposed through...
Authors
J. W. Bickham, J.A. Mazet, J. Blake, M.J. Smolen, Y. Lou, Brenda E. Ballachey
Dinucleotide repeat polymorphisms in waterfowl (family Anatidae): Characterization of a sex-linked (Z-specific) and 14 autosomal loci Dinucleotide repeat polymorphisms in waterfowl (family Anatidae): Characterization of a sex-linked (Z-specific) and 14 autosomal loci
Canada goose (Branta Canadensis) and harlequin duck (Histrionicus histrionicus) DNAs were digested with Sau3AI, and size selected (300-700 bp) fragments were ligated into BamHI-digested pBluscriptII KS+. The enrichment protocol of Ostrander et al.1 was followed. The resulting libraries were screened using a [ƴ-32P]ATP end-labelled (CA)20 oligonucleotides as a hybridization probe...
Authors
W.G. Buchholz, John M. Pearce, Barbara J. Pierson, Kim T. Scribner
Water quality in the central Nebraska basins, Nebraska, 1992-95 Water quality in the central Nebraska basins, Nebraska, 1992-95
This report is intended to summarize major findings that emerged between 1992 and 1995 from the water-quality assessment of the Central Nebraska Basins Study Unit and to relate these findings to water-quality issues of regional and national concern. The information is primarily intended for those who are involved in waterresource management. Indeed, this report addresses many of the...
Authors
S.A. Frenzel, R. B. Swanson, T.L. Huntzinger, J. K. Stamer, P.J. Emmons, R. B. Zelt
Nesting ecology of Spectacled Eiders Somateria fischeri on the Indigirka River Delta, Russia Nesting ecology of Spectacled Eiders Somateria fischeri on the Indigirka River Delta, Russia
In 1994 and 1995 we investigated breeding biology and nest site habitat of Spectacled Eiders on two study areas within the coastal fringe of the Indigirka River Delta, Russia (71°20' N, 150°20' E). Spectacled Eiders were first observed on 6 June in both years and nesting commenced by mid-June. Average clutch size declined with later nest initiation dates by 0.10 eggs per day; clutches...
Authors
John M. Pearce, Daniel Esler, Andrei G. Degtyarev
Geobotanical aspects of Simeonof Island, Shumagin Islands, southwestern Alaska Geobotanical aspects of Simeonof Island, Shumagin Islands, southwestern Alaska
No abstract available.
Authors
F.J.A. Daniels, Stephen S. Talbot, Sandra L. Talbot, W.B. Schofield
Geologic map of central (interior) Alaska Geologic map of central (interior) Alaska
No abstract available.
Authors
Frederic H. Wilson, James H. Dover, Dwight Bradley, Florence R. Weber, Thomas K. Bundtzen, Peter J. Haeussler