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: 3090
Alaska resource data file: Tyonek quadrangle Alaska resource data file: Tyonek quadrangle
No abstract available.
Authors
Madelyn Millholland, J.R. Riehle
Natal and breeding philopatry in a black brant, Branta bernicla nigricans, metapopulation Natal and breeding philopatry in a black brant, Branta bernicla nigricans, metapopulation
We estimated natal and breeding philopatry and dispersal probabilities for a metapopulation of Black Brant (Branta bernicla nigricans) based on observations of marked birds at six breeding colonies in Alaska, 1986–1994. Both adult females and males exhibited high (>0.90) probability of philopatry to breeding colonies. Probability of natal philopatry was significantly higher for females...
Authors
Mark S. Lindberg, James S. Sedinger, Dirk V. Derksen, Robert F. Rockwell
Identification of polar bear den habitat in northern Alaska Identification of polar bear den habitat in northern Alaska
The goal of this project is to refine the information collected previously on maternal denning, into digital maps that show where polar bears are likely to create future dens in northern Alaska. Such maps will allow a priori recommendations regarding timing and geographic locations of proposed human developments; and hence provide managers with an important mitigation and management tool...
Authors
Steven C. Amstrup, Gerald W. Garner
Male traits, mating tactics and reproductive success in the buff-breasted sandpiper, Tryngites subruficollis Male traits, mating tactics and reproductive success in the buff-breasted sandpiper, Tryngites subruficollis
Buff-breasted sandpipers use a variety of mating tactics to acquire mates, including remaining at a single lek for most of the breeding season, attending multiple leks during the season, displaying solitarily or displaying both on leks and solitarily. We found that differences in body size, body condition, fluctuating asymmetry scores, wing coloration, territory location and behaviour...
Authors
Richard B. Lanctot, Patrick J. Weatherhead, Bart Kempenaers, Kim T. Scribner
Density-dependent effects on growth, body size, and clutch size in Black Brant Density-dependent effects on growth, body size, and clutch size in Black Brant
We documented gosling size in late summer, adult body size, and clutch size of known-age Black Brant (Branta bernicla nigricans) females nesting on the Tutakoke River colony between 1986 and 1995. During this period, the colony increased from 1,100 to >5,000 nesting pairs. Gosling mass at 30 days of age declined from 764 ± SE of 13 g and 723 ± 15 g for males and females, respectively, in...
Authors
James S. Sedinger, Mark S. Lindberg, Brian T. Person, Michael W. Eichholz, Mark P. Herzog, Paul L. Flint
Alaska resource data file: False Pass quadrangle Alaska resource data file: False Pass quadrangle
No abstract available.
Authors
Frederic H. Wilson
Alaska resource data file: Cold Bay quadrangle Alaska resource data file: Cold Bay quadrangle
No abstract available.
Authors
Frederic H. Wilson
Geologic studies in Alaska by the U.S. Geological Survey, 1995 Geologic studies in Alaska by the U.S. Geological Survey, 1995
This collection of 20 papers continues the annual series of U.S. Geological Survey (USGS) reports on geologic investigations in Alaska1 . Contributions cover a broad spectrum of earth science topics and report results from all parts of the State (fig. 1). USGS activities in Alaska include studies of environment and climate, hazards, resources, and geologic framework. Five papers in this...
Genetic differentiation of sockeye salmon subpopulations from a geologically young Alaskan lake system Genetic differentiation of sockeye salmon subpopulations from a geologically young Alaskan lake system
The Tustumena Lake drainage in southcentral Alaska is glacially turbid and geologically young (
Authors
C. V. Burger, William J. Spearman, M. A. Cronin
Alaska resource data file: Sleetmute quadrangle Alaska resource data file: Sleetmute quadrangle
No abstract available.
Authors
W. J. Keith, Marti L. Miller
Testing for handling bias in survival estimation for black brant Testing for handling bias in survival estimation for black brant
We used an ultrastructure approach in program SURVIV to test for, and remove, bias in survival estimates for the year following mass banding of female black brant (Branta bernicla nigricans). We used relative banding-drive size as the independent variable to control for handling effects in our ultrastructure models, which took the form: S = S0(1 - αD), where α was handling effect and D...
Authors
James S. Sedinger, Mark S. Lindberg, Eric A. Rexstad, Nathan Chelgren, David H. Ward
Estimating age of sea otters with cementum layers in the first premolar Estimating age of sea otters with cementum layers in the first premolar
We assessed sources of variation in the use of tooth cementum layers to determine age by comparing counts in premolar tooth sections to known ages of 20 sea otters (Enhydra lutris). Three readers examined each sample 3 times, and the 3 readings of each sample were averaged by reader to provide the mean estimated age. The mean (SE) of known age sample was 5.2 years (1.0) and the 3 mean...
Authors
James L. Bodkin, Jack A. Ames, Ronald J. Jameson, Ancel M. Johnson, Gary M. Matson