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
Estimates of brown bear abundance on Kodiak Island, Alaska Estimates of brown bear abundance on Kodiak Island, Alaska
During 1987-94 we used capture-mark-resight (CMR) methodology and rates of observation (bears/hour and bears/100 km2) of unmarked brown bears (Ursus arctos middendorffi) during intensive aerial surveys (IAS) to estimate abundance of brown bears on Kodiak Island and to establish a baseline for monitoring population trends. CMR estimates were obtained on 3 study areas; density ranged from...
Authors
V.G. Barnes, R. B. Smith
Blood lead concentrations of spectacled eiders near the Kashunuk River, Yukon Delta National Wildlife Refuge, Alaska Blood lead concentrations of spectacled eiders near the Kashunuk River, Yukon Delta National Wildlife Refuge, Alaska
We collected, 342 blood samples from spectacled eiders (Somateria fischeri) on their breeding grounds in western Alaska from late May through to early August 1993–1995. Lead concentrations of ≥0.50 p.p.m. wet weight were found in the blood of 20% of the adult female eiders, 2% of the adult males and 6% of the ducklings. Lead was detected (≥0.02 p.p.m.) more frequently in the blood of...
Authors
J. Christian Franson, Margaret R. Petersen, Lynn H. Creekmore, Paul L. Flint, Milton R. Smith
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
A strategy for monitoring glaciers A strategy for monitoring glaciers
Glaciers are important features in the hydrologic cycle and affect the volume, variability, and water quality of runoff. Assessing and predicting the effect of glaciers on water resources require a monitoring program to provide basic data for this understanding. The monitoring program of the U.S. Geological Survey employs a nested approach whereby an intensively studied glacier is...
Authors
Andrew G. Fountain, Robert M. Krimmel, Dennis C. Trabant
1996 Volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory 1996 Volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory
During 1996, the Alaska Volcano Observatory (AVO) responded to eruptive activity, anomalous seismicity, or suspected volcanic activity at 10 of the approximately 40 active volcanic centers in the state of Alaska. As part of a formal role in KVERT (the Kamchatkan Volcano Eruption Response Team), AVO staff also disseminated information about eruptions and other volcanic unrest at six...
Authors
Christina A. Neal, Robert G. McGimsey
Precious metals associated with Late Cretaceous-early Tertiary igneous rocks of southwestern Alaska Precious metals associated with Late Cretaceous-early Tertiary igneous rocks of southwestern Alaska
Placer gold and precious metal-bearing lode deposits of southwestern Alaska lie within a region 550 by 350 km, herein referred to as the Kuskokwim mineral belt. This mineral belt has yielded 100,240 kg (3.22 Moz) of gold, 12, 813 kg (412,000 oz) of silver, 1,377,412 kg (39,960 flasks) of mercury, and modest amounts of antimony and tungsten derived primarily from the late Cretaceous-early...
Authors
Thomas K. Bundtzen, Marti L. Miller