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: 3099
Polar bears of the Severnaya Zemlya Archipelago of the Russian Arctic Polar bears of the Severnaya Zemlya Archipelago of the Russian Arctic
No abstract available.
Authors
Stanislav Belikov, G.W. Garner, O. Wiig, Andrei N. Boltunov, Y.A. Gorbunov
Evaluation of radio-tracking and strip transect methods for determining foraging ranges of Black-Legged Kittiwakes Evaluation of radio-tracking and strip transect methods for determining foraging ranges of Black-Legged Kittiwakes
We compared strip transect and radio-tracking methods of determining foraging range of Black-legged Kittiwakes (Rissa tridactyla). The mean distance birds were observed from their colony determined by radio-tracking was significantly greater than the mean value calculated from strip transects. We determined that this difference was due to two sources of bias: (1) as distance from the...
Authors
William D. Ostrand, G.S. Drew, R.M. Suryan, L.L. McDonald
Responses of brown bears to human activities at O'Malley River, Kodiak Island, Alaska Responses of brown bears to human activities at O'Malley River, Kodiak Island, Alaska
We classified levels of direct response of brown bears (Ursus arctos middendorffi) to aircraft, watercraft, and groups of people on the O'Malley River area of Kodiak Island, Alaska. General public use occurred on the area in 1991 and 1993, whereas structured bear viewing programs used the area in 1992 and 1994. Brown bears displayed high (running) or moderate (walking away) response on...
Authors
Gregory A. Wilker, Victor G. Barnes
Alaska resource data file: McCarthy quadrangle Alaska resource data file: McCarthy quadrangle
Descriptions of the mineral occurrences shown on the accompanying figure follow. See U.S. Geological Survey (1996) for a description of the information content of each field in the records. The data presented here are maintained as part of a statewide database on mines, prospects and mineral occurrences throughout Alaska.
Authors
Donald Richter
Alaska resource data file: Saint Lawrence quadrangle Alaska resource data file: Saint Lawrence quadrangle
No abstract available.
Authors
T. L. Hudson
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
Birds of the Indigirka River Delta, Russia: Historical and biogeographic comparisons Birds of the Indigirka River Delta, Russia: Historical and biogeographic comparisons
We documented the breeding status and relative abundance of all avian species on the coastal portion of the Indigirka River Delta during spring and summer 1993-95. Data on avifaunal composition were then compared to data from adjacent areas from Eastern Siberia to the Chukotka Peninsula to evaluate how species composition changes longitudinally within the arctic and typical tundra zones...
Authors
John M. Pearce, Daniel Esler, Andrei G. Degtyarev
A model of northern pintail productivity and population growth rate A model of northern pintail productivity and population growth rate
Our objective was to synthesize individual components of reproductive ecology into a single estimate of productivity and to assess the relative effects of survival and productivity on population dynamics. We used information on nesting ecology, renesting potential, and duckling survival of northern pintails (Anas acuta) collected on the Yukon-Kuskokwim Delta (Y-K Delta), Alaska, 1991-95...
Authors
Paul L. Flint, J. Barry Grand, Robert F. Rockwell
Damage reduction to ponderosa pine seedlings from northern pocket gophers by vegetation management through grass seeding and herbicide treatment Damage reduction to ponderosa pine seedlings from northern pocket gophers by vegetation management through grass seeding and herbicide treatment
2,4-D herbicide treatment was applied to 2 treatment units to remove the forbs that are the preferred food of pocket gophers. One of these units also was seeded with grasses prior to the 2,4-D treatment. The effect of 2,4-D and grass seeding plus 2,4-D treatments were compared to an untreated control unit. Long-term monitoring (7 yr) was conducted on the 3 units for vegetative cover (7...
Authors
Richard M. Engeman, V.G. Barnes, R.M. Anthony, Heather W. Krupa
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