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
Movements and distribution of polar bears in the Beaufort sea Movements and distribution of polar bears in the Beaufort sea
We fitted 173 satellite radio collars (platform transmitter terminals) to 121 adult female polar bears in the Beaufort Sea and relocated the bears 44 736 times between 1985 and 1995. We regularly resighted many instrumented bears so that we could ascertain whether changes in movements or distribution were related to reproductive status. Mean short-term movement rates were less than 2 km...
Authors
Steven C. Amstrup, George M. Durner, I. Stirling, N.J. Lunn, F. Messier
Seasonal movements and pelagic habitat use of Murres and Puffins determined by satellite telemetry Seasonal movements and pelagic habitat use of Murres and Puffins determined by satellite telemetry
We tracked the movements of Common Murres (Uria aalge), Thick-billed Murres (U. lomvia), and Tufted Puffins (Fratercula cirrhata) using surgically implanted satellite transmitters. From 1994–1996, we tagged 53 birds from two colonies in the Gulf of Alaska (Middleton Island and Barren Islands) and two colonies in the Chukchi Sea (Cape Thompson and Cape Lisburne). Murres and puffins ranged...
Authors
Scott A. Hatch, P.M. Meyers, D.M. Mulcahy, David C. Douglas
Alaska resource data file: Kantishna River quadrangle Alaska resource data file: Kantishna River quadrangle
No abstract available.
Authors
C.S. Rombach
Alaska resource data file, Chignik quadrangle Alaska resource data file, Chignik quadrangle
Descriptions of the mineral occurrences can be found in the report. 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
Steven H. Pilcher
Proceedings of a workshop concerning walrus survey methods Proceedings of a workshop concerning walrus survey methods
In March 2000, the U.S. Fish and Wildlife Service and U.S. Geological Survey hosted a workshop to evaluate various techniques and approaches to estimate the size and trend of the Pacific walrus population. Workshop participants included American and Russian experts in walrus biology and survey design, subsistence hunters, and resource managers. Workshop participants reviewed previous...
Authors
Joel L. Garlich-Miller, Chadwick V. Jay
Microsatellites: Evolutionary and methodological background and empirical applications at individual, population, and phylogenetic levels Microsatellites: Evolutionary and methodological background and empirical applications at individual, population, and phylogenetic levels
The recent proliferation and greater accessibility of molecular genetic markers has led to a growing appreciation of the ecological and evolutionary inferences that can be drawn from molecular characterizations of individuals and populations (Burke et al. 1992, Avise 1994). Different techniques have the ability to target DNA sequences which have different patterns of inheritance...
Authors
Kim T. Scribner, John M. Pearce
Colonization and development of stream communities across a 200-year gradient in Glacier Bay National Park, Alaska Colonization and development of stream communities across a 200-year gradient in Glacier Bay National Park, Alaska
In May 1997, physical and biological variables were studied in 16 streams of different ages and contrasting stages of development following glacial recession in Glacier Bay National Park, southeast Alaska. The number of microcrustacean and macroinvertebrate taxa and juvenile fish abundance and diversity were significantly greater in older streams. Microcrustacean diversity was related to...
Authors
Alexander M. Milner, E. Eric Knudsen, Chad Soiseth, Anne L. Robertson, Don Schell, Ian T. Phillips, Katrina Magnusson
The bedrock geology of Seattle The bedrock geology of Seattle
No abstract available.
Authors
R. A. Haugerud, Peter J. Haeussler
Testing assumptions for unbiased estimation of survival of radiomarked harlequin ducks Testing assumptions for unbiased estimation of survival of radiomarked harlequin ducks
Unbiased estimates of survival based on individuals outfitted with radiotransmitters require meeting the assumptions that radios do not affect survival, and animals for which the radio signal is lost have the same survival probability as those for which fate is known. In most survival studies, researchers have made these assumptions without testing their validity. We tested these...
Authors
Daniel Esler, Daniel M. Mulcahy, Robert L. Jarvis
Predictability of Bristol Bay, Alaska, sockeye salmon returns one to four years in the future Predictability of Bristol Bay, Alaska, sockeye salmon returns one to four years in the future
Historically, forecast error for returns of sockeye salmon Oncorhynchus nerka to Bristol Bay, Alaska, has been large. Using cross-validation forecast error as our criterion, we selected forecast models for each of the nine principal Bristol Bay drainages. Competing forecast models included stock-recruitment relationships, environmental variables, prior returns of siblings, or...
Authors
Milo D. Adkison, R.M. Peterson
Age- and sex-specific mortality and population structure in sea otters Age- and sex-specific mortality and population structure in sea otters
We used 742 beach-cast carcasses to characterize age- and sex-specific sea otter mortality during the winter of 1990-1991 at Bering Island, Russia. We also examined 363 carcasses recovered after the 1989 grounding of the T/V Exxon Valdez, to characterize age and sex composition in the living western Prince William Sound (WPWS) sea otter population. At Bering Island, mortality was male...
Authors
James L. Bodkin, A.M. Burdin, D.A. Ryazanov
Genetic contribution of three introduced life history forms of sockeye salmon to colonization of Frazer Lake, Alaska Genetic contribution of three introduced life history forms of sockeye salmon to colonization of Frazer Lake, Alaska
No abstract available.
Authors
C. V. Burger, K.T. Scribner, W.J. Spearmen, C.O. Swanton, D.E. Campton