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: 3082
Ground-nesting marine bird distribution and potential for human disturbance in Glacier Bay National Park Ground-nesting marine bird distribution and potential for human disturbance in Glacier Bay National Park
No abstract available.
Authors
Mayumi L. Arimitsu, Marc D. Romano, John F. Piatt
Alaska resource data file: Melozitna quadrangle Alaska resource data file: Melozitna quadrangle
No abstract available.
Authors
David J. Szumigala, Garth E. Graham
Microbe concentrations, laser particle counts, and stable hydrogen and oxygen isotope ratios in samples from a riverbank filtration study, Platte River, Nebraska, 2002 to 2004 Microbe concentrations, laser particle counts, and stable hydrogen and oxygen isotope ratios in samples from a riverbank filtration study, Platte River, Nebraska, 2002 to 2004
No abstract available.
Authors
J. R. Vogel, S.I. Harris, T.B. Coplen, E.W. Rice, Ingrid M. Verstraeten
Walrus foraging marks on the seafloor in Bristol Bay, Alaska: A reconnaissance survey Walrus foraging marks on the seafloor in Bristol Bay, Alaska: A reconnaissance survey
A reconnaissance sidescan sonar survey in Bristol Bay, Alaska revealed extensive areas of seafloor with features related to walrus foraging. They are similar to those seen in areas such as the outer Bering Sea and Chukchi Sea. Two types of feature were observed: (a) small (≪1 m diameter) shallow pits, often in clusters ranging in density from 5 pits per hectare to 35 pits per hectare...
Authors
Brian D. Bornhold, Chadwick V. Jay, Robert McConnaughey, Glenda Rathwell, Karl Rhynas, William Collins
Co-occurrence of Pacific sleeper sharks Somniosus pacificus and harbor seals Phoca vitulina in Glacier Bay Co-occurrence of Pacific sleeper sharks Somniosus pacificus and harbor seals Phoca vitulina in Glacier Bay
We present evidence that Pacific sleeper sharks Somniosus pacificus co-occur with harbor seals Phoca vitulina in Glacier Bay, Alaska, and that these sharks scavenge or prey on marine mammals. In 2002, 415 stations were fished throughout Glacier Bay on a systematic sampling grid. Pacific sleeper sharks were caught at 3 of the 415 stations, and at one station a Pacific halibut Hippoglossus
Authors
S. James Taggart, A.G. Andrews, Jennifer Mondragon, E.A. Mathews
Examples Examples
No abstract available.
Authors
Trent L. McDonald, Steven C. Amstrup, Eric V. Regehr, Bryan F.J. Manly
Individual variation in staging and timing of spring migration of Pacific common eiders in Alaska Individual variation in staging and timing of spring migration of Pacific common eiders in Alaska
Timing of migration and characterization of migration patterns of birds are usually based on dates of peak migration to and from staging, wintering, and breeding areas used by the bulk of a species. For Pacific common eiders (Somateria mollissima v-nigrum), as well as other species, the timing of migration into and through the Beaufort Sea is based on counts of birds past land or ice...
Authors
Margaret R. Petersen
Population genetic structure of annual and perennial populations of Zostera marina L. along the Pacific coast of Baja California and the Gulf of California Population genetic structure of annual and perennial populations of Zostera marina L. along the Pacific coast of Baja California and the Gulf of California
The Baja California peninsula represents a biogeographical boundary contributing to regional differentiation among populations of marine animals. We investigated the genetic characteristics of perennial and annual populations of the marine angiosperm, Zostera marina, along the Pacific coast of Baja California and in the Gulf of California, respectively. Populations of Z. marina from five...
Authors
Raquel Muñiz-Salazar, Sandra L. Talbot, George K. Sage, David H. Ward, Alejandro Cabello-Pasini
Association of ice and river channel morphology determined using ground-penetrationg radar in the Kuparuk River, Alaska Association of ice and river channel morphology determined using ground-penetrationg radar in the Kuparuk River, Alaska
We collected ground-penetrating radar data at 10 sites along the Kuparuk River and its main tributary, the Toolik River, to detect unfrozen water beneath river ice. We used 250 MHz and 500 MHz antennas to image both the ice-water interface and the river channel in late April 2001, when daily high temperatures were consistently freezing and river ice had attained its maximum seasonal...
Authors
Heather Best, J. P. McNamara, Lee M. Liberty
Population genetic structure and conservation of marbled murrelets (Brachyramphus marmoratus) Population genetic structure and conservation of marbled murrelets (Brachyramphus marmoratus)
Marbled murrelets (Brachyramphus marmoratus) are coastal seabirds that nest from California to the Aleutian Islands. They are declining and considered threatened in several regions. We compared variation in the mitochondrial control region, four nuclear introns and three microsatellite loci among 194 murrelets from throughout their range except Washington and Oregon. Significant...
Authors
Vicki L. Friesen, T.P. Birt, John F. Piatt, R.T. Golightly, S. H. Newman, P.N. Hebert, B.C. Congdon, G. Gissing
Alaska resource data file: Naknek quadrangle Alaska resource data file: Naknek quadrangle
No abstract available.
Authors
Frederic H. Wilson, Stan E. Church, Damon P. Bickerstaff
Handbook of capture-recapture analysis Handbook of capture-recapture analysis
Every day, biologists in parkas, raincoats, and rubber boots go into the field to capture and mark a variety of animal species. Back in the office, statisticians create analytical models for the field biologists' data. But many times, representatives of the two professions do not fully understand one another's roles. This book bridges this gap by helping biologists understand state-of...