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: 3084
Population estimates of Nearctic shorebirds Population estimates of Nearctic shorebirds
Estimates are presented for the population sizes of 53 species of Nearctic shorebirds occurring regularly in North America, plus four species that breed occasionally. Shorebird population sizes were derived from data obtained by a variety of methods from breeding, migration and wintering areas, and formal assessments of accuracy of counts or estimates are rarely available. Accurate...
Authors
R. I. G. Morrison, Robert E. Gill, B. A. Harrington, S. K. Skagen, G. W. Page, C. L. Gratto-Trevor, S. M. Haig
Nearshore fish distributions in an Alaskan estuary in relation to stratification, temperature, and salinity Nearshore fish distributions in an Alaskan estuary in relation to stratification, temperature, and salinity
Fish were sampled with beach seines and small-meshed beam trawls in nearshore ( 1 km) and shallow ( 25 m) habitats on the southern coast of Kachemak Bay, Cook Inlet, Alaska, from June to August, 1996-1998. Fish distributions among habitats were analysed for species composition, catch-per-unit-effort (CPUE) and frequency of occurrence. Two oceanographically distinct areas of Kachemak Bay...
Authors
Alisa A. Abookire, John F. Piatt, Martin D. Robards
Mechanisms of population differentiation in marbled murrelets: historical versus contemporary processes Mechanisms of population differentiation in marbled murrelets: historical versus contemporary processes
Mechanisms of population differentiation in highly vagile species such as seabirds are poorly understood. Previous studies of marbled murrelets (Brachyramphus marmoratus; Charadriiformes: Alcidae) found significant population genetic structure, but could not determine whether this structure is due to historical vicariance (e.g., due to Pleistocene glaciers), isolation by distance, drift...
Authors
B.C. Congdon, John F. Piatt, Kathy Martin, Vicki L. Friesen
The Tintina Gold Belt - A global perspective The Tintina Gold Belt - A global perspective
The so-called Tintina Gold Belt extends for more than 1000 km along the length of the northern North American Cordillera. Middle to Late Cretaceous Au deposits within the belt have various similar characteristics, among which are a spatial and temporal association with magmatism; Bi-W-Te signatures in deposits hosted by granitod stocks and As-Sb signatures where hosted by sedimentary...
Authors
Richard J. Goldfarb, Craig J. R. Hart, Marti L. Miller, Lance D. Miller, G. Lang Farmer, David I. Groves
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
Geologic map of the Wildcat Lake 7.5' quadrangle, Kitsap and Mason Counties, Washington Geologic map of the Wildcat Lake 7.5' quadrangle, Kitsap and Mason Counties, Washington
The Wildcat Lake quadrangle lies in the forearc of the Cascadia subduction zone, about 20-km east of the Cascadia accretionary complex exposed in the Olympic Mountains (Tabor and Cady, 1978),and about 100-km west of the axis of the Cascades volcanic arc. The quadrangle lies near the middle of the Puget Lowland, which typically has elevations less than 600 feet (183 m), but on Gold...
Authors
Peter J. Haeussler, Kenneth P. Clark
Geologic map of the Christian quadrangle, Alaska Geologic map of the Christian quadrangle, Alaska
Most of the Christian quadrangle is in the Porcupine Plateau; the northwestern part is in the southern Brooks Range, and the southern quarter is in the Yukon Flats. Outcrops of bedrock are poor or lacking, except in the Brooks Range. Although large valley glaciers have moved through the Porcupine Plateau, along the East Fork Chandalar and Vanticlese Creek, most of the upland areas in the...
Authors
W. P. Brosge, H. N. Reiser
The bedrock geology of Seattle The bedrock geology of Seattle
No abstract available.
Authors
R. A. Haugerud, Peter J. Haeussler
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
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