Mercury, arsenic, antimony, and selenium contents of sediment from the Kuskokwim River, Bethel, Alaska, USA
H. E. Belkin, H.M. Sparck
1993, Environmental Geology (22) 106-110
The Kuskokwim River at Bethel, Alaska, drains a major mercury-antimony metallogenic province in its upper reaches and tributaries. Bethel (population 4000) is situated on the Kuskokwim floodplain and also draws its water supply from wells located in river-deposited sediment. A boring through overbank and floodplain sediment has provided material to...
Tilting, burial, and uplift of the Guadalupe Igneous Complex, Sierra Nevada, California
Peter J. Haeussler, Scott R. Paterson
1993, Geological Society of America Bulletin (105) 1310-1320
It is often incorrectly assumed that plutons have a relatively uneventful structural history after emplacement. The 151 Ma Guadalupe Igneous Complex (GIC) in the Foothills Terrane, California, was involved in three post-emplacement events: (1) ∼30° of southwestside-up tilting during ductile regional faulting and contraction, (2) burial of the pluton from...
Distribution and abundance of Marbled Murrelets in Alaska
John F. Piatt, R. Glenn Ford
1993, The Condor (95) 662-669
Most seabirds breed in colonies on offshore islands, but throughout most of their range from California to Alaska Marbled Murrelets (Brachyramphus marmoratus) fly inland to nest on trees in old-growth coniferous forests. Some fraction of the murrelet population nests on the ground in Alaska. The relative distribution and abundance of...
Survival and pre-fledging body mass in juvenile emperor geese
Joel A. Schmutz
1993, The Condor (95) 222-225
A positive relationship exists between fledgling body mass and juvenile survival for some altricial (Krementz et al. 1989, Magrath 1991, Linden et al. 1992) and precocial (Owen and Black 1989, Longcore et al. 1991, Francis et al. 1992) species. Because the energetic demands of migration are high, physiologic condition may...
Channel geometry data of streams in the lower Drift River basin affected by the 1989-90 eruptions of Redoubt Volcano, Alaska
J.M. Dorava, B.A. May, D. F. Meyer, L.V. Myers
1993, Open-File Report 93-94
No abstract available....
Losses of seabirds in gill nets in the North Pacific
Anthony R. DeGange, Robert H. Day, Jean E. Takekawa, Vivian M. Mendenhall
Kees Vermeer, K.T. Briggs, K.H. Morgan, D. Siegel-Causey, editor(s)
1993, Conference Paper, The status, ecology and conservation of marine birds of the North Pacific
Existing knowledge on high-seas and coastal gillnet fisheries known to kill seabirds in the North Pacific is summarized. Recent estimates suggest that high-seas gillnet fisheries may have taken more than 500,000 seabirds in 1990. The majority of birds taken in those fisheries were Sooty Puffinus griseus or Short-tailed P. tenuirostris...
Autumn diet of lesser snow geese staging in northeastern Alaska
Alan W. Brackney, Jerry W. Hupp
1993, Journal of Wildlife Management (57) 55-61
The coastal plain of the Arctic National Wildlife Refuge (ANWR) is used by lesser snow geese (Chen caerulescens caerulescens) in autumn for premigratory staging. To better understand the potential impacts of human disturbance on snow geese, we investigated species composition of, and temporal and age-related variation in, their diet during...
Dutrochus, a new microdomatid (Gastropoda) genus from the Middle Devonian (Eifelian) of west-central Alaska
R. B. Blodgett
1993, Journal of Paleontology (67) 194-197
A new gastropod genus, Dutrochus, is established for members of the family Microdomatidae that are characterized by a reticulate ornament of spiral cords and intersecting, finer collabral threads, with all but one spiral cord being of nearly equal strength, and the single remaining cord being of stronger...
Seabirds of the central North Pacific
P.J. Gould, John F. Piatt
Kees Vermeer, K.T. Briggs, K.H. Morgan, D. Siegel-Causey, editor(s)
1993, Conference Paper, The status, ecology and conservation of marine birds of the North Pacific
No abstract available....
Kappa-casein polymorphisms among cattle breeds and bison herds
M. A. Cronin, N. Cockett
1993, Animal Genetics (24) 135-138
We identified the HindIII restriction site polymorphism of K-casein in cattle reported by Pinder et al. (Animal Genetics 22, 11, 1991) and found an additonal polymorphism (RsaI) in cattle and bison. The HindIII and RsaI restriction sites were mapped and three haplotypes (alleles) were identified. Preliminary screening of 39 cattle and 71 bison revealed one allele...
Epiguruk: A late Quaternary environmental record from northwestern Alaska
T. D. Hamilton, G.M. Ashley
1993, Geological Society of America Bulletin (105) 583-602
Epiguruk, a prominent bluff along the Kobuk River in northwestern Alaska, exposes a rich depositional record of Quaternary eolian and fluvial sand, with associated loess, paleosols, and periglacial features. Three major complexes of alluvial and eolian deposits are separated by two conspicuous organic-rich paleosols which formed during cool-moist interstadial intervals....
Directions of the US Geological Survey Landslide Hazards Reduction Program
G. F. Wieczorek
1993, Geografia Fisica e Dinamica Quaternaria (16) 21-25
The US Geological Survey (USGS) Landslide Hazards Reduction Program includes studies of landslide process and prediction, landslide susceptibility and risk mapping, landslide recurrence and slope evolution, and research application and technology transfer. Studies of landslide processes have been recently conducted in Virginia, Utah, California, Alaska, and Hawaii, Landslide susceptibility maps...
Reconnaissance guidelines for gold exploration in Central Alaska
T.D. Light, S. H. Moll, S. W. Bie, G. K. Lee
1993, Journal of Geochemical Exploration (47) 89-108
Distribution of more than 300 gold-bearing samples from the Livengood (Tolovana) and parts of the Fairbanks and Rampart mining districts in central Alaska, USA, indicate that the concentration of gold in placers is spatially related both to structural features and to Late Cretaceous and (or) Tertiary felsic plutons. The regional...
Implementation of biomarker-based studies
John J. Stegeman, Brenda E. Ballachey, J. Bickham, B. Hocker, S. Kennedy, H. Thompson, A.D. Vethaak
David B. Peakall, Lee R. Shugart, editor(s)
1993, Book chapter, Biomarkers: Research and application in the assessment of environmental health: Proceedings of the NATO advanced research workshop on biological markers
Biomarkers may be used to determine chemical exposure and effects in several important ways. These include (1) evaluation of new agricultural or industrial chemicals for effects, (2) screening of municipal or industrial effluents, (3) determining the geographic distribution of chemical effects in the environment and their changes over time, (4)...
Devonian volcanogenic massive sulfide deposits and occurrences, southern Yukon-Tanana Terrace, eastern Alaska Range, Alaska
I. M. Lange, W. J. Nokleberg, S.R. Newkirk, J. N. Aleinikoff, S. E. Church, H.R. Krouse
1993, Economic Geology (88) 344-376
A belt of volcanogenic massive sulfide deposits extends for over 150 km along the southern margin of the Yukon-Tanana terrane of the eastern Alaska Range. Located north of the Denali fault, the Yukon-Tanana terrane forms a major basement unit in east-central Alaska. The volcanogenic massive sulfide deposits are primarily in...
Natural gas hydrates of the Prudhoe Bay and Kuparuk River area, North Slope, Alaska
Timothy S. Collett
1993, American Association of Petroleum Geologists Bulletin (77) 793-812
Gas hydrates are crystalline substances composed of water and gas, mainly methane, in which a solid-water lattice accommodates gas molecules in a cage-like structure, or clathrate. These substances commonly have been regarded as a potential unconventional source of natural gas because of their enormous gas-storage capacity. Significant quantities of naturally...
Stratigraphic Context of Old Crow Tephra, Holitna Lowland, Interior Southwest Alaska
C. F. Waythomas, P.D. Lea, R.C. Walter
1993, Quaternary Research (40) 20-29
A thick deposit of Old Crow tephra was discovered in a bluff exposure along the middle Holitna River near the Kulukbuk Hills (61??20???N latitude, 157??10???W longitude) in interior southwest Alaska. This locality is the southwesternmost-known deposit of Old Crow tephra in Alaska. Thickness and grain-size data from this site support...
Status and ecology of kittiwakes (Rissa tridactyla and R. brevirostris) in the North Pacific
Scott A. Hatch, G.V. Byrd, D.B. Irons, G.L. Hunt Jr.
Kees Vermeer, K.T. Briggs, K.H. Morgan, D. Siegel-Causey, editor(s)
1993, Conference Paper, The status, ecology and conservation of marine birds of the North Pacific
Black-legged Kittiwakes (Rissa tridactyla) are widely distributed in the subarctic North Pacific and adjacent seas, with a total breeding population of about 2.6 million individuals. Red-legged Kittiwakes (R. brevirostris) breed in four locations, and at least 95% of their estimated world population of 230,000 birds nest on one island (St....
Cytonuclear genetic architecture in mosquitofish populations and the possible roles of introgressive hybridization
Kim T. Scribner, John C. Avise
1993, Molecular Ecology (2) 139-149
Spatial genetic structure in populations of mosquitofish (Gambusia) sampled throughout the south-eastern United States was characterized using mitochondrial (mt) DNA and allozyme markers. Both sets of data revealed a pronounced genetic discontinuity (along a broad path extending from south-eastern Mississippi to north-eastern Georgia) that corresponds to a recently recognized distinction...
Are Bald Eagles important predators of Emperor Geese?
Robert E. Gill Jr., Karen L. Kincheloe
1993, Journal of Raptor Research (27) 34-36
Bald Eagles (Haliaeetus leucocephalus) and geese often occur together, especially at sites used by geese for migrational staging and wintering. Although numerous studies have been directed at these taxa, there are only anecdotal accounts (Parris et al. 1980, Bennett and Klaas 1986, Bartley 1988) of Bald Eagles killing healthy geese...
An earth remote sensing satellite- 1 Synthetic Aperture Radar Mosaic of the Tanana River Basin in Alaska
Charles E. Wivell, Coert Olmsted, Daniel R. Steinwand, Christopher Taylor
1993, Photogrammetric Engineering and Remote Sensing (59) 527-528
Because the pixel location in a line of Synthetic Aperture Radar (SAR) image data is directly related to the distance the pixel is from the radar, terrain elevations cause large displacement errors in the geo-referenced location of the pixel. This is especially true for radar systems with small angles between...
Factors influencing depredation of artificial duck nests
Daniel Esler, J. Barry Grand
1993, Journal of Wildlife Management (57) 244-248
Because artificial nests can facilitate controlled experiments of nest success, we used them to assess whether human visitation, nest density, vegetation structure, and proximity to habitat edge could affect depredation of duck nests on Yukon Flats National Wildlife Refuge, Alaska. More (P < 0.01) nests in a plot visited daily...
Life history strategies and habitat needs of the black brant
Dirk V. Derksen, David H. Ward
1993, Fish and Wildlife Leaflet 3.1.15
The black brant is a sea goose that depends on coastal habitats from high arctic nesting sites in Canada, Alaska, and Russia to wintering areas in the Pacific coastal states, the Baja California peninsula, and mainland Mexico estuaries. Population estimates are based on aerial surveys in Mexico, California, Oregon, and...
Status of Pacific Black Brant Branta bernicla nigricans on Wrangel Island, Russian Federation
David H. Ward, Dirk V. Derksen, Sergei Kharitonov, Mikhail Stishov, Vasily V. Baranyuk
1993, Wildfowl (44) 39-48
Abundance, distribution, and habitat selection of breeding and moulting Pacific Black Brant were studied on Wrangel Island in 1989-91. Two nests and <10 family flocks of Brant were found during ground searches in previously known nesting areas. The breeding population has declined from 1000-2000 pairs to probably <100 pairs. An...
Current status and recent dynamics of the Black Brant Branta bernicla breeding population
James S. Sedinger, Calvin J. Lensink, David H. Ward, Michael W. Anthony, Michael L. Wege, G. Vernon Byrd
1993, Wildfowl (44) 39-48
We summarize current knowledge about the distribution of Pacific Black Brant and recent dynamics of colonies, particularly on the Yukon-Kuskokwim (Y-K) Delta, Alaska. About 20,000 nests are required to produce the number of young in the autumn flight using estimates of clutch size, hatching success and gosling survival based on...
