Nest-site selection by Emperor Geese and Cackling Canada Geese
Margaret R. Petersen
1990, The Wilson Bulletin (102) 413-426
Differences were found in habitat structure between nest sites of Emperor Geese (Chen canagicus) and Cackling Canada Geese (Branta canadensis minima) during a 5-year study (1982-1986) at Kokechik Bay, Alaska. Emperor Geese tended to select sites that afforded concealment from avian predators before incubation began. Cackling Canada Geese tended to...
Procedures and rationale for marking sea otters captured and treated during the T/V Exxon Valdez oil spill
A.R. DeGange, T.D. Williams
Keith Bayha, Jennifer Kormendy, editor(s)
1990, Biological Report 90(12)
Four methods were used for marking sea otters (Enhydra lutris) captured and treated during the response to the T/V Exxon Valdez oil spill. Colored and numbered flipper tags were placed on each sea otter that was brought to the otter treatment centers. These tags allowed individual recognition and permitted the...
Error in telemetry studies: Effects of animal movement on triangulation
Joel A. Schmutz, Gary C. White
1990, Journal of Wildlife Management (54) 506-510
We used Monte Carlo simulations to investigate the effects of animal movement on error of estimated animal locations derived from radio-telemetry triangulation of sequentially obtained bearings. Simulated movements of 0-534 m resulted in up to 10-fold increases in average location error but <10% decreases in location precision when observer-to-animal distances...
Brood habitat use of Rio Grande wild turkeys
Joel A. Schmutz, Clait E. Braun, William F. Andelt
1990, Prairie Naturalist (22) 177-184
Habitat use of 14 Rio Grande wild turkey (Meleagris gallopavo) broods was studied in riparian habitats in northeast Colorado in 1986-87. Of 191 locations, 78% were within the riparian zone, 11 % in agricultural uplands, and 11 % on the edge between these habitats. Use of habitats was dependent on...
Site 766
Leg 123 Shipboard Scientific Party
1990, Proceedings of the Ocean Drilling Program: Initial Reports (123) 269-352
No abstract available....
Site 765: Sedimentology
Leg 123 Shipboard Scientific Party
1990, Proceedings of the Ocean Drilling Program: Initial Reports (123) 113
Various techniques were used to decipher the sedimentation history of Site 765, including Markov chain analysis of facies transitions, XRD analysis of clay and other minerals, and multivariate analysis of smear-slide data, in addition to the standard descriptive procedures employed by the shipboard sedimentologist. This chapter presents brief summaries of...
Site 765: Sediment Lithostratigraphy
Leg 123 Shipboard Scientific Party
1990, Proceedings of the Ocean Drilling Program: Initial Reports (123) 76-94
A 935-m-thick succession of Quaternary through Lower Cretaceous sediments was recovered at Site 765 (Fig. 10). A single core of Quaternary sediment was obtained from Hole 765A; drilling terminated and a new hole was drilled in an attempt to establish the mud line. Quaternary through middle Miocene sediments were cored...
Effects of human disturbance on breeding Least and Crested Auklets at St. Lawrence Island, Alaska
John F. Piatt, Bay D. Roberts, Wayne W. Lidster, John L. Wells, Scott A. Hatch
1990, The Auk (107) 342-350
We studied breeding success, chick growth, and diets of Least (Aethia pusilla) and Crested (A. cristatella) auklets on St. Lawrence Island, Alaska, in summer 1987. Least Auklets had higher breeding success on control plots (50-66%) than on disturbed plots (36%). Crested Auklets had a breeding success of 42% on disturbed...
Seasonal movements of adult female polar bears in the Bering and Chukchi seas
Gerald W. Garner, Steven T. Knick, David C. Douglas
1990, Bears: Their Biology and Management (8) 219-226
Ten adult female polar bears (Ursus maritimus) were fitted with satellite telemetry collars during March 1986 in the Kotzebue Sound area of the Chukchi Sea. During March-April 1987, 2 of these bears were refitted with satellite telemetry collars and an additional 10 adult females were collared in the northern Bering...
Tracking wildlife by satellite: Current systems and performance
Richard B. Harris, Steven G. Fancy, David C. Douglas, Gerald W. Garner, Steven C. Amstrup, Thomas R. McCabe, Larry F. Pank
1990, Fish and Wildlife Technical Report 30
Since 1984, the U.S. Fish and Wildlife Service has used the Argos Data Collection and Location System (DCLS) and Tiros-N series satellites to monitor movements and activities of 10 species of large mammals in Alaska and the Rocky Mountain region. Reliability of the entire system was generally high. Data were...
Eruptions of Mount St. Helens : Past, present, and future
Robert I. Tilling, Lyn J. Topinka, Donald A. Swanson
1990, Report
Mount St. Helens, located in southwestern Washington about 50 miles northeast of Portland, Oregon, is one of several lofty volcanic peaks that dominate the Cascade Range of the Pacific Northwest; the range extends from Mount Garibaldi in British Columbia, Canada, to Lassen Peak in northern California. Geologists call Mount St....
Regional vertical tectonic displacement of shorelines in south- central Alaska during and between great earthquakes
George Plafker
1990, Northwest Science (64) 250-258
Reviews the setting of the 1964 earthquake and the unprecedented tectonic deformation that accompanied it. Outlines research directed towards defining the deformation that occurs between great earthquakes (interseismic part of the seismic cycle) and the longterm history of deformation over repeated seismic cycles in the earthquake-affected region, emphasizing work in...
Kilbuck terrane: Oldest known rocks in Alaska
S. E. Box, E. J. Moll-Stalcup, J. L. Wooden, J.Y. Bradshaw
1990, Geology (18) 1219-1222
The Kilbuck terrane in southwestern Alaska is a narrow, thin crustal sliver or flake of amphibolite facies orthogneiss. The igneous protolith of this gneiss was a suite of subduction-related platonic rocks. U-Pb data on zircons from trondhjemitic and granitic samples yield upper-intercept (igneous)...
Flexible time budgets in breeding Common Murres: Buffers against variable prey availability
A.E. Burger, John F. Piatt
1990, Studies in Avian Biology (14) 71-83
Mortality rates of canvasbacks were estimated from band-recovery records. The annual rate of mortality of immatures during the first year was 77 per cent. Annual mortality rates of adults ranged from 35 to 50 per cent. Mortality rates of females were higher than those of males. Relatively larger numbers of...
Molluscan evidence for early middle Miocene marine glaciation in southern Alaska
L. Marincovich Jr.
1990, Geological Society of America Bulletin (102) 1591-1599
Profound cooling of Miocene marine climates in southern Alaska culminated in early middle Miocene coastal marine glaciation in the northeastern Gulf of Alaska. This climatic change resulted from interaction of the Yakutat terrane with southern Alaska beginning in late Oligocene time. The ensuing...
The Hayes tephra deposits, and upper Holocene marker horizon in south-central Alaska
J.R. Riehle, P.M. Bowers, T. A. Ager
1990, Quaternary Research (33) 276-290
The most widespread of all Holocene tephra deposits in the Cook Inlet region of south-central Alaska is a set of deposits from Hayes volcano. Because of their unique phenocryst content-biotite in rare amounts and a high proportion of amphibole to pyroxene-the deposits are readily identifiable at all but the most...
Postrelease monitoring of radio-instrumented sea otters in Prince William Sound
C. Monnett, L.M. Rotterman, C. Stack, Daniel H. Monson
Keith Bayha, Jennifer Kormendy, editor(s)
1990, Biological Report 90(12)
Sea otters (Enhydra lutris) that were captured in western Prince William Sound (PWS) or the Gulf of Alaska, treated, and held in captivity at the temporary rehabilitation centers established in response to the T/V Exxon Valdez oil spill were instrumented with radio transmitters, released into eastern PWS, and monitored by...
Species profiles: Life histories and environmental requirements of coastal fishes and invertebrates (Pacific Northwest)--ghost and blue mud shrimp
S. Hornig, A. Sterling, Styles Smith
1989, U.S. Fish and Wildlife Service Biological Report Biological Report 82(11.93). U.S. Army Corps of Engineers, TR EL-82-4.
Geographic range: The ghost shrimp is found in intertidal areas along the west coast of North America from Mutiny Bay, Alaska, to the mouth of the Tijuana River, San Diego County, California; MacGinitie (1934) and Ricketts and Calvin (1968) reported finding specimens as far south as El Estuario de Punto...
Tundra ponds of the Yukon Delta, Alaska, and their macroinvertebrate communities.
J. A. Maciolek
1989, Hydrobiologia (172) 193-206
The Yukon Delta, a low alluvial tundra in western Alaska, has more than 105 thaw-basin ponds within its 70000 km2 area. In 1984 and 1985, 68 ponds in three interior areas of the Delta were surveyed to determine limnological features, macroinvertebrate fauna, and trophic character. Ponds ranged up to 90...
The evolution of forearc structures along an oblique convergent margin, central Aleutian Arc
Holly F. Ryan, D.W. Scholl
1989, Tectonics (8) 497-516
Multichannel seismic reflection data were used to determine the evolutionary history of the forearc region of the central Aleutian Ridge. Since at least late Miocene time this sector of the ridge has been obliquely underthrust 30° west of orthogonal convergence by the northwestward converging Pacific plate at a rate of...
United States National seismograph network
Robert P. Masse, J.R. Filson, A. Murphy
1989, Tectonophysics (167) 133-138
The USGS National Earthquake Information Center (NEIC) has planned and is developing a broadband digital seismograph network for the United States. The network will consist of approximately 150 seismograph stations distributed across the contiguous 48 states and across Alaska, Hawaii, Puerto Rico and the Virgin Islands. Data transmission will be...
Mineral resource assessment map of the Healy Quadrangle, Alaska
D. P. Cox, T.D. Light, Bea Csejtey, D. L. Campbell, Warren Yeend
1989, Miscellaneous Field Studies Map 2058-A
Bouguer gravity map of the Petersburg quadrangle and parts of the Port Alexander, Sitka, and Sumdum quadrangles, Alaska
D.F. Barnes, D. A. Brew, R. L. Morin
1989, Miscellaneous Field Studies Map 1970-A
North American Datum of 1983, map data conversion tables; Alaska
Water Resources Division, U.S. Geological Survey
1989, Bulletin 1875-C
Simulation of ground-water flow at Anchorage, Alaska, 1955-83
Leslie Patrick, T. P. Brabets, R. L. Glass
1989, Water-Resources Investigations Report 88-4139
The groundwater system at Anchorage, Alaska was analyzed by using a two-layer three-dimensional mathematical model. By use of existing data, both nonpumping and pumping steady-state conditions and transient conditions were simulated. Under steady-state conditions, calculated directions of groundwater flow were similar to observed flow patterns, and calculated stream discharges generally...
