High-pressure amphibolite facies dynamic metamorphism and the Mesozoic tectonic evolution of an ancient continental margin, east- central Alaska
Cynthia Dusel-Bacon, V. L. Hansen, J.A. Scala
1995, Journal of Metamorphic Geology (13) 9-24
Ductilely deformed amphibolite facies tectonites comprise two adjacent terranes in east-central Alaska: the northern, structurally higher Taylor Mountain terrane and the southern, structurally lower Lake George subterrane of the Yukon-Tanana terrane. The pressure, temperature, kinematic and age data are interpreted to indicate that the metamorphism of the Taylor Mountain terrane...
Landscape change and its effects on the wintering range of a lesser snow goose Chen caerulescens caerulescens population: A review
Donna G. Robertson, R. Douglas Slack
1995, Biological Conservation (71) 179-185
The Texas coast has experienced considerable urban, industrial, and agricultural growth during the 20th Century. The region provides important wintering habitat to many avian species, including lesser snow geese Chen caerulescens caerulescens. This paper draws the biological and ecological fields into an historical perspective by examining available literature on the...
Salmon escapement estimates into the Togiak River using sonar, Togiak National Wildlife Refuge, Alaska, 1987, 1988, and 1990
David B. Irving, James E. Finn, James P. Larson
1995, USFWS Alaska Fisheries Technical Report 31
We began a three year study in 1987 to test the feasibility of using sonar in the Togiak River to estimate salmon escapements. Current methods rely on periodic aerial surveys and a counting tower at river kilometer 97. Escapement estimates are not available until 10 to 14 days after the...
Movements of a polar bear from northern Alaska to northern Greenland
George M. Durner, Steven C. Amstrup
1995, Arctic (48) 338-341
Using satellite telemetry, we monitored the movements of an adult female polar bear (Ursus maritimus) as she traveled from the Alaskan Beaufort Sea coast to northern Greenland. She is the first polar bear known to depart the Beaufort Sea region for an extended period, and the first polar bear known...
Geologic framework of a transect of the central Brooks Range: Regional relations and an alternative to the Endicott Mountains allochthon
John S. Kelley, W. P. Brosge
1995, American Association of Petroleum Geologists Bulletin (79) 1087-1115
This paper evaluates the geologic framework and tectonic development of the central Brooks Range based on a transect through the range and Arctic foothills. A geologic cross section constructed through the transect is confirmed by comparing the retrodeformed section with the regional distribution of lithofacies in the central Brooks Range....
Ubiquitous tar balls with a California-source signature on the shorelines of Prince William Sound, Alaska
K.A. Kvenvolden, F. D. Hostettler, P.R. Carlson, J. B. Rapp, C. N. Threlkeld, A. Warden
1995, Environmental Science & Technology (29) 2684-2694
Although the shorelines of Prince William Sound still bear traces of the 1989 Exxon Valdez oil spill, most of the flattened tar balls that can be found today on these shorelines are not residues of Exxon Valdez oil. Instead, the carbon-isotopic and hydrocarbon-biomarker signatures of 61 tar ball samples, collected...
Block rotation in east-central Alaska: A framework for evaluating earthquake potential?
R.A. Page, George Plafker, H. Pulpan
1995, Geology (23) 629-632
Geologic and seismic data reveal a set of parallel, active, strike-slip faults in east-central Alaska between the Denali and Tintina fault systems. The faults strike northeast to north-northeast, at a high angle to the bounding dextral fault systems, and exhibit sinistral slip. We...
Clinical and clinical laboratory correlates in sea otters dying unexpectedly in rehabilitation centers following the Exxon Valdez oil spill
A.H. Rebar, T.P. Lipscomb, R.K. Harris, Brenda E. Ballachey
1995, Veterinary Clinical Pathology (32) 346-350
Following the Exxon Valdez oil spill, 347 oiled sea otters (Enhydra lutris) were treated in rehabilitation centers. Of these, 116 died, 94 within 10 days of presentation. Clinical records of 21 otters dying during the first 10 days of rehabilitation were reviewed to define the laboratory abnormalities and clinical syndromes...
Evidence of Emperor Geese breeding in Russia and staging in Alaska
Joel A. Schmutz, Alexander V. Kondratyev
1995, The Auk (112) 1037-1038
Emperor Geese (Chen canagica) breed primarily on the Yukon-Kuskokwim Delta, Alaska (Eisenhauer and Kirkpatrick 1977), but a small, poorly quantified proportion of the world's population is known to breed in the Russia Far East (Kistchinski 1976, 1988, Portenko 1981). Eisenhauer and Kirkpatrick (1977) stated that 80 to 90% of all...
Characteristics of vegetation phenology over the Alaskan landscape using AVHRR time-series data
Carl J. Markon, Michael D. Fleming, Emily F. Binnian
1995, Polar Record (31) 179-190
Advanced Very High Resolution Radiometer (AVHRR) satellite data were acquired and composited into twice-a-month periods from 1 May 1991 to 15 October 1991 in order to map vegetation characteristics of the Alaskan landscape. Unique spatial and temporal qualities of the AVHRR data...
Influence of temperature on incubation rates of coho salmon (Oncorhynchus kisutch) from ten Washington populations
John T. Konecki, Carol Ann Woody, Thomas P. Quinn
1995, Northwest Science (69) 126-132
Coho salmon from 10 Washington populations were incubated under controlled conditions to determine the levels of variation in time to hatch among populations and families within populations. The average incubation rate was somewhat slower than that estimated from a quantitative model derived from British Columbia populations, and was slightly faster...
Increasing frequency of plastic particles ingested by seabirds in the subarctic North Pacific
Martin D. Robards, John F. Piatt, Kenton D. Wohl
1995, Marine Pollution Bulletin (30) 151-157
We examined gut contents of 1799 seabirds comprising 24 species collected in 1988-1990 to assess the types and quantities of plastic particles ingested by seabirds in the subarctic waters of Alaska. Of the 15 species found to ingest plastic, most were surface-feeders (shearwaters, petrels, gulls) or plankton-feeding divers (auklets, puffins)....
Deposition and persistence of beachcast seabird carcasses
Thomas I. van Pelt, John F. Piatt
1995, Marine Pollution Bulletin (30) 794-802
Following a massive wreck of guillemots (Uria aalge) in late winter and spring of 1993, we monitored the deposition and subsequent disappearance of 398 beachcast guillemot carcasses on two beaches in Resurrection Bay, Alaska, during a 100 day period. Deposition of carcasses declined logarithmically with time after the original event....
Detection of sea otters in boat-based surveys of Prince William Sound, Alaska
Mark S. Udevitz, James L. Bodkin, Daniel P. Costa
1995, Marine Mammal Science (11) 59-71
Boat-based surveys have been commonly used to monitor sea otter populations, but there has been little quantitative work to evaluate detection biases that may affect these surveys. We used ground-based observers to investigate sea otter detection probabilities in a boat-based survey of Prince William Sound, Alaska. We estimated that 30%...
Survival of juvenile black brant during brood rearing
Paul L. Flint, James S. Sedinger, Kenneth H. Pollock
1995, Journal of Wildlife Management (59) 455-463
Survival of young is an important and poorly understood component of waterfowl productivity. We estimated survival of black brant (Branta bernicla nigricans) goslings during summers 1987-89 on the Yukon-Kuskokwim Delta, Alaska, to determine timing and magnitude of gosling mortality and to compare methods of estimating gosling survival. Eighty-two percent of...
Automated counting of waterfowl with image processing
D.J. Cunningham, W.H. Anderson, R.M. Anthony
1995, Wildlife Society Bulletin (23) 345-346
Population differentiation in Pacific salmon: local adaptation, genetic drift, or the environment?
Milo D. Adkison
1995, Canadian Journal of Fisheries and Aquatic Sciences (52) 2762-2777
Morphological, behavioral, and life-history differences between Pacific salmon (Oncorhynchus spp.) populations are commonly thought to reflect local adaptation, and it is likewise common to assume that salmon populations separated by small distances are locally adapted. Two alternatives to local adaptation exist: random genetic differentiation owing to genetic drift and founder...
Survival rates of radio-collared female polar bears and their dependent young
Steven C. Amstrup, George M. Durner
1995, Canadian Journal of Zoology (73) 1312-1322
Polar bears are hunted throughout most of their range. In addition to hunting, polar bears of the Beaufort Sea region are exposed to mineral and hydrocarbon extraction and related human activities such as shipping, road building, and seismic testing. As human...
Caribou calf mortality in Denali National Park, Alaska
Layne G. Adams, Francis J. Singer, Bruce W. Dale
1995, Journal of Wildlife Management (59) 584-594
Calf mortality is a major component of caribou (Rangifer tarandus) population dynamics, but little is known about the timing or causes of calf losses, or of characteristics that predispose calves to mortality. During 1984-87, we radiocollared 226 calves (≤3 days old) in the Denali Caribou Herd (DCH), an unhunted population...
Some tests of the "migration hypothesis" for anadromous Dolly Varden (southern form)
David R. Bernard, Kelley R. Hepler, J. Douglas Jones, Mary E. Whalen, Douglas N. McBride
1995, Transactions of the American Fisheries Society (124) 297-307
Some aspects of a previously described migratory paradigm for the southern form of anadromous Dolly Varden Salvelinus malma were investigated with seven 3‐year mark–recapture experiments on fish that used lakes in eight watersheds as their winter residence. Weirs on Kodiak Island, around Prince William Sound, and near Juneau, Alaska, were used to...
Effects of harness-attached transmitters on premigration and reproduction of Brant
David H. Ward, Paul L. Flint
1995, Journal of Wildlife Management (59) 39-46
Radio transmitters are an important tool in waterfowl ecology studies, but little is known about their effects on free-ranging geese. We attached transmitters to female brant (Branta bernicla nigricans) to investigate migration schedules at a fall staging area, return rates to nesting grounds, and nesting rates of returning females in...
Estimating prefledging survival: Allowing for brood mixing and dependence among brood mates
Paul L. Flint, Kenneth H. Pollock, Dana Thomas, James S. Sedinger
1995, Journal of Wildlife Management (59) 448-455
Estimates of juvenile survival from hatch to fledging provide important information on waterfowl productivity. We develop a model for estimating survival of young waterfowl from hatch to fledging. Our model enables interchange of individuals among broods and relaxes the assumption that individuals within broods have independent survival probabilities. The model...
Evaluating growth of the Porcupine Caribou Herd using a stochastic model
Noreen E. Walsh, Brad Griffith, Thomas R. McCabe
1995, Journal of Wildlife Management (59) 262-272
Estimates of the relative effects of demographic parameters on population rates of change, and of the level of natural variation in these parameters, are necessary to address potential effects of perturbations on populations. We used a stochastic model, based on survival and reproduction estimates of the Porcupine Caribou (Rangifer tarandus...
Morphological differences in Pacific Coast populations of greater white-fronted geese
D.L. Orthmeyer, John Y. Takekawa, Craig R. Ely, M. Wege, W.E. Newton
1995, Condor (97) 123-132
We examined morphological relationships of three Pacific coast populations of Greater White-fronted Geese (Anser albifrons). Adult geese were captured and measured at three breeding areas in Alaska and two wintering areas in California, 1980-1991. A two-step discriminant function analysis examined morphological differences among the three populations. Stepwise discriminant function procedures...
Nesting by Golden Eagles on the North Slope of the Brooks Range in Northeastern Alaska
Donald D. Young Jr., Carol L. McIntyre, Peter J. Bente, Thomas R. McCabe, Robert E. Ambrose
1995, Journal of Field Ornithology (66) 373-379
Twenty-two Golden Eagle (Aquila chrysaetos) nesting territories and 31 occupied eagle nests were documented on the north slope of the Brooks Range in northeastern Alaska, 1988-1990, in an area previously thought to be marginal breeding habitat for eagles. The mean number of young/successful nest was 1.25 in 1988, 1.27 in...
