Arctic nesting geese: Alaskan populations
Jerry W. Hupp, Robert A. Stehn, Craig R. Ely, Dirk V. Derksen
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
North American populations of most goose species have remained stable or have increased in recent decades (USFWS and Canadian Wildlife Service 1986). Some populations, however, have declined or historically have had small numbers of individuals, and thus are of special concern. Individual populations of geese should be maintained to ensure...
Northern Pintail (Anas acuta)
J. E. Austin, M. R. Miller
A. Poole, F. Gill, editor(s)
1995, Book chapter, The Birds of North America
The Northern Pintail is a medium-sized dabbling duck of slender, elegant lines and conservative plumage coloration. It is circumpolar in distribution and abundant in North America, with core nesting habitat in Alaska and the Prairie Pothole Region of southern Canada and the northern Great Plains. Breeders favor shallow wetlands interspersed...
Sea otters in the northern Pacific Ocean
James L. Bodkin, Ronald J. Jameson, James A. Estes
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
About 250 years ago sea otters (Enhydra lutris) were distributed continuously from central Baja California, north and west along the Pacific Rim to Machatka Peninsula in Russia, and south along the Kuril Island to northern Japan (Kenyon 1969; Fig. 1a). Several hundred thousand sea otters may have occurred in the...
ENSO events in the northern Gulf of Alaska, and effects on selected marine fisheries
K.M. Bailey, S.A. Macklin, R.K. Reed, R.D. Brodeur, W.J. Ingraham, John F. Piatt, M. Shima, R.C. Francis, P.J. Anderson, T.C. Royer, A. Hollowed, D.A. Somerton, W.S. Wooster
1995, Report
The 1991-93 El Nino-Southern Oscillation (ENSO) event first appeared in the northern Gulf of Alaska in autumn 1991 with warm sea-surface temperatures. In winter 1992, there were pulses of increased sea level and anomalous circulation. El Nino conditions persisted at least through summer 1993. The effects of this ENSO event...
Seismic images of the Brooks Range, Arctic Alaska, reveal crustal- scale duplexing
G. S. Fuis, A. R. Levander, W. J. Lutter, E. S. Wissinger, Thomas E. Moore, N.I. Christensen
1995, Geology (23) 65-68
An integrated set of seismic reflection and refraction data collected across the Brooks Range, Arctic Alaska, in 1990, has yielded a composite image of this Mesozoic and Cenozoic fold-and-thrust belt that reveals duplexing to lower-crustal depths. Interpretations from this image are as follows....
Black bear damage to lodgepole pine in central Oregon
V.G. Barnes Jr., R.M. Engeman
1995, Northwestern Naturalist (76) 127-129
Black bear damage to 108 lodgepole pine trees was found in mixed conifer habitat in central Oregon. No trees of three other conifer species were injured. Eighty-nine percent of the damage occurred in the same year. Nearly 20% of the freshly...
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...
Movements, distribution, and population dynamics of polar bears in the Beaufort Sea
Steven C. Amstrup
1995, Thesis
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....
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...
Rapid toluene mineralization by aquifer microorganisms at Adak, Alaska: Implications for intrinsic bioremediation in cold environments
P. M. Bradley, F. H. Chapelle
1995, Environmental Science & Technology (29) 2778-2781
No abstract available. ...
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...
Genetic variation in domestic reindeer and wild caribou in Alaska
M. Cronin, L. Renecker, Barbara J. Pierson, J.C. Patton
1995, Animal Genetics (26) 427-434
Reindeer were introduced into Alaska 100 years ago and have been maintained as semidomestic livestock. They have had contact with wild caribou herds, including deliberate cross-breeding and mixing in the wild. Reindeer have considerable potential as a domestic animal for meat or velvet antler production, and wild caribou are important...
Automated counting of waterfowl with image processing
D.J. Cunningham, W.H. Anderson, R.M. Anthony
1995, Wildlife Society Bulletin (23) 345-346
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...
Lead poisoning of spectacled eiders (Somateria fischeri) and of a common eider (Somateria mollissima) in Alaska
J. Christian Franson, Margaret R. Petersen, Carol U. Meteyer, Milton R. Smith
1995, Journal of Wildlife Diseases (31) 268-271
Lead poisoning was diagnosed in four spectacled eiders (Somateria fischeri) and one common eider (Somateria mollissima) found dead or moribund at the Yukon Delta National Wildlife Refuge, Alaska (USA) in 1992, 1993, and 1994. Ingested lead shot was found in the lower esophagus of one spectacled eider and in the...
Simulation of interaction between ground water in an alluvial aquifer and surface water in a large braided river
S. A. Leake, M. R. Lilly
1995, Conference Paper, International Symposium on Groundwater Management - Proceedings
The Fairbanks, Alaska, area has many contaminated sites in a shallow alluvial aquifer. A ground-water flow model is being developed using the MODFLOW finite-difference ground-water flow model program with the River Package. The modeled area is discretized in the horizontal dimensions into 118 rows and 158 columns of approximately 150-meter...
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...
GIS for mapping waterfowl density and distribution from aerial surveys
W.I. Butler, R.A. Stehn, G.R. Balogh
1995, Wildlife Society Bulletin (23) 140-147
We modified standard aerial survey data collection to obtain the geographic location for each waterfowl observation on surveys in Alaska during 1987-1993. Using transect navigation with CPS (global positioning system), data recording on continuously running tapes, and a computer data input program, we located observations with an average deviation along...
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...
Locating waterfowl observations on aerial surveys
W.I. Butler, J.I. Hodges, R.A. Stehn
1995, Wildlife Society Bulletin (23) 148-154
We modified standard aerial survey data collection to obtain the geographic location for each waterfowl observation on surveys in Alaska during 1987-1993. Using transect navigation with CPS (global positioning system), data recording on continuously running tapes, and a computer data input program, we located observations with an average deviation along...
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...
Estimating populations of nesting brant using aerial videography
R. Michael Anthony, W.H. Anderson, J.S. Sedinger, L.L. McDonald
1995, Wildlife Society Bulletin (23) 80-87
We mounted a video camcorder in a single-engine aircraft to estimate nesting density along 10-m wide strip transects in black brant colonies on the Yukon Delta National Wildlife Refuge, Alaska during 1990-1992. A global positioning system (GPS) receiver was connected...
Vegetation management for reducing mortality of ponderosa pine seedlings from Thomomys spp
Richard M. Engeman, Victor G. Barnes Jr., Richard M. Anthony, Heather W. Krupa
1995, Crop Protection (14) 505-508
The effects of vegetation management on Mazama pocket gopher activity and damage to ponderosa pine seedlings were studied using atrazine herbicide to alter the habitat. Atrazine treatments were applied to a large treatment unit and observed effects were compared to an untreated control unit. The greatly reduced forb and grass...
Sea otters and kelp forests in Alaska: Generality and variation in a community ecological paradigm
J. A. Estes, D. O. Duggins
1995, Ecological Monographs (65) 75-100
Multiscale patterns of spatial and temporal variation in density and population structure were used to evaluate the generality of a three—trophic—level cascade among sea otters (Enhydra lutris), invertebrate herbivores, and macroalgae in Alaska. The paradigm holds that where sea otters occur herbivores are rare and plants are abundant, whereas when...
