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Page 230, results 5726 - 5750

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Dispersion of adult Cancer magister at Glacier Bay, Alaska: Variation with spatial scale, sex, and reproductive status
Charles E. O’Clair, Thomas C. Shirley, S. James Taggart
1996, Conference Paper, Proceedings of the international symposium on biology, management, and economics of crabs from high latitude habitats: Lowell Wakefield fisheries symposium
Patterns of micro- to mesoscale distribution of Dungeness crabs (Cancer magister) in nearshore habitats at five locations in and near Glacier Bay National Park were revealed using subtidal transects. Sampling was conducted in April and September 1992 and 1993 and April 1994. Divers censused crabs by sex and reproductive status...
Allocation of limited reserves to a clutch: A model explaining the lack of a relationship between clutch size and egg size
Paul L. Flint, J. Barry Grand, James S. Sedinger
1996, The Auk (113) 939-942
Lack (1967, 1968) proposed that clutch size in waterfowl is limited by the nutrients available to females when producing eggs. He suggested that if nutrients available for clutch formation are limited, then species producing small eggs would, on average, lay more eggs than species with large eggs. Rohwer (1988) argues...
Serological evidence of morbillivirus infection in polar bears (Ursus maritimus) from Alaska and Russia
Erich H. Follmann, G.W. Garner, Jim F. Evermann, McKeirnan
1996, Veterinary Record (138) 615-618
One-hundred-and-ninety-one samples of blood serum collected from 186 polar bears (Ursus maritimus) between 1987 and 1992 were analysed for morbillivirus antibodies. The samples were collected in the Bering, Chukchi and East Siberian seas. Sixty-eight samples (35.6 per cent) had morbillivirus antibody titres > 5; the percentage of positive samples ranged...
Population, reproduction, and foraging of pigeon guillemots at Naked Island, Alaska, before and after the Exxon Valdez Oil Spill
Karen L. Oakley, Kathy J. Kuletz
S.D. Rice, R.B. Spies, D.A. Wolfe, B.A. Wright, editor(s)
1996, Conference Paper, American Fisheries Society Symposium 18: Proceedings of the "Exxon Valdez Oil Spill Symposium"
After the 1989 Exxon Valdez oil spill in Prince William Sound, Alaska, we studied pigeon guillemots Cepphus columba breeding just 30 km from the grounding site. The postspill population was 43% smaller than the prespill population, but we could not attribute the entire decline to the spill because a decline...
How many seabirds were killed by the Exxon Valdez Oil Spill?
John F. Piatt, R. Glenn Ford
S.D. Rice, R.B. Spies, D.A. Wolfe, B.A. Wright, editor(s)
1996, Conference Paper, American Fisheries Society Symposium 18: Proceedings of the "Exxon Valdez Oil Spill Symposium"
After the Exxon Valdez oil spill of 24 March 1989, 36,115 dead seabirds were recovered from beaches and processed at morgues. Most or all of 1,888 live oiled seabirds brought to rehabilitation centers also died and about 3,260 oiled carcasses were never delivered to morgues. Of these 41,263 carcasses accounted...
Sea birds as proxies of marine habitats and food webs in the western Aleutian Arc
Alan M. Springer, John F. Piatt, Gus B. Van Vliet
1996, Fisheries Oceanography (5) 45-55
We propose that ocean conditions of the Near Islands in the western Aleutian Arc mimic those of the shallow continental shelf of the eastern Bering Sea to the extent that the marine community, including assemblages of forage fishes and their avian predators, has distinctly coastal characteristics. In contrast, marine avifauna...
Phylogenetic relationships within the Alcidae (Charadriiformes: Aves) inferred from total molecular evidence
Vicki L. Friesen, Allan J. Baker, John F. Piatt
1996, Molecular Biology and Evolution (13) 359-367
The Alcidae is a unique assemblage of Northern Hemisphere seabirds that forage by "flying" underwater. Despite obvious affinities among the species, their evolutionary relationships are unclear. We analyzed nucleotide sequences of 1,045 base pairs of the mitochondrial cytochrome b gene and allelic profiles for 37 allozyme loci in all 22...
Migration, fidelity, and use of autumn staging grounds in Alaska by Cackling Canada Geese Branta canadensis minima
Robert E. Gill Jr., Christopher Babcock, Colleen M. Handel, William R. Butler Jr., Dennis G. Raveling
1996, Wildfowl (47) 42-61
Cackling Canada Geese were studied annually (1985-88) on autumn migration staging areas in Alaska during a period of rapid population growth. Geese concentrated at two estuaries (Ugashik Bay and Cinder Lagoon) along the north side of the Alaska Peninsula. Birds arrived on the staging areas in late September, numbers peaked...
Mass and body-dimension relationships of polar bears in northern Alaska
George M. Durner, Steven C. Amstrup
1996, Wildlife Society Bulletin (24) 480-484
Models developed from morphometric parameters are useful for estimating body mass (M) of captured wild ursids. The accuracy of those models, however, may depend on sex, season, and geographic location of the population. We tested the suitability of reported models to predict mass of polar bears (Ursus maritimus) captured in...
Activity and feeding of ovigerous Dungeness crabs in Glacier Bay, Alaska
Deborah A. Schultz, Thomas C. Shirley, Charles E. O’Clair, S. James Taggart
1996, Conference Paper, Proceedings of the international symposium on biology, management, and economics of crabs from high latitude habitats: Lowell Wakefield fisheries symposium
The activity and feeding behavior of ovigerous Dungeness crabs, Cancer magister, were examined as part of a long-term study. Part of this study surveyed Bartlett Cove in Glacier Bay, Alaska, during the spring of 1994 where 50 commercial pots were soaked for 24 hours. Catch per unit effort (CPUE), dispersion,...
Volcano seismology, hazards assessment
J. Mori
1995, Reviews of Geophysics (33) 263-267
The last few years have seen several impressive examples of seismic monitoring at volcanoes to provide warnings that have saved lives and property. Changes in the rates and character of volcanic earthquakes provided precursory signs to explosive eruptions of moderate size at Redoubt volcano (Alaska), Mount Unzen (Japan), Mount Spurr...
Survival estimation and the effects of dependency among animals
Joel A. Schmutz, David H. Ward, James S. Sedinger, Eric A. Rexstad
1995, Journal of Applied Statistics (22) 673-681
Survival models assume that fates of individuals are independent, yet the robustness of this assumption has been poorly quantified. We examine how empirically derived estimates of the variance of survival rates are affected by dependency in survival probability among individuals. We used Monte Carlo simulations to generate known amounts of...
Heavy metals in seaducks and mussels from Misty Fjords National Monument in southeast Alaska
J. C. Franson, P.S. Koehl, D.V. Derksen, T.C. Rothe, C.M. Bunck, John F. Moore
1995, Environmental Monitoring and Assessment (36) 149-167
Quartz Hill, in Misty Fjords National Monument near Ketchikan, Alaska, is the site of a proposed molybdenum-producing mine. To provide baseline data for use in post-development comparisons, we analyzed tissues of Barrow's goldeneyes (Bucephala islandica), common mergansers (Mergus merganser), and blue mussels (Mytilus edulis) for seven heavy metals that could...
Pack structure and genetic relatedness among wolf packs in a naturally-regulated population
Thomas J. Meier, John W. Burch, L. David Mech, Layne G. Adams
Ludwig N. Carbyn, Steven H. Fritts, Dale R. Seip, editor(s)
1995, Occasional Publication of the Canadian Circumpolar Institute 35
Observations of wolf pack dynamics over a six-year period in Denali National Park and Preserve, Alaska, found high rates of intraspecific strife, wolf pack dissolution and new pack formation, and the acceptance of new wolves into established packs. These observations corroborate genetic studies that found more genetic links between packs,...
Patterns of prey selection by wolves in Denali National Park, Alaska
L. David Mech, T.J. Meier, John W. Burch, Layne G. Adams
Ludwig N. Carbyn, Steven H. Fritts, Dale R. Seip, editor(s)
1995, Occasional Publication of the Canadian Circumpolar Institute 35
The patterns of selection by wolves (Canis lupus) preying on moose (Alces alces), caribou (Rangifer tarandus), and Dall sheep (Ovis dalli) in Denali National Park and Preserve, Alaska were studied from 1986 through early 1992. Wolves and their prey are legally protected or relatively unharvested in most of the area,...
Wolves and caribou in Denali National Park, Alaska
Layne G. Adams, L. David Mech
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
Management of gray wolves (Canis lupus) and their prey in interior Alaska has been controversial for three decades (Harbo and Dean 1983). Recently, debate was rekindled with renewed interest in wolf control to bolster two populations of caribou (Rangifer tarandus). Our research in Denali National Park provides insights into the...
Colonial waterbirds
R. Michael Erwin
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
Colonial waterbirds, that is, seabirds (gulls, terns, cormorants, pelicans) and wading birds (herons, egrets, ibises), have attracted the attention of scientists, conservationists, and the public since the turn of the century when plume hunters nearly drove many species to extinction. The first national wildlife refuge at Pelican Island, Florida, was...
Seismic Sources and Recurrence Rates as Adopted by USGS Staff for the Production of the 1982 and 1990 Probabilistic Ground Motion Maps for Alaska and the Conterminous United States
Stanley L. Hanson, David M. Perkins
1995, Open-File Report 95-257
The construction of a probabilistic ground-motion hazard map for a region follows a sequence of analyses beginning with the selection of an earthquake catalog and ending with the mapping of calculated probabilistic ground-motion values (Hanson and others, 1992). An integral part of this process is the creation of sources used...