Publications
USGS research activities relevant to Alaska have yielded more than 9400 historical publications. This page features some of the most recent newsworthy research findings.
Filter Total Items: 3091
Cytopathology and coagulopathy associated with viral erythrocytic necrosis in chum salmon Cytopathology and coagulopathy associated with viral erythrocytic necrosis in chum salmon
The 8-month cytopathologic progression of viral erythrocytic necrosis (VEN) disease in chum salmon Oncorhynchus keta is described. Single to multiple acidophilic, cytoplasmic viral inclusion bodies developed first in mature erythrocytes and then, within 1–2 months, all morphologically identifiable hemopoietic cell types contained VEN inclusions. Cytologic analysis indicated that...
Authors
John R. MacMillian, D. Mulcahy, M.L. Landolt
Pre-field study and mineral resource assessment of the Sleetmule quadrangle, southwestern Alaska Pre-field study and mineral resource assessment of the Sleetmule quadrangle, southwestern Alaska
No abstract available.
Authors
Marti L. Miller, H. E. Belkin, R. B. Blodgett, T. K. Bundtzen, J. W. Cady, R.J. Goldfarb, J. E. Gray, R. G. McGimsey, S. L. Simpson
Diurnal and seasonal patterns of colony attendance in the Northern Fulmar, Fulmarus glacialis Diurnal and seasonal patterns of colony attendance in the Northern Fulmar, Fulmarus glacialis
The annual cycle of Northern Fulmars (Fulmarus glacialis) in the western Gulf of Alaska includes about six months from mid-April to mid-October when birds are associated with land at the Semidi Islands. The pre-laying stage in five years was marked by recurrent peaks in attendance that included up to 90% of the population, and alternate periods of 2 to 12 days when the breeding ground...
Authors
Scott A. Hatch
Reproductive performance of Rio Grande wild turkeys Reproductive performance of Rio Grande wild turkeys
Frequency, magnitude, and timing of reproduction in Rio Grande Wild Turkey (Meleagris gallopavo intermedia) hens were studied in northeastern Colorado in 1986 and 1987. All adults (n = 12) and 95% (n = 20) of yearlings were known to attempt nesting. Adults initiated first nest attempts earlier than yearlings in 1987 but not 1986. Adults and yearlings did not differ in clutch size or...
Authors
Joel A. Schmutz, Clait E. Braun
Baleen whales and their prey in a coastal environment Baleen whales and their prey in a coastal environment
Patterns of abundance of humpback (Megaptera novaeangliae), fin (Balaenoptera physalus), and minke (Balaenoptera acutorostrata) whales are described in relation to the abundance of their primary prey, capelin (Mallotus villosus), during 1982–1985 at Witless Bay, Newfoundland. The abundance ratio of the three whale species was 10:1:3.5, respectively. Abundance of all whale species was...
Authors
John F. Piatt, David A. Methven, Alan E. Burger, Ruth L. McLagan, Vicki Mercer, Elizabeth Creelman
A comparison of instrumental dewatering methods for the separation and concentration of suspended sediment for subsequent trace element analysis A comparison of instrumental dewatering methods for the separation and concentration of suspended sediment for subsequent trace element analysis
A comparison involving both field and laboratory trials was performed to evaluate the utility of two continuous-flow centrifuges and a tangential-flow filtration system for dewatering suspended sediments for subsequent trace element analysis. Although recovery efficiencies for the various devices differ, the analytical results from the separated suspended sediments indicate that any of...
Authors
A. J. Horowitz, K. A. Elrick, R.C. Hooper
Techniques for shipboard surveys of marine birds Techniques for shipboard surveys of marine birds
We describe shipboard and small boat techniques used by the US Fish and Wildlife Service in Alaska to survey marine birds at sea. The basis is a 10-min, 300-m-wide, strip transect taken from a platform moving at a constant speed in a constant direction. Special routines, such as instantaneous counts of traveling birds, are explained to help reduce biases caused by factors such as varying...
Authors
Patrick J. Gould, Douglas J. Forsell
Exxon Valdez bird toll Exxon Valdez bird toll
No abstract available.
Authors
John F. Piatt, Calvin J. Lensink
Interpretation of exploration geochemical data from the Ugashik, Bristol Bay, and western Karluk quadrangles, Alaska Interpretation of exploration geochemical data from the Ugashik, Bristol Bay, and western Karluk quadrangles, Alaska
No abstract available.
Authors
S. E. Church, James G. Frisken, Frederic H. Wilson
ODP investigates Indian Ocean origins ODP investigates Indian Ocean origins
No abstract available.
Authors
F.M. Gradstein, J. Ludden
Summer production of coho salmon stocked in Mount St. Helens streams 3-6 years after the 1980 eruption Summer production of coho salmon stocked in Mount St. Helens streams 3-6 years after the 1980 eruption
We monitored habitat use and summer production of stocked underyearling coho salmon Oncorhynchus kisutch from 1983 to 1986 in three streams affected by the 1980 eruption of Mount St. Helens, Washington. Two streams were in the blast area and one was on a volcanic mudflow terrace, Midsummer water temperatures frequently exceeded presumed stressful thresholds and occasionally surpassed the...
Authors
P.A. Bisson, J.L. Nielsen, J.W. Ward
Channel hydraulics, habitat use, and body form of juvenile coho salmon, steelhead, and cutthroat trout in streams Channel hydraulics, habitat use, and body form of juvenile coho salmon, steelhead, and cutthroat trout in streams
Habitat use by juvenile coho salmon Oncorhynchus kisutch, steelhead Salmo gairdneri, and the coastal subspecies of cutthroat trout Salmo clarki clarki in small streams in western Washington was influenced by hydraulic characteristics of different types of channel units. Coho salmon preferred pools with average velocities less than 20 cm/s; very few fish were found in riffles with high...
Authors
P.A. Bisson, K. Sullivan, J.L. Nielsen