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: 3110
A natural epizootic of infectious haematopoietic necrosis in imported Atlantic salmon, Salmo salar L., reared in the enzootic region A natural epizootic of infectious haematopoietic necrosis in imported Atlantic salmon, Salmo salar L., reared in the enzootic region
In June 1984, fry of Atlantic salmon, Salmo salar L., (0-3 g mean weight), being reared in a hatehery operated by the University of Washington, began to die and infectious haematopoietic necrosis (IHN) was diagnosed. A total of 40 000 fry were being held in 11 tanks. Mortality due to IHN was noticeable in three tanks, losses being heavy in one and moderate in two. Gross examination of...
Authors
D. Mulcahy, J. Wood
Past and present status of polar bears in Alaska Past and present status of polar bears in Alaska
No abstract available.
Authors
Steven C. Amstrup, Ian Stirling, J. Lentfer
Map and tables showing potassium-argon age determinations and selected major-element chemical analyses from the Circle quadrangle, Alaska Map and tables showing potassium-argon age determinations and selected major-element chemical analyses from the Circle quadrangle, Alaska
No abstract available.
Authors
Gregory D. DuBois, Frederic H. Wilson, Nora B. Shew
Later Paleozoic and Early Jurassic fossil ages from the McHugh Complex: A section in Geologic studies in Alaska by the U.S. Geological Survey during 1985 Circular 978 Later Paleozoic and Early Jurassic fossil ages from the McHugh Complex: A section in Geologic studies in Alaska by the U.S. Geological Survey during 1985 Circular 978
Late Mississippian through Early Pennsylvanian and Early Jurassic microfossils were collected from the type locality of the McHugh Complex (Clark, 1973) along the Seward Highway southeast of Anchorage (fig. 36). Radiolarians collected indicate that same of the oceanic rocks in the McHugh Complex are Early Jurassic in age. Conodonts extracted from a conglomerate clast are of Late...
Authors
Steven W. Nelson, Charles D. Blome, Anita G. Harris, Katherine M. Reed, Frederic H. Wilson
Occurrence of anadromous brown trout in two lower Columbia River tributaries Occurrence of anadromous brown trout in two lower Columbia River tributaries
No abstract available.
Authors
P.A. Bisson, J.L. Nielsen, M.W. Chilcote, B. A. Crawford, S.A. Leider
Geological literature of the Alaska Peninsula to 1985 Geological literature of the Alaska Peninsula to 1985
No abstract available.
Authors
Frederic H. Wilson, S.Z. Gajewski, L.A. Angeloni
Geologic studies in Alaska by the U.S. Geological Survey during 1985 Geologic studies in Alaska by the U.S. Geological Survey during 1985
This circular contains short reports about many of the geologic studies carried out in Alaska by the U.S. Geological Survey and cooperating agencies in 1985. The topics cover a wide range in scientific and economic interest. Separate bibliographic listings of published reports are included. These listings are: (1) data releases and folio components derived from the Alaska Mineral...
Marine birds Marine birds
In this chapter we review existing knowledge of marine birds in the Gulf of Alaska. Three estuarine systems in the Gulf provide critical habitat for migratory shorebirds and waterfowl: 1) the Stikine River Delta, 2) Cook Inlet, and 3) the Copper River Delta. Over 20 million waterbirds are estimated to use the latter system during spring migration. Western sandpipers, dunlin, and northern...
Authors
Anthony R. DeGange, Gerald A. Sanger
Alaska goose populations: Past, present and future Alaska goose populations: Past, present and future
Many people think Alaska remains a pristine wilderness and that wildlife populations are still at prehistoric levels. This very likely is not true for the 11 species and subspecies of geese that nest in Alaska. Large, widely dispersed populations of geese were observed near the turn of the century. Even in the early 1970s, it was estimated that Alaskan habitats were used by 915,000...
Authors
James G. King, Dirk V. Derksen
Research on polar bears in Alaska, 1983-1985 Research on polar bears in Alaska, 1983-1985
Research on the ecology and status of polar bear populations in Alaska has continued since 1967. Research was a joint U.S. Fish and Wildlife Service/Alaska Department of Fish and Game effort until passage of the Marine Mammal Protection Act in 1972, and has been largely a Federal effort since then. In 1985, Alaskan polar beer research continues to be carried out by the Research Division...
Authors
Steven C. Amstrup
Potassium-argon ages of volcanic rocks from near Ankara, Central Turkey Potassium-argon ages of volcanic rocks from near Ankara, Central Turkey
No abstract available.
Authors
Jay A. Ach, Frederic H. Wilson