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: 2875
Channelization and livestock impacts on salmonid habitat and biomass in western Washington
No abstract available.
Authors
D.W. Chapman, E. Knudsen
Plaquing procedure for infectious hematopoietic necrosis virus
A single overlay plaque assay was designed and evaluated for infectious hematopoietic necrosis virus. Epithelioma papillosum carpio cells were grown in normal atmosphere with tris(hydroxymethyl)aminomethane- or HEPES (N-2-hydroxyethylpiperazine-N'-2-ethanesulfonic acid)-buffered media. Plaques were larger and formed more quickly on 1- to 3-day-old cell monolayers than on older monolayers. Cell cul
Authors
J.A. Burke, D. Mulcahy
Geological Survey research 1980
A summary of recent significant scientific and economic results accompanied by a list of geologic, hydrologic, and cartographic investigations in progress.
Authors
Observations of wing-feather molt and summer feeding ecology of Steller's Eiders at Nelson Lagoon, Alaska
The population size, moult chronology, food habits, and feeding behaviour of Steller's Eiders Polysticta stelleri were studied at Nelson Lagoon, Alaska from May to October 1977. Sub-adults were flightless from late July to late August and the adult males were flightless from late August to mid September. Adult females were rarely flightless at Nelson Lagoon but commonly flightless at Izembek Bay.
Authors
Margaret R. Petersen
Viral erythrocytic necrosis: Some physiological consequences of infection in chum salmon (Oncorhynchus keta)
Erythroid cells in chum salmon (Oncorhynchus keta) susceptible to infection with erythrocytic necrosis virus (ENV) were examined by light and electron microscopy. Cells of stages II, III, IV, V, and VI contained complete eyrthrocytic necrosis virions in the cytoplasm. Viruses closely resembling ENV were also detected in the nuclei of some erythroblasts. Some secondary consequences of ENV infection
Authors
John R. MacMillan, Daniel M. Mulcahy, Marsha L. Landolt
Two Cenozoic igneous events on the Alaska Peninsula: A section in Geological Survey research 1980
Potassium-argon dating work and geologic mapping in the Chignik and Sutwik Island quadrangles (loc. 23) by F. H. Wilson, R. L. Detterman, J. E. Case, M. E. Yount, and others (Wilson and others, 1978; Detterman and others, 1979) have shown the existence of two major Cenozoic igneous episodes on the Alaska Peninsula. These events range in age from Eocene to late Oligocene and from early Miocene and
Authors
Late Mesozoic and Cenozoic tectonics and the age of porphyry copper prospects: Chignik and Sutwik Island quadrangles, Alaska Peninsula
No abstract available.
Authors
Frederic H. Wilson
Dispersal and migratory patterns of San Francisco Bay produced herons, egrets, and terns
San Francisco Bay, California, including its fringing marshes, supports a large and diverse water related avifauna (Grinnell and Wythe 19271 Sibley 1952, Gill 1973, 1977). Certain of man's alterations of the Bay's shallower wetlands have resulted in increased habitat diversity which has allowed colonization by several species of birds including some colonial nesting species. The extensive dikes as
Authors
Robert E. Gill, L. Richard Mewaldt
Yolk formation in some Charadriiform birds
By counting and measuring the major ova of breeding birds at autopsy and combining these data with time intervals between ovipositions, rough estimates have been made of the time required to form yolk in some non-captive birds (King 1973). Direct studies have been made in domestic fowl (Gallus gallus var. domesticus; Gilbert 1972), turkeys (Meleagris galloparvo; Bacon and Cherms 1968), and Common
Authors
T.E. Roudybush, C.R. Grau, Margaret R. Petersen, D. G. Ainley, K.V. Hirsch, A.P. Gilman, S.M. Patten
Status and distribution of the California Clapper Rail (Rallus longirostris obsoletus)
No abstract available.
Authors
Robert E. Gill
Paleozoic rocks on the Alaska Peninsula: A section in The United States Geological Survey in Alaska: Accomplishments during 1978
Two small areas of middle Paleozoic limestone were discovered near Gertrude Creek, 16 km north of Becharof Lake on the Alaska Peninsula, during reconnaissance flying as part of the Alaska Mineral Resource Assessment Program (AMRAP) for the Alaska Peninsula. Previously, the only known occurrence of Paleozoic rocks on the Alaska Peninsula was a small exposure of middle Permian limestone on an island
Authors
Robert L. Detterman, James E. Case, Frederic H. Wilson
Pomarine jaeger preys on adult black-legged kittiwake
On 5 June 1977, while on a cruise in the decomposing pack ice in the Bering Sea, we observed a light phase Pomarine Jaeger (Stercorarius pomarinus) attack, kill and feed on an adult Black-legged Kittiwake (Rissa tridactyla), 1 of approximately 10 individuals within 20 m of the ship's stern. We did not observe the birds until 1 min after the initial attack and do not know if the kittiwake was sitti
Authors
George J. Divoky, Karen L. Oakley, H.R. Huber