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Page 5037, results 125901 - 125925

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Earthquake education
Henry Spall, editor(s)
1984, Earthquake Information Bulletin (USGS) (16) 23-23
[none]...
Chemical determination of particulate nitrogen in San Francisco Bay. Nitrogen: chlorophyll a rations in plankton
S.W. Hager, D.D. Harmon, A.E. Alpine
1984, Estuarine, Coastal and Shelf Science (19) 193-204
Particulate nitrogen (PN) and chlorophyll a (Chla) were measured in the northern reach of San Francisco Bay throughout 1980. The PN values were calculated as the differences between unfiltered and filtered (0·4 μm) samples analyzed using the UV-catalyzed peroxide digestion method. The Chla values were measured spectrophotometrically, with corrections made for phaeopigments. The...
Effects of freshwater exposure to arsenic trioxide on the parr-smolt transformation of coho salmon (Oncorhynchus kisutch)
J.W. Nichols, Gary Wedemeyer, F.L. Mayer, Walton W. Dickhoff, S.V. Gregory, W. T. Yasutake, S.D. Smith
1984, Environmental Toxicology and Chemistry (3) 143-149
The effects of chronic (6 months) exposure to arsenic trioxide in fresh water on the Parr-smolt transformation of coho salmon (Oncorhynchus kisutch) were evaluated. Exposure to 300 μg As/L (as As2O3) appeared to delay the onset of the normal increase in plasma thyroxine concentration and cause a transient reduction of...
Comparison of in vitro growth characteristics of ten isolates of infectious hematopoietic necrosis virus
D. Mulcahy, R.J. Pascho, C.K. Jenes
1984, Journal of General Virology (65) 2199-2207
Ten isolates of infectious haematopoietic necrosis from salmonid fishes of different locations on the West Coast of North America from California to Alaska were compared by plaque size, single-step growth curves at 15 and 18 °C, rate of appearance of cytopathic effects in cell cultures, and growth over a range...
Appearance and quantification of infectious hematopoietic necrosis virus in female sockeye salmon (Oncorhynchus nerka) during their spawning migration
D. Mulcahy, C.K. Jenes, R.J. Pascho
1984, Archives of Virology (80) 171-181
The incidence and amount of infectious hematopoietic necrosis (IHN) virus was determined in 10 organs and body fluids from each of 100 female sockeye salmon(Oncorhynchus nerka) before, during, and after their spawning migration into freshwater. Virus was found in high concentrations only in fish sampled during and after...
Adsorption to fish sperm of vertically transmitted fish viruses
D. Mulcahy, R.J. Pascho
1984, Science (225) 333-335
More than 99 percent of a vertically transmitted fish rhabdovirus, infectious hematopoietic necrosis virus, was removed from suspension in less than 1 minute by adsorption to the surface membrane of sperm from two genera of salmonid fishes. The vertically transmitted, infectious pancreatic necrosis virus adsorbed to a lesser degree, but...
Disease caused by environmental stressors
Gary Wedemeyer, C.P. Goodyear
O. Kinne, editor(s)
1984, Book chapter, Diseases of Marine Animals. Volume IV, Part 1: Introduction, Pisces
The use of the terms 'stress' and 'stressor' is sometimes inconsistent (e.g., Pickering, 1981). The term 'stressor' should be used to describe environmental or other factor intensities severe enough to require a compensatory response at any level of biological organization. A stressor is normally extrinsic. The term 'stress' indicates the...
Assessing the tolerance of fish and fish populations to environmental stress: The problems and methods of monitoring
Gary Wedemeyer, D. McLeay, C.P. Goodyear
V.W. Carins, P. V. Hodson, J. Nriagu, editor(s)
1984, Book chapter, Contaminant effects on fisheries
Environmental stress is an inescapable aspect of life in the aquatic environment. The chemical and physical demands of life underwater impose somewhat rigorous constraints on aquatic species (Smith, 1982a). Superimposed on such demands may be the additional. physiological constraints of particular ecological niches. It is true that aquatic species...
Wilderness mineral potential: Assessment of mineral-resource potential in U.S. Forest Service lands studied in 1964-1984: Volume 1
S.P. Marsh, S.J. Kropschot, R. G. Dickinson, editor(s)
1984, Professional Paper 1300-1
Under the provisions of the Wilderness Act (Public Law 88-577, September 3, 1964) and subsequent related legislation, the U.S. Geological Survey (USGS) and the U.S. Bureau of Mines (USBM) have been conducting mineral surveys of wilderness and primitive areas, and of other national forest lands being considered for wilderness designation....
Evaluation of the ground-water resources of coastal Georgia: preliminary report of the data available as of July 1983
Richard E. Krause
1984, Georgia Geologic Survey Information Circular 62
A compilation of ground-water data that have been collected for nearly 100 years in the coastal area of Georgia is presented in this report. The compilation of pertinent data indicates what information is available for use in the evaluation of the ground-water resources of the 13 counties of coastal Georgia....
Ground-water reconnaissance of the central Weber River area, Morgan and Summit Counties, Utah
Joseph S. Gates, Judy I. Steiger, Ronald T. Green
1984, Technical Publication 77
During July 1978 to June 1980, the U.S. Geological Survey conducted a reconnaissance of ground-water conditions and ground- and surface-water relationships in the central Weber River area. This reconnaissance was done in cooperation with the Utah Department of Natural Resources, Division of Water Rights.The study area is a series of...
Program activities of the U.S. Geological Survey
Water Resources Division, U.S. Geological Survey
1984, Report
The mission of the Geological Survey is to collect, organize, interpret, and publish information about the nation's energy, minerals, water, and land resources; and to determine the geologic structure of the United States and develop an understanding of earth processes and hydrologic principles....
The prevalence and pathogenicity of gizzard nematodes of the genera Amidostomum and Epomidiostomum (Trichostrongylidae) in the lesser snow goose (Chen caerulescens caerulescens)
B.N. Tuggle, John L. Crites
1984, Canadian Journal of Zoology (62) 1849-1852
Three species of trichostrongylid nematodes were removed from the gizzards of 25 lesser snow geese, Chen caerulescens caerulescens, collected at Winisk, Ont. A 100% prevalence of infection was noted in the sampled population with each bird harboring two or more of the following species: Epomidiostomum crami (prevalence, 92%; mean intensity,...