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Page 5380, results 134476 - 134500

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Electric fences to reduce mammalian predation on waterfowl nests
J. T. Lokemoen, Harold A. Doty, D.E. Sharp, J.E. Neaville
1982, Wildlife Society Bulletin (10) 318-323
We evaluated electric fences as predator barriers to reduce high losses of waterfowl nests to mammalian predation at Waterfowl Production Areas (WPAs). The work was done in 1978-81 on 3 paired sites in central North Dakota and western Minnesota. Resident mammalian predators were trapped from inside the exclosures. All 3...
Analytical electron microscopy in mineralogy; exsolved phases in pyroxenes
Gordon L. Nord Jr.
1982, Ultramicroscopy (8) 109-119
Analytical scanning transmission electron microscopy has been successfully used to characterize the structure and composition of lamellar exsolution products in pyroxenes. At operating voltages of 100 and 200 keV, microanalytical techniques of x-ray energy analysis, convergent-beam electron diffraction, and lattice imaging have been used to chemically and...
Refining Landsat classification results using digital terrain data
Wayne A. Miller, Mark Shasby
1982, Journal of Applied Photographic Engineering (8) 35-40
 Scientists at the U.S. Geological Survey's Earth Resources Observation systems (EROS) Data Center have recently completed two land-cover mapping projects in which digital terrain data were used to refine Landsat classification results. Digital ter rain data were incorporated into the Landsat classification process using two different procedures that required developing...
The availability of conventional forms of remotely sensed data
James A. Sturdevant, Thomas M. Holm
1982, Journal of Applied Photographic Engineering (8) 153-158
For decades Federal and State agencies have been collecting aerial photographs of various film types and scales over parts of the United States. More recently, worldwide Earth resources data acquired by orbiting satellites have inundated the remote sensing community. Determining the types of remotely sensed data that are publicly available...
Working group on the “adequate minimum” V=volcanic observatory
R.I. Tilling
1982, Earthquake Information Bulletin (USGS) (14) 185-185
A working group consisting of R. I. Tilling (United States, Chairman), M. Espendola (Mexico), E. Malavassi (Costa Rica), L. Villari (Italy), and J.P Viode (France) met on the island of Guadeloupe on February 20, 1981, to discuss informally the requirements for a "Minimum" volcano observatory, one which would have the...
Breeding-ground habitat conditions and the survival of mallards
James D. Nichols, Richard S. Pospahala, James E. Hines
1982, Journal of Wildlife Management (46) 80-87
The relationship between habitat conditions in prairie breeding areas of North America and mallard (Anas platyrhynchos) survival rates was investigated. Annual survival-rate estimates for mallards generally were higher during years of high May pond numbers and low mallards-per-pond ratios than during years of low pond numbers and high ratios. This...
Variability in nest survival rates and implications to nesting studies
A.T. Klett, Douglas H. Johnson
1982, The Auk (99) 77-87
We used four reasonably large samples (83-213) of Mallard (Anas platyrhynchos) and Blue-winged Teal (A. discors) nests on an interstate highway right-of-way in southcentral North Dakota to evaluate potential biases in hatch-rate estimates. Twelve consecutive, weekly searches for nests were conducted with a cable-chain drag in 1976 and 1977. Nests...
Portable precision dc voltage-current transfer standard for electrometer calibration
G. Landis, M. Godwin
1982, Review of Scientific Instruments (53) 1290-1291
A circuit design is presented for an instrument providing a highly stable and fully adjustable voltage and current in the range of 0-1.999 V or 0-199.9 mV and 10-11-10-15 A. This instrument is used to verify the calibration and performance of dc and vibrating reed electrometers and chart recorders on...
Recurrence, mortality, and dispersal of prairie striped skunks, Mephitis mephitis, and implications to rabies epizootiology
A.B. Sargeant, R. J. Greenwood, J.L. Piehl, W.B. Bicknell
1982, Canadian Field-Naturalist (96) 312-316
Detailed study of radio-equipped individuals of the Striped Skunk (Mephitis mephitis) in a North Dakota population provided insight into possible mechanisms for spread of rabies during spring and summer. Annual recurrence rates of 138 skunks marked on a study area averaged 11% for adult males, 43% for adult females and...
Chlamydiosis in 2 biologists investigating disease occurrences in wild waterfowl
Gary Wobeser, Christopher J. Brand
1982, Wildlife Society Bulletin (10) 170-172
Chlamydiosis (ornithosis, psittacosis) is an infectious disease of birds that can be transmitted to humans. Human infections are probably acquired by inhalation of aerosols containing elementary bodies of the causative agent Chlamydia psittaci, from bird droppings, or from tissues. Infected birds do not have to be ill to transmit the...
Methanogenesis and sulfate reduction: Competitive and noncompetitive substrates in estuarine sediments
Ronald S. Oremland, Sandra Polcin
1982, Applied and Environmental Microbiology (44) 1270-1276
Sulfate ions did not inhibit methanogenesis in estuarine sediments supplemented with methanol, trimethylamine, or methionine. However, sulfate greatly retarded methanogenesis when hydrogen or acetate was the substrate. Sulfate reduction was stimulated by acetate, hydrogen, and acetate plus hydrogen, but not by methanol or trimethylamine. These results indicate that sulfate-reducing bacteria...
Sedimentology and stratigraphy of the Kanayut Conglomerate, central and western Brooks Range, Alaska: Report of 1981 field season
T. H. Nilsen, Thomas E. Moore
1982, Open-File Report 82-674
The Upper Devonian and Lower Mississippian(?) Kanayut Conglomerate forms a major stratigraphic unit along the crest of the Brooks Range of northern Alaska. It crops out for an east-west distance of about 900 km and a north-south distance of about 65 km. The Kanayut is wholly allochthonous and has probably...
Fish cell culture
K. Wolf, W. Ahne
K. Maramorosch, editor(s)
1982, Book chapter, Advances in Cell Culture: Volume 2
No abstract available at this time...
Fish hatchery management
R. G. Piper, I.B. McElwain, L.E. Orme, J. P. McCraren, L.G. Fowler, J.R. Leonard
1982, Book
No abstract available at this time...