A field test of a winter pronghorn habitat suitability index model
J.G. Cook, Arthur W. Allen, M.J. Armbruster, L.L. Irwin
1984, Book, Eleventh biennial pronghorn antelope workshop
No abstract available....
The physical habitat simulation system for instream flow studies
Robert T. Milhous
1984, Book, Proceedings of Third Conference of ASCE: Computing in Civil Engineering
No abstract available....
Determination of hydraulic conductivity in three dimensions and its relation to dispersivity: Chapter D in Ground-water contamination by crude oil at the Bemidji, Minnesota, research site; US Geological Survey Toxic Waste--ground-water contamination study
1984, Water-Resources Investigations Report 84-4188-D
Recent investigations suggest that dispersion in aquifers is scale dependent and a function of the heterogeneity of aquifer materials. Theoretical stochastic studies indicate that determining hydraulic-conductivity variability in three dimensions is important in analyzing the dispersion process. Even though field methods are available to approximate hydraulic conductivity in three dimensions,...
Major carbon-14 deficiency in modern snail shells from southern Nevada springs
A.C. Riggs
1984, Science (224) 58-61
Carbon-14 contents as low as 3.3 ± 0.2 percent modern (apparent age, 27,000 years) measured from the shells of snails Melanoides tuberculatus living in artesian springs in southern Nevada are attributed to fixation of dissolved HCO3- with which the shells are in carbon isotope equilibrium. Recognition of the existence of such extreme deficiencies...
Avian cholera in the central and Mississippi flyways 1979-80
Christopher J. Brand
1984, Journal of Wildlife Management (48) 399-406
Waterfowl mortality from avian cholera during July 1979-May 1980 was widespread in the Central and Mississippi flyways, occurring in a wide variety of species and locations from nesting grounds of snow geese (Chen caerulescens) on Hudson Bay south to waterfowl wintering areas on the Texas coast and playa lakes region....
Discovery of two new large submarine canyons in the Bering Sea
Paul R. Carlson, Herman A. Karl
1984, Marine Geology (56) 159-179
The Beringian continental margin is incised by some of the world's largest submarine canyons. Two newly discovered canyons, St. Matthew and Middle, are hereby added to the roster of Bering Sea canyons. Although these canyons are smaller and not cut back into the Bering shelf like the five very large...
Ecological distribution and crude density of breeding birds on prairie wetlands
Harold A. Kantrud, Robert E. Stewart
1984, Journal of Wildlife Management (48) 426-437
Breeding populations of 28 species of wetland-dwelling birds other than waterfowl (Anatidae) were censused on 1,321 wetlands lying within the prairie pothole region of North Dakota. Ecological distribution and two crude measures of relative density were calculated for the 22 commonest species using eight wetland classes. Semipermanent wetlands supported nearly...
Habitat use by migrant sandhill cranes in Nebraska
Gary L. Krapu, D.E. Facey, E.K. Fritzell, Douglas H. Johnson
1984, Journal of Wildlife Management (48) 407-417
The principal spring staging areas of the midcontinent population of sandhill cranes (Grus canadensis) are along the Platte and North Platte rivers in south-central Nebraska. Most of these lands are privately owned and managed for corn and cattle production. Diurnal habitat use by radio-tagged cranes was primarily in cropland (55%),...
Comparative ability of northern pintails, gadwalls, and northern shovelers to metabolize foods
Michael R. Miller
1984, Journal of Wildlife Management (48) 362-370
Feeding trials were used to compare the ability of northern pintails (Anas acuta), gadwalls (A. strepera), and northern shovelers (A. clypeata) to metabolize energy from a turkey starter ration, alfalfa pellets, and common barnyardgrass (Echinochloa crusgalli) seeds. No differences (P > 0.05) were detected among the three species for any...
Wood duck and hooded merganser nesting on Arrowwood NWR, North Dakota
Harold A. Doty, F.B. Lee, A.D. Kruse, J.W. Matthews, John R. Foster, Phillip M. Arnold
1984, Journal of Wildlife Management (48) 577-580
No abstract available. ...
Observations on Cretaceous abyssal hills in the northeast Pacific
Stephen L. Eittreim, D.Z. Piper, H. Chezar, D.R. Jones, A. Kaneps
1984, Marine Geology (56) 41-64
An abyssal hills area of 50 × 60 km in the northeast Pacific was studied using bottom transponder navigation, closely spaced survey lines, and long-traverse oblique photography. The block-faulted north—south hills are bounded by scarps, commonly with 40° slopes. On these steep scarps sedimentation is inhibited and pillow basalts often...
Renesting by canvasbacks in southwestern Manitoba
Harold A. Doty, David L. Trauger, Jerome R. Serie
1984, Journal of Wildlife Management (48) 581-584
No abstract available. ...
Nest spacing, habitat selection, and behavior of waterfowl on Miller Lake Island, North Dakota
John T. Lokemoen, Harold F. Duebbert, David E. Sharp
1984, Journal of Wildlife Management (48) 309-321
The nesting behavior of a concentration of nesting mallards (Anas platyrhynchos) and gadwalls (A. strepera) was studied on a 4.5-ha island in Miller Lake, North Dakota, in 1977. A single 0.59-ha clump of thick shrub contained 225 simultaneously active mallard nests on 10 May. During the peak nesting period, mallard...
Refuge management analyses: levee alternatives at Clarence Cannon National Wildlife Refuge
Gregor T. Auble, David B. Hamilton, James E. Roelle
1984, Report
This report documents the results of a workshop that examined levee alternatives at Clarence Cannon National Wildlife Refuge. This refuge is located along the Mississippi River, approximately 50 miles north of St. Louis. It was purchased primarily for waterfowl maintenance. A levee providing flood protection from the Mississippi River has...
Cenozoic plate motions and the volcano-tectonic evolution of western Oregon and Washington
Ray E. Wells, David C. Engebretson, P. D. Snavely Jr., R. S. Coe
1984, Tectonics (3) 275-294
A refined northeast Pacific plate-motion model provides a framework for analysis of the Tertiary volcanic and tectonic history of western Oregon and Washington. We examine three possible models for the origin of the allochthonous Paleocene and Eocene oceanic basalt basement of the Coast Range: (1) accretion to the continent of...
Estimating the effect of hunting on annual survival rates of adult mallards
Kenneth P. Burnham, Gary C. White, David R. Anderson
1984, Journal of Wildlife Management (48) 350-361
Management programs for waterfowl populations include rationale for, and establishment of, hunting regulations. These programs rest partially on the results of scientific studies on the effect of harvest rates on annual survival rates. The evidence of this relationship has changed markedly since the mid-1970's, and it is not...
Determining fat digestibility in trout using a metabolic chamber
R.W. Ellis, R. R. Smith
1984, Progressive Fish-Culturist (46) 116-119
Fat digestibilities were determined in rainbow trout utilizing a metabolism chamber. Separate and quantitative fecal extracts were freeze dried and total lipids were extracted. Lipid digestibilities were comparable to those obtained by other methods (85‐91%). This method avoids problems due to leaching and the variable of accelerated passage through the...
Reply to comments by MacIntyre and Smith on: Partition equilibria of nonionic organic compounds between soil-organic matter and water
Cary T. Chiou, Paul E. Porter, Thomas D. Shoup
1984, Environmental Science & Technology (18) 295-297
No abstract available....
Fossils of hydrothermal vent worms from Cretaceous sulfide ores of the Samail ophiolite, Oman
R.M. Haymon, R.A. Koski, C. Sinclair
1984, Science (223) 1407-1409
Fossil worm tubes of Cretaceous age preserved in the Bayda massive sulfide deposit of the Samail ophiolite, Oman, are apparently the first documented examples of fossils embedded in massive sulfide deposits from the geologic record. The geologic setting of the Bayda deposit and the distinctive mineralogic and textural features of...
Research gaps in assessing wetland functions
J.H. Sather, P.J. Stuber
1984, Book, Transactions of the Forty-ninth North American Wildlife and Natural Resources Conference
No abstract available....
Rock avalanches caused by earthquakes: Source characteristics
D. K. Keefer
1984, Science (223) 1288-1290
Study of a worldwide sample of historical earthquakes showed that slopes most susceptible to catastrophic rock avalanches were higher than 150 meters and steeper than 25 degrees. The slopes were undercut by fluvial or glacial erosion, were composed of intensely fractured rock, and exhibited at least one other indicator of...
Geologic framework of nonmarine cretaceous-tertiary boundary sites, Raton Basin, New Mexico and Colorado
C. L. Pillmore, R.H. Tschudy, C. J. Orth, J. S. Gilmore, J.D. Knight
1984, Science (223) 1180-1183
Indium concentrations are anomalously high at the palynological Cretaceous-Tertiary boundary in fluvial sedimentary rocks of the lower part of the Raton Formation at several localities in the Raton Basin of New Mexico and Colorado. The iridium anomaly is associated with a thin bed of kaolinitic claystone in a discontinuous carbonaceous...
Recent studies indicate that major structures in northeastern Nevada and the Golconda thrust in north-central Nevada are of Jurassic or Cretaceous age
Keith B. Ketner
1984, Geology (12) 483-486
Geologic mapping recently completed in four areas of northeastern Nevada indicates that major folds and thrusts are of post-Early Triassic age and probably are Jurassic or Cretaceous. Previously published data for northeastern Nevada lead to, or permit, the same conclusion. Basinal deposits of Early Triassic age in the northern Adobe...
Comment and Reply on “Evidence for Late Devonian movement within the Roberts Mountains allochthon, Roberts Mountains, Nevada”: COMMENT
Keith B. Ketner
1984, Geology (12) 445-445
No abstract available....
Zinc- and Y-group-bearing senaite from St Peters Dome, and new data on senaite from Dattas, Minas Gerais, Brazil
Eugene E. Foord, William N. Sharp, J.W. Adams
1984, Mineralogical Magazine (48) 97-106
A Zn- and Y-group-bearing senaite, formulated as AM21O38 (Pb0.63Na0.46Ba0.11)Σ1.20(Ti14.64Zn1.74Y‒group REE0.70Mn0.38Nb0.20Sn0.03Zr0.03Th0.02)Σ20.9O38, a member of the crichtonite group, is a newly characterized phase associated with murataite at the St Peters Dome...
