An evaluation of methods for measuring algal growth
W. Thomas Shoaf, Bruce W. Lium
1976, Journal of Research of the U.S. Geological Survey (4) 497-504
Algal growth was expressed as milligrams dry weight per litre with use of the electronic particle counter for determining cell number and cell volume. A gravimetric constant in milligrams dry weight per cubic micrometre was determined. This constant was applicable throughout the growth curve since there was a linear relationship...
High-level plateaus of the southeastern Beartooth Mountains, Montana and Wyoming: remnants of an exhumed sub-Cambrian marine plain
Frank S. Simons, Theodore J. Armbrustmacher
1976, Journal of Research of the U.S. Geological Survey (4) 387-396
The Beartooth Mountains of south-central Montana and northwestern Wyoming are a northwesterly trending high rugged range made up mainly of Precambrian metamorphic rocks. The southeastern part of the range is characterized by extensive high-altitude flat or gently rolling plateaus separated by deep glaciated canyons. The plateaus along the crest...
Thin-skinned tectonics and potential hydrocarbon traps: Illustrated by a seismic profile in the Valley and Ridge province of Tennessee
Leonard D. Harris
1976, Journal of Research of the U.S. Geological Survey (4) 379-386
Seismic data, although limited to a small part of the western half of the Valley and Ridge province in Tennessee, confirm that the structural style is thin-skinned and that there is a fundamental change from west to east in both the total section preserved and the structural complexities that exist...
Evaluation of three collecting methods for a reconnaissance of stream benthic invertebrates
K. V. Slack, J. W. Nauman, L. J. Tilley
1976, Journal of Research of the U.S. Geological Survey (4) 491-495
A 1-day reconnaissance of the Dietrich River, Alaska, included collection of benthic invertebrates. Three methods were used at each of five stations to increase sampling effectiveness and to evaluate each method. Chironomidae and Plecoptera comprised 91 percent of all individuals and 47 percent of all taxa in the combined faunal...
Simulation of forest changes related to hydrologic variables in the Atchafalaya River basin, Louisiana
M. E. Jennings, C. P. O’Neil
1976, Journal of Research of the U.S. Geological Survey (4) 481-489
Results of forest-trend modeling from one data set in the Atchafalaya River basin show that predicted forest acreage totals for 16 forest types agree within 30 percent of actual values in two-thirds of the comparisons. A forest-trend simulation model based on statistical regression relations of forest and hydrologic variables and...
Blood values of the canvasback duck by age, sex and season
R. M. Kocan, S.M. Pitts
1976, Journal of Wildlife Diseases (12) 341-346
Blood samples were obtained from canvasback ducklings from Manitoba and Saskatchewan and from immature and adult canvasbacks on the Mississippi River near LaCrosse, Wisconsin and the Chesapeake Bay. These samples were used to determine baseline data on red cell counts, hematocrit, total protein, glucose, cholesterol, hemaglobin and distribution of plasma...
Graphic and analytical methods for assessment of stream-water quality: Mississippi River in the Minneapolis-St Paul metropolitan area, Minnesota
Steven P. Larson, William B. Mann IV, Timothy Doak Steele, R. H. Susag
1976, Water-Resources Investigations Report 76-94
No abstract available....
Comparative membrane microviscosity of fish and mammalian rhabdoviruses studied by fluorescence depolarization
N.F. Moore, Y. Barenholz, P. E. McAllister, R.R. Wagner
1976, Journal of Virology (19) 275-278
The microviscosity of the hydrophobic region of the membrane of infectious hematopoietic necrosis virus was determined using fluorescence depolarization analysis of the probe 1,6-diphenyl-1,3,5-hexatriene and was found to be much lower at 37 C than that of another rhabdovirus, vesicular stomatitis virus. However, the microviscosity of this fish virus at...
Comparative susceptibility of Atlantic salmon (Salmo salar) to the enteric redmouth bacterium and Aeromonas salmonicida
G. L. Bullock, H. M. Stuckey, R. L. Herman, C. E. Smith
1976, Journal of Wildlife Diseases (12) 376-379
The bacterium causing enteric redmouth (ERM) and Aeromonas salmonicida were found to be equally pathogenic for fingerling Atlantic salmon (Salmo salar). Injection of 5 × 105 cells of ERM or A. salmonicida killed all salmon within 96 h. After a 30 min exposure to water-borne cells of the two test bacteria about one-half of the...
Residues of DDT and DDE in livers of waterfowl, northeastern Louisiana--1970-71
Donald H. White
1976, Pesticides Monitoring Journal (10) 2-3
A study was conducted to determine the levels of DDT and DDE in the livers of 10 species of waterfowl collected in Louisiana from 1970 to 1971. Livers of 48 of 50 specimens contained detectable levels of DDT and/or DDE. DDT residues ranged from 0.01 to 10.90 ppm; DDE levels...
Gravity and magnetic fields of polygonal prisms and application to magnetic terrain corrections
Donald Plouff
1976, Geophysics (41) 727-741
Computer programs based on the exact calculations of the gravity and magnetic anomalies of polygonal prisms are faster in operation and more accurate than previous programs based on the numerical integration of polygonal laminas. The prism programs also are of more general application than existing computer programs that are based...
Mapping of mountain soils west of Denver, Colorado, for landuse planning
P. W. Schmidt, Kenneth L. Pierce
1976, Conference Paper, Geomorphology and engineering: Binghamton Geomorphology Symposium 7
No abstract available....
Obsidian hydration dating and correlation of Bull Lake and Pinedale Glaciations near West Yellowstone, Montana
Kenneth L. Pierce, J. Obradovich, Irving Friedman
1976, GSA Bulletin (87) 703-710
The ages of the last two glaciations near West Yellowstone, Montana, can be calculated by obsidian hydration techniques that are calibrated by K-Ar dating of obsidian-bearing lava flows. The average age of glacial abrasion of obsidian in the Pinedale terminal moraines is about 30,000 yr, with most age measurements between...
Residues of organochlorines and heavy metals in ruddy ducks from the Delaware River, 1973
Donald H. White, T. E. Kaiser
1976, Pesticides Monitoring Journal (9) 155-156
In December 1973, eight ruddy ducks killed in an oil spill on the Delaware River were collected to be analyzed for residues of environmental pollutants. Whole carcasses were analyzed for organochlorine pesticides and livers were examined for lead, cadmium, and mercury. Residues of polychlorinated biphenyls and DDT and/or its metabolites...
Chemical residue content and hatchability of screech owl eggs
Erwin E. Klaas, D. M. Swineford
1976, The Wilson Bulletin (88) 421-426
Eggs of wild Screech Owls were collected from nests in northwestern Ohio in 1973. One egg was taken from each of 19 nests near the start of incubation. Mean shell thickness in these 19 eggs and mean thickness of 16 unhatched eggs did not differ from 49 archival eggs collected...
Hydrogeology of a drift-filled bedrock valley near Lino Lakes, Anoka County, Minnesota
T. C. Winter, H.O. Pfannkuch
1976, Journal of Research of the U.S. Geological Survey (4) 267-276
The bedrock surface of east-central Minnesota is dissected by an intricate network of valleys. Outside the bedrock valley at site B, 3 mi (4. 8 km) from site A, 100 ft (30 m) of drift overlies the bedrock surface. Observation wells were installed...
Mathematical models for nonparametric inferences from line transect data
K.P. Burnham, David R. Anderson
1976, Biometrics (32) 325-336
A general mathematical theory of line transects is develoepd which supplies a framework for nonparametric density estimation based on either right angle or sighting distances. The probability of observing a point given its right angle distance (y) from the line is generalized to an arbitrary function g(y). Given only that...
Evaluation of LANDSAT-1 image applications to geologic mapping, structural analysis and mineral resource inventory of South America with special emphasis on the Andes Mountain region: Type III final report for period January 1973 to July 1974
William D. Carter
1976, Report
The author has identified the following significant results. The discovery of copper mineralization along a lineament mapped in Area 7 (La Paz) has lent credence to the use of LANDSAT 1 data as a basic step in mineral exploration. In Area 9 (Copiapo Region), a number of lineaments were found...
Analysis of slump slip lines and deformation fabric in slumped Pleistocene lake beds
Byron D. Stone
1976, Journal of Sedimentary Research (46) 313-325
Slumped glacial delta sands and silts exhibit flexural slip folds and low-angle thrust faults where the beds remained coherent during slump deformation. Alternating cross-cutting relationships between f (sub l ) and f (sub r ) fold axial planes indicate that these fold groups are conjugate sets, related to the same...
Sclerochronology: a tool for interpreting past environments
J. Harold Hudson, Eugene A. Shinn, Robert B. Halley, Barbara H. Lidz
1976, Geology (4) 361-364
X-radiographs of stony coral slabs reveal two types of annual density bands. Detailed studies of these bands in relation to known variations in air temperatures indicate that sclerochronology is a valid tool for documenting time sequences and changing environmental conditions on a coral reef....
Western Energy and Land Use Team preliminary FY 76 project list and status report: May 20, 1976
1976, Report
No abstract available....
Reproductive activity in nine- and ten-month-old wolves
D.C. Medjo, L.D. Mech
1976, Journal of Mammalogy (57) 406-408
No abstract available....
Influence of stimuli from populations of Peromyscus leucopus on maturation of young
J.G. Rogers Jr., G.K. Beauchamp
1976, Journal of Mammalogy (57) 320-330
The effects of stimuli associated with conspecific laboratory populations on parameters of sexual maturation in Peromyscus leucopus were examined. Beginning at birth, experimental litters were exposed to the constant infusion of urine, feces, and other material from the populations through a metabolism funnel into their cages. As evidenced by age at...
Natural hazards in mountain Colorado
Jack D. Ives, Authur I. Mears, Paul E. Carrara, Michael J. Bovis
1976, Annals of the American Association of Geographers (66) 129-144
Interdisciplinary field studies and remote sensing techniques were used to delineate mountain areas in Colorado subject to such natural hazards as snow avalanches, mudflows, rockfalls, and landslides. The old mining townsite of Ophir in the northwestern San Juan Mountains was used as a case study. Its serious snow avalanche hazard...
Marine diatom and silicoflagellate biostratigraphy of the type Delmontian Stage and the type Bolivina obliqua Zone, California
John A. Barron
1976, Journal of Research of the U.S. Geological Survey (4) 339-351
Investigation of the marine diatom and silicoflagellate biostratigraphy of the type Delmontian Stage and and type Bolivina obliqua Zone in California shows that the type Delmontian Stage is equivalent to part of the supposedly older Mohnian Stage and is early late Miocene. The type Bolivina obliqua Zone, which conformably overlies...
