Districts for 104th Congress
U.S. Bureau of the Census
1990, Report
This is a polygon coverage of 104th Congressional District boundaries obtained from the U.S. Bureau of the Census. The 103rd Congress was the first Congress that reflected the reapportionment and delineation of congressional districts based on the 1990 census. The next (104th) Congress reflects redelineation of districts that...
Induction of sporulation and the influence of time, temperature, and inoculum size on growth in two species of aquatic fungi (Saprolegniales)
T.A. Bailey, K. Bradford, C.E. Bland
1990, Journal of the Elisha Mitchell Scientific Society (106) 57-63
Because the infective stage of most mycoses of aquatic organisms is the zoospore, we attempted to establish optimum conditions under which zoospores could be produced for use in antifungal testing. Optimum sporulation time, incubation time, inoculum size, and growth temperature were determined for each oftwo saprolegniaceous fungi, Achlya flagellata Coker...
Use of fish corrals in the seine fishery of the Virgin Islands
Cecil A. Jennings
1990, Marine Fisheries Review (52) 18-19
Although selected aspects of the commercial fishery in the Virgin Islands have been documented since the early 1930's, fish corrals and their use have not been described. This account, based on personal observations made during 1985-86, summarizes commercial fishing methods in the Virgin Islands (U.S. and British),...
Occurrence and geochemistry of natural gases, Piceance Basin, northwest Colorado
Ronald C. Johnson, Dudley D. Rice
1990, American Association of Petroleum Geologists Bulletin (74) 805-829
The Piceance basin is a hydrocarbon-rich province that has natural gas production from reservoirs ranging in age from Late Jurassic to Eocene and large undeveloped resources of natural gas in coal beds and tight sandstone reservoirs of Cretaceous age. Gases from all producing intervals are of predominantly thermal origin and...
Organochlorines, mercury, and selenium in wintering shorebirds from Washington and California
T. W. Custer, J.P. Myers
1990, California Fish and Game (76) 118-125
Dunlins Caldris alpina , and black-bellied plovers, Pluvialis squatarola , were collected in Washington and California during the winter of 1984-85; long-billed dowitchers, Limnodromus scolopaceus , were collected in California. Pooled breast muscles were analyzed for organochlorines and pooled livers for mercury and selenium. DDE was detected...
Enzyme leaching of surficial geochemical samples for detecting hydromorphic trace-element anomalies associated with precious-metal mineralized bedrock buried beneath glacial overburden in northern Minnesota
Robert J. Clark, A. L. Meier, G. Riddle
Hausen Donald M.Halbe Douglas N.Petersen Erich U.Tafuri William J., editor(s)
1990, Conference Paper
One objective of the International Falls and Roseau, Minnesota, CUSMAP projects was to develop a means of conducting regional-scale geochemical surveys in areas where bedrock is buried beneath complex glacially derived overburden. Partial analysis of B-horizon soils offered hope for detecting subtle hydromorphic trace-element dispersion patterns. An enzyme-based partial leach...
Quarterly Wildlife Mortality Report
K. A. Converse, R. Windingstad
1990, Supplement to the Journal of Wildlife Diseases (26)
Changes in Wisconsin's Lake Michigan salmonid sport fishery, 1969-1985
Michael J. Hansen, Paul T. Schultz, Becky A. Lasee
1990, North American Journal of Fisheries Management (10) 442-457
The modern sport fishery for salmonids in Wisconsin waters of Lake Michigan was begun during 1963-1969 with the stocking of rainbow trout (Oncorhynchus mykiss), lake trout (Salvelinus namaycush), brook trout (S. fontinalis), brown trout (Salmo trutta), coho salmon (O. kisutch), and chinook salmon (O. tshawytscha). The fishery grew rapidly...
Physical factors and their influence on the mussel fauna of a main channel border habitat of the upper Mississippi River
L. E. Holland Bartels
1990, Journal of the North American Benthological Society (9) 327-335
The habitats of mussel species in a portion of the main stem of Navigation Pool 10 of the upper Mississippi River were examined. Population composition, abundance, and sediment and current preferences were measured at 186 sites in the East Channel of the...
Anomalous chloride flux discharges from Yellowstone National Park
I. Friedman, D. R. Norton
1990, Journal of Volcanology and Geothermal Research (42) 225-234
The chloride concentration of some thermal springs in and adjacent to Yellowstone National Park is constant through time although their discharge varies seasonally. As a result the chloride flux from these springs increases during periods of increased discharge. We believe that this is caused by changes in the height of...
Incubation rhythm in the Fulmar Fulmarus glacialis: Annual variation and sex roles
Scott A. Hatch
1990, Ibis (132) 515-524
I monitored the incubation schedules of Fulmars Fulmarus glacialis in an Alaskan colony by observing nests where the male and female were of different colour phases. Complete shifts of up to 16 days were recorded; the average shift in mid-incubation was 4–6 days. Mean shift length was inversely correlated with...
Redefinition of Teneridrilus Holmquist (Oligochaeta: Tubificidae), with description of two new species from North America
Christer Erseus, Jarl K. Hiltunen, Ralph O. Brinkhurst, Don W. Schloesser
1990, Proceedings of the Biological Society of Washington (103) 839-846
The tubificid genus Teneridrilus Holmquist, 1985 (subfamily Tubificinae) is redefined. The genus was originally monotypic for the type species, formerly classified as Ilyodrilus mastix Brinkhurst, 1978. The genus now includes Teneridrilus columbiensis, a new combination for Isochaetides columbiensis, and two new species. The first of these, Teneridrilus...
Recovery of an offshore lake trout (Salvelinus namaycush) population in eastern Lake Superior
Gary L. Curtis
1990, Journal of Great Lakes Research (16) 279-287
The lake trout (Salvelinus namaycush) population at Stannard Rock, Michigan, an isolated offshore reef in eastern Lake Superior, was monitored each spring from 1959–79 using a permit assessment gill net fishery. This population, like nearly all of those in inshore waters, declined to low levels during the years of intense...
Effects of neck bands on the behavior of wintering greater white-fronted geese
Craig R. Ely
1990, Journal of Field Ornithology (61) 249-253
Activity budgets of adult Greater White-fronted Geese (Anser albifrons frontalis) with and without neck bands during the non-breeding season revealed that geese with neck bands spent more time preening than geese without neck bands while at foraging sites, but not while at roosting sites. Neck-banded and control geese spent equal...
Colony attendance and population monitoring of Least and Crested auklets on St. Lawrence Island, Alaska
John F. Piatt, Bay D. Roberts, Scott A. Hatch
1990, The Condor (92) 97-106
Diurnal and seasonal patterns of attendance of Least Auklets (Aethia pusilla) and Crested Auklets (A. cristatella) were studied in 1987 at breeding colonies on St. Lawrence Island, Alaska. Numbers of auklets attending eight 200-m2 plots on talus slopes were counted throughout the day by observers on 11 occasions through the...
Extra-pair copulations in Black Brant
Daniel Welsh, James S. Sedinger
1990, The Condor (92) 242-244
Monogamy is the primary mating system among waterfowl, but extra-pair copulations (EPCs) have been documented in at least 39 species (McKinney et al. 1983). Extra-pair copulations occur in most Holarctic species of dabbling ducks (Anas spp.), but have been recorded in only three species of geese: Lesser Snow Geese, Chen...
Evaluation of line transect sampling based on remotely sensed data from underwater video
R.A. Bergstedt, David R. Anderson
1990, Transactions of the American Fisheries Society (119) 86-91
We used underwater video in conjunction with the line transect method and a Fourier series estimator to make 13 independent estimates of the density of known populations of bricks lying on the bottom in shallows of Lake Huron. The pooled estimate of density (95.5 bricks per hectare) was close to...
Effects of visiting black brant nests on egg and nest survival
James S. Sedinger
1990, Journal of Wildlife Management (54) 437-443
I used 2 methods to evaluate the effect of visiting black brant (Branta bernicla nigricans) nests on survival of whole nests and eggs in a single colony on the Yukon-Kuskokwim Delta, Alaska. The first technique regressed survival of nests or eggs during a time interval against interval length. Departure of...
Mass-marking of otoliths of lake trout sac fry by temperature manipulation
R.A. Bergstedt, R.L. Eshenroder, C. Bowen, J.G. Seelye, J.C. Locke
N. C. Parker, A.E. Giorgi, R.C. Heidenger, D. B. Jester Jr., E.D. Prince, G.A. Winans, editor(s)
1990, Book chapter, Fish-marking techniques
The otoliths of 676,000 sac fry of lake trout Salvelinus namaycush in 1986, and of 1,100,000 in 1987, were marked by daily manipulation of water temperature. The fish were stocked into Lake Huron in the spring. Otolith marks consisted of groups of daily growth rings accentuated into recognizable patterns...
Assessing the visual quality of small islands and shoals in the Thousand Islands Region
M. G. Knutson, D.J. Leopold, R.C. Smardon
J. Kusler, R. Smardon, editor(s)
1990, Book chapter, Wetlands of the Great Lakes: protection and restoration policies; status of the science
Abstract not submitted to date...
On graphically representing the confidence region for an unknown rotation in three dimensions
M.S. Hanna, T. Chang
1990, Computers & Geosciences (16) 163-194
In assessing the errors involved in reconstructing tectonic plate rotations, it is desirable to have confidence regions for the unknown rotation. This paper presents a method for graphing such confidence regions, which exhibits the dependence of the range of possible angles of rotation on the axis considered. Namely, the minimum...
Mineralized and unmineralized calderas in Spain; Part I, evolution of the Los Frailes Caldera
C. G. Cunningham, A. Arribas Jr., J. J. Rytuba, A. Arribas
1990, Mineralium Deposita (25)
The Cabo de Gata volcanic field of southeastern Spain contains several recently-recognized calderas. Some of the calderas are mineralized with epithermal gold, alunite, and base metal deposits, and others are barren, and yet they formed under generally similar conditions. Comparison of the magmatic, geochemical, and physical evolution of the Los...
What do we mean by accuracy in geomagnetic measurements?
A.W. Green Jr.
1990, Physics of the Earth and Planetary Interiors (59) 13-16
High accuracy is what distinguishes measurements made at the world's magnetic observatories from other types of geomagnetic measurements. High accuracy in determining the absolute values of the components of the Earth's magnetic field is essential to studying geomagnetic secular variation and processes at the core mantle boundary, as well as...
Rhyolitic calderas of the Yukon-Tanana Terrane, east central Alaska: volcanic remnants of a mid-Cretaceous magmatic arc
C. R. Bacon, H.L. Foster, James G. Smith
1990, Journal of Geophysical Research (95) 21451-21461
Four large but poorly exposed rhyolitic calderas are present in the Yukon-Tanana terrane (YTT) in east central Alaska. At least two are mid-Cretaceous in age (~93 Ma). Similar volcanic rocks, the South Fork Volcanics, occur northeast of the Tintina fault in Yukon Territory. Evidence for the calderas consists of thick...
Thermodynamic properties for bunsenite, NiO, magnetite, Fe3O4, and hematite, Fe2O3, with comments on selected oxygen buffer reactions
B. S. Hemingway
1990, American Mineralogist (75) 781-790
Smoothed values of the heat capacities and derived thermodynamic functions are given for bunsenite, magnetite, and hematite for the temperature interval 298.15 to 1800 K. The Gibbs free energy for the reaction Ni + 0.5O2 = NiO is given by the equation ??rG0T = -238.39 + 0.1146T - 3.72 ??...
