Mass-marking of otoliths of lake trout sac fry by temperature manipulation
Roger A. Bergstedt, Randy L. Eshenroder, Charles Bowen, James G. Seelye, Jeffrey C. Locke
1990, American Fisheries Society Symposium (7) 216-223
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 by...
Operation of U.S. Geological Survey unmanned digital magnetic observatories
L.R. Wilson
1990, Physics of the Earth and Planetary Interiors (59) 45-54
The precision and continuity of data recorded by unmanned digital magnetic observatories depend on the type of data acquisition equipment used and operating procedures employed. Three generations of observatory systems used by the U.S. Geological Survey are described. A table listing the frequency of component failures in the current observatory...
A bioaccumulation bioassay for freshwater sediments
Michael J. Mac, George E. Noguchi, Robert J. Hesselberg, Carol C. Edsall, John A. Shoesmith, James D. Bowker
1990, Environmental Toxicology and Chemistry (9) 1405-1414
A laboratory bioassay is described for determining the bioavailability of contaminants from freshwater sediments. The bioassay consists of 10-d exposures to whole sediments under flow-through conditions. After testing five species, the fathead minnow (Pimephales promelas) and the earthworm (Lubricus terrestris) were recommended for use in the test....
Vapor-liquid phase equilibria of potassium chloride-water mixtures: Equation-of-state representation for KCl-H2O and NaCl-H2O
J.K. Hovey, Kenneth S. Pitzer, J.C. Tanger IV, J. L. Bischoff, R.J. Rosenbauer
1990, Journal of Physical Chemistry (94) 1175-1179
Measurements of isothermal vapor-liquid compositions for KCl-H2O as a function of pressure are reported. An equation of state, which was originally proposed by Pitzer and was improved and used by Tanger and Pitzer to fit the vapor-liquid coexistence surface for NaCl-H2O, has been used for representation of the KCl-H2O system...
Computational open-channel hydraulics for movable-bed problems
Chintu Lai
Chang Howard H.Hill Joseph C., editor(s)
1990, Conference Paper, Hydraulic Engineering - Proceedings of the 1990 National Conference
As a major branch of computational hydraulics, notable advances have been made in numerical modeling of unsteady open-channel flow since the beginning of the computer age. According to the broader definition and scope of 'computational hydraulics,' the basic concepts and technology of modeling unsteady open-channel flow have been systematically studied...
D/H on Mars: Effects of floods, volcanism, impacts, and polar processes
M. H. Carr
1990, Icarus (87) 210-227
Water in the Martian atmosphere is 5.1 times more enriched in deuterium than terrestial water. The enrichment has been previously attributed to either a massive loss of water early in the planet's history or the presence of only a very small...
Traveltime inversion using transmitted waves of offset VSP data
Myung W. Lee
1990, Geophysics (55) 1089-1097
Estimation of layer parameters such as interval velocity, reflector depth, and dip can be formulated as a generalized linear inverse problem using observed arrival times. Based on a 2-D earth model, a computationally efficient and accurate formula is derived for traveltime inversion. This inversion method is applied to offset vertical...
Improved method for sectioning pectoral spines of catfish for age determination
Marc A. Blouin, Glenda R. Hall
1990, Journal of Freshwater Ecology (5) 489-490
A modified low-speed saw provided fast and precise sectioning of catfish pectoral spines for use in aging studies. In one hour, 10–15 spines can be sectioned, the sections mounted, and the annuli counted. Two methods commonly used to section ictalurid pectoral spines are (1) acid decalcification, followed by the...
Infectious pancreatic virus can be recovered from wild bird feces
P. E. McAllister, W. J. Owens
1990, Research Information Bulletin 108
No abstract available at this time...
Comparative susceptibility of brook trout, lake trout and Atlantic salmon to infectious pancreatic necrosis
P. E. McAllister, W. J. Owens
1990, Research Information Bulletin 83
No abstract available at this time...
Effects of tillage practices and carbofuran exposure on small mammals
Peter H. Albers, Greg L. Linder, James D. Nichols
1990, Journal of Wildlife Management (54) 135-142
We compared population estimates, body mass, movement, and blood chemistry of small mammals between conventionally tilled and no-till cornfields in Maryland and Pennsylvania to evaluate the effects of tillage practices and carbofuran exposure on small mammals. Estimates suggest that populations of white-footed mice (Peromyscus leucopus) were not significantly related (P...
Toxic substances
J. B. Hunn, R. A. Schnick
Fred P. Meyer, Lee A. Barclay, editor(s)
1990, Resource Publication 177-4
No abstract available....
Introduction
Fred P. Meyer
Fred P. Meyer, Lee A. Barclay, editor(s)
1990, Resource Publication 177-1
No abstract available....
Test your skill
Fred P. Meyer
Fred P. Meyer, Lee A. Barclay, editor(s)
1990, Resource Publication 177-13
No abstract available....
Geology of the Blue Mountains region of Oregon, Idaho, and Washington: Cenozoic geology of the Blue Mountains region
G.W. Walker, editor(s)
1990, Professional Paper 1437
No abstract available....
Some Edwardsiella ictaluri strains are Romet resistant
C. E. Starliper, R.K. Cooper, E.B. Shotts
1990, Research Information Bulletin 107
No abstract available at this time...
Viral hemorrhagic septicemia of fishes
P. E. McAllister
1990, Fish Disease Leaflet 83
No abstract available at this time...
Health and mortality of Atlantic salmon held in cages in the Merrimack River
D. V. Rottiers
1990, Research Information Bulletin 73
No abstract available at this time...
Protozoan parasites of freshwater fishes
F. P. Meyer, G. L. Bullock
1990, Fish Health Bulletin 8
No abstract available at this time...
When should we start feeding larval striped bass?
S. G. Hughes
1990, Research Information Bulletin 15
No abstract available at this time...
Fish vary in ability to impart moisture to digesta
S. G. Hughes, R. Barrows
1990, Research Information Bulletin 14
No abstract available at this time...
Distillers heavy syrup has potential value in lake trout diets
S. G. Hughes
1990, Research Information Bulletin 24
No abstract available at this time...
Use of feather meal in lake trout diets
S. G. Hughes
1990, Research Information Bulletin 26
No abstract available at this time...
Identification of fish virus by immunoblot assay of virus plaques
P. E. McAllister, W. J. Owens
1990, Research Information Bulletin 82
No abstract available at this time...
Ground-water levels, flow, and specific conductance in unconsolidated aquifers near Lake Erie, Cleveland to Conneaut, Ohio, September 1984
A. W. Coen III
1990, Water-Resources Investigations Report 89-4202
This report described ground-water levels, flow, and specific conductance in aquifer along the southern shore of Lake Erie from Cleveland to Conneaut, Ohio. The data were collected in September 1984 as part of the U.S Geological Survey's Northeast Glacial Buried Valley Regional Aquifer-System Analysis. The study area is about 60...
