Seasonal variation of the upper digestive tract yeast flora of feral pigeons
R. M. Kocan, H.F. Hasenclever
1974, Journal of Wildlife Diseases (10) 263-266
Feral pigeons were sampled over a 16-month period to determine whether their normal yeast flora varied according to season. Candida albicans and Saccharomyces telluris occurred during the entire sampling period, with C. albicans reaching its highest levels between August and January and S. telluris peaking from March through May. Candida krusei was present for 10 months but exhibited no predictable...
Disinfection of contaminated water by ultraviolet irradiation, with emphasis on whirling disease (Myxosoma cerebralis) and its effect on fish
G. L. Hoffman
1974, Transactions of the American Fisheries Society (103) 541-550
Rainbow trout fry developed whirling disease upon exposure to water contaminated with Myxosoma cerebralis. When similarly contaminated water was irradiated with 2537 Angstrom units of ultraviolet light at dosages of 35,000, 43,000, and 112,000 microwatt sec/cm2, infection of fry was prevented. The minimum effective dosage was not determined in the...
Effects of TFM and Bayer 73 on in vivo oxygen consumption of the aquatic midge Chironomus tentans
J.A. Kawatski, V. K. Dawson, M.L. Reuvers
1974, Transactions of the American Fisheries Society (103) 551-556
Exposure of fourth instar larvae of Chironomus tentans to 2.0‐8.0 mg/liter of TFM (3‐trifluormethyl‐4‐nitrophenol) for 6 hr at 22 ± 0.5 C in soft water resulted in a significantly increased rate of larval oxygen consumption compared to that of control larvae, as measured with the Warburg respirometer. Maximum stimulation...
The jumping ability and behavior of green sunfish (Lepomis cyanellus) at the outflow of a 1.6-ha pond
James E. Ellis
1974, Transactions of the American Fisheries Society (103) 620-623
Effects of a plunging water flow on the behavior of green sunfish (Lepomis cyanellus) 7.1 to 9.7 cm in total length were studied at the outflow of a 1.6‐ha pond. Jumping ability and behavior were measured at 12‐hr intervals using a fishˈs position in a 0.9 m2‐vertical grid or in...
Variation of P-wave velocity before the Bear Valley, California, earthquake of 24 February 1972
R. Robinson, R. L. Wesson, W.L. Ellsworth
1974, Science (184) 1281-1283
Residuals for P-wave traveltimes at a seismograph station near Bear Valley, California, for small, precisely located local earthquakes at distances of 20 to 70 kilometers show a sharp increase of nearly 0.3 second about 2 months before a magnitude 5.0 earthquake that occurred within a few kilometers of the station....
Organochlorine residues in brown pelican eggs: Relation to reproductive success
L. J. Blus, B.S. Neely Jr., A. A. Belisle, R. M. Prouty
1974, Environmental Pollution (7) 81-91
This study was conducted to determine the influence of residues of organochlorine pollutants on reproductive success in the brown pelican. A sample egg was taken from each of 93 marked nests in the nesting colony in South Carolina. Periodic visits were made to...
Interaction of dieldrin and DDE residues in Japanese quail (Coturnix coturnix japonica)
J. Larry Ludke
1974, Bulletin of Environmental Contamination and Toxicology (11) 297-302
No abstract available. ...
Plasma enzyme activities in coturnix quail fed graded doses of DDE, polychlorinated biphenyl, malathion, and mercuric chloride
M. P. Dieter
1974, Toxicology and Applied Pharmacology (27) 86-98
Male Coturnix quail (Coturnix coturnix japonica) were fed diets for 12 weeks containing graded levels of DDE, polychlorinated biphenyl (Aroclor 1254), malathion, and mercuric chloride. Birds were bled prior to exposure and at 2, 4 and 12 weeks, and the plasma used to measure the activities of creatine kinase, aspartate...
Effects of low dietary levels of methyl mercury on mallard reproduction
G. Heinz
1974, Bulletin of Environmental Contamination and Toxicology (11) 386-392
Mallard ducks were fed a control diet or a diet containing 0.5 ppm or 3 ppm mercury (as methylmercury dicyandiamide). Health of adults and reproductive success were studied. The dietary level of 3 ppm mercury had harmful effects on reproduction, although it did not appear to affect the health...
Estimating the “thickness” of the Boulder Batholith, Montana, from heat-flow and heat-productivity data
Robert I. Tilling
1974, Geology (2) 457-460
Estimates of minimum thickness of the Boulder batholith, computed using the linear relation between heat flow and heat productivity and assuming constant heat productivity with depth, are highly nonspecific. They can vary between about 3 and 20 km, depending on values of surface-rock heat productivity and values of assumed contribution...
Status of projects in Minnesota, 1974-75 fiscal years
U.S. Geological Survey
1974, Report
No abstract available....
The calculation of aquifer chemistry in hot-water geothermal systems
Alfred H. Truesdell, Wendy Singers
1974, Journal of Research of the U.S. Geological Survey (2) 271-278
The temperature and chemical conditions (pH, gas pressure, and ion activities) in a geothermal aquifer supplying a producing bore can be calculated from the enthalpy of the total fluid (liquid + vapor) produced and chemical analyses of water and steam separated and collected at known pressures. Alternatively, if a single...
The natural quality of ground water in Minnesota
T. C. Winter
1974, Bulletin 26
No abstract available....
Nature of the angular unconformity between the Paleozoic metasedimentary rocks and the mesozoic metavolcanic rocks in the eastern Sierra Nevada, California
C.A. Brook, Warren J. Nokleberg, Ronald W. Kistler
1974, GSA Bulletin (85) 571-576
Two major wall-rock sequences, the Paleozoic metasedimentary rocks and the Mesozoic metavolcanic rocks, in the eastern Sierra Nevada, California, are separated by an angular unconformity rather than by a fault as has been proposed by other investigators. The unconformity is parallel to formation contacts in the younger metavolcanic rocks and...
Meteoric water in magmas
I. Friedman, P. W. Lipman, J. D. Obradovich, J.D. Gleason, R.L. Christiansen
1974, Science (184) 1069-1072
Oxygen isotope analyses of sanidine phenocrysts from rhyolitic sequences in Nevada, Colorado, and the Yellowstone Plateau volcanic field show that δ18O decreased in these magmas as a function of time. This decrease in δ18O may have been caused by isotopic exchange between the magma and groundwater low in 18O. For the...
Preliminary report on geology along Atlantic continental margin of northeastern United States
J. P. Minard, W. J. Perry, Elaine G. A. Weed, E. C. Rhodehamel, E. I. Robbins, R. B. Mixon
1974, American Association of Petroleum Geologists Bulletin (58) 1169-1178
The U.S. Geological Survey is conducting a geologic and geophysical study of the northeastern United States outer continental shelf and the adjacent slope from Georges Bank to Cape Hatteras. The study also includes the adjacent coastal plain because it is a more accessible extension of the shelf. The total study...
An optimum reduction of gauges to meet data program constraints
Thomas Maddock III
1974, Hydrological Sciences Bulletin (19) 337-345
Budget or manpower constraints may force a reduction in data collection activities. However, information may be transferred from continued gauge sites to discontinued gauge sites provided there is ‘sufficient’ correlation between flow sequences. Information defined as the reciprocal of variance (of the parameter estimator for which the gauge has been...
Why not an extraterrestrial geography?
Richard J. Pike
1974, Professional Geographer (26) 258-261
No abstract available....
Changes in oxygen and primary production of the Patuxent estuary, Maryland, 1963 through 1969
R. L. Cory
1974, Chesapeake Science (15) 78-83
From 1963 through 1969, the U.S. Geological Survey operated a water-quality monitor system in the upper-middle Patuxent estuary, near Benedict, Maryland. Over the period of record, a pronounced change occurred in the diel (24 hr.) oxygen measurement, particularly during the months of July, August, and September. Annual variations of dissolved...
Pesticides in selected western streams, 1968-71
Jean A. Schulze, Douglas B. Manigold, Freeman L. Andrews
1974, Pesticides Monitoring Journal (7) 73-84
No abstract available....
Channel changes
William W. Emmett
1974, Geology (2) 271-272
Environmental impacts may alter the quantities of water and sediment carried in a stream and thus may increase or diminish naturally occurring rates of channel changes and the pre-impact frequency of flows. Repetitive cross-channel surveys to determine changes in channel size or location are a measure of the response of...
Selected chlorinated hydrocarbons in bottom material from streams tributary to San Francisco Bay
LeRoy M. Law, Donald F. Goerlitz
1974, Pesticides Monitoring Journal (8) 33-36
As part of a study of the environmental quality of San Francisco Bay, bottom material from 26 streams tributary to the Bay were analyzed for chlordane, DDD, DDE, DDT, and PCB residues. These compounds were present in essentially all streams tested. Chlordane proved to be ubiquitous, with a concentration range...
The literature of the California black rail
Sanford R. Wilbur
1974, Special Scientific Report - Wildlife 179
Few birds have remained so little known as the California black rail (Laterallus jamaicensis coturniculus). Although first collected in 1859 or before and reported in 1874 (Ridgway 1874), its life history, distribution, and status have remained so obscure that even a sight record of the bird is deemed worthy of...
Relationships among three criteria of puberty in Peromyscus leucopus noveboracensis
J.G. Rogers Jr., G.K. Beauchamp
1974, Journal of Mammalogy (55) 461-462
No abstract available. ...
MER: Ultimate recovery and production rate
W. K. Savage, A. R. Thachuk, Hassan Beykpour, J. H. Lohrenz
1974, Conference Paper
No abstract available....
