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Page 5007, results 125151 - 125175

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Population dynamics and interagency management of the bloater (Coregonus hoyi) in Lake Michigan, 1967-1982
Edward H. Brown Jr., Ronald W. Rybicki, Ronald J. Poff
1985, Technical Report 44
This paper examines the population dynamics of the bloater (Coregonus hoyi) in Lake Michigan during a progressive decline in abundance from about the mid1960s through the mid1970s, and during a subsequent recovery that is still underway. The study focused on developing a data base and methodology for projecting fishable surpluses,...
Review of fish species introduced into the Great Lakes, 1819-1974
Lee Emery
1985, Technical Report 45
This review is based on an extensive literature search, combined with updated information obtained from biologists, and unpublished reports from private, state, and federal organizations throughout the Great Lakes basin. The chronological review lists 34 species of fishes in 13 families that were introduced into the basin from 1819 to...
Ecological effects of rubble-mound breakwater construction and channel dredging at West Harbor, Ohio (western Lake Erie)
Bruce A. Manny, Donald W. Schloesser, Charles L. Brown, John R. P. French III
1985, Technical Report EL-85-10
The investigation reported herein indicated that breakwater construction and associated channel dredging activities by the US Army Corps of Engineers in western Lake Erie at the entrance to West Harbor (Ohio) had no detectable adverse impacts on the distributions or abundances of macrozoobenthos and fishes. Rather, increases were noted in...
Maneuverability of the Humboldt penguin (Spheniscus humboldti) during swimming
Clifford A. Hui
1985, Canadian Journal of Zoology (63) 2165-2167
Analyses of high-speed film of captive Humboldt penguins (Spheniscus humboldti) show that there is no correlation between the radii of submerged turns and swimming speed. The sharpest turns had a mean turn radius (n = 5) of 0.14 m (0.24 body lengths), were powered by beating wings, and used multiple steering structures (beak,...
Tolerance of West Indian manatees to capture and handling
T. J. O'Shea, G. B. Rathbun, E.D. Asper, S.W. Searles
1985, Biological Conservation (33) 335-349
Ninety-two West Indian manatees (Trichechus manatus) have been captured in the southeastern United States from October 1975 through November 1983 with no evidence of an unusual susceptibility to capture myopathy. Of these, 53 were radio-tracked or observed in the field following capture with no evidence of delayed capture stress. Blood samples obtained...
Altered energy metabolism in an irradiated population of lizards at the Nevada Test Site
K.A. Nagy, P.A. Medica
1985, Radiation Research (103) 98-104
Field metabolic rates (via doubly labeled water), body compartmentalization of energy stores, and energy assimilation efficiencies were measured to assess all avenues of energy utilization in Uta stansburiana living in a low-level γ-irradiated plot in Rock Valley, Nevada. Comparison of energy budgets for radiation-sterilized females with those of nonirradiated control...
Fish immunology and fish health
W. B. van Muiswinkel, D. P. Anderson, C.H.J. Lamers, E. Egberts, J. J. A. van Loon, J.P. Ijssel
M.J. Manning, M.F. Tatner, editor(s)
1985, Book chapter, Fish Immunology
No abstract available at this time...
Active tectonic and magmatic processes beneath Long Valley Caldera, eastern California: An overview
D.P. Hill, R. A. Bailey, A.S. Ryall
1985, Journal of Geophysical Research Solid Earth (90) 11111-11120
Geological, chronological, and structural studies of the Long Valley-Mono/Inyo Craters area document a long history of related volcanic eruptions and earthquakes controlled by regional extensional tectonics of the Basin and Range province. This activity has persisted for hundreds of thousands of years and is likely to continue. The Long Valley...
EVALUATION OF THE EFFECTS OF WEATHERING ON A 50-YEAR OLD RETORTED OIL-SHALE WASTE PILE, RULISON EXPERIMENTAL RETORT, COLORADO.
Michele L. Tuttle, Walter E. Dean, Daniel J. Ackerman
Gary James H., editor(s)
1985, Conference Paper, Oil Shale Symposium Proceedings
An oil-shale mine and experimental retort were operated near Rulison, Colorado by the U. S. Bureau of Mines from 1926 to 1929. Samples from seven drill cores from a retorted oil-shale waste pile were analyzed to determine 1) the chemical and mineral composition of the retorted oil shale and 2)...
Mobility of organic solvents in water-saturated soil materials
William R. Roy, R. A. Griffin
1985, Environmental Geology and Water Sciences (7) 241-247
This investigation presents an analysis of the mobility of 37 organic solvents in saturated soil-water systems, focusing on adsorption phenomena at the solid-liquid interface This analysis was made, in part, by applying predictive expressions that estimate the potential magnitude of adsorption by soil materials Of the 37 solvents considered, 19...
U-Pb isochron age and Pb isotope systematics of the Golden Fleece vein; implications for the relationship of mineralization to the Lake City caldera, western San Juan Mountains, Colorado
K. Hon, K.R. Ludwig, K. R. Simmons, J. F. Slack, R. I. Grauch
1985, Economic Geology (80) 410-417
A U-Pb isochron age of 27.5 + or - 0.5 m.y. has been determined for the Golden Fleece vein, southwestern Colorado, which contains an assemblage of pitchblende and gold-silver tellurides unique within the Lake City area. Initial Pb isotope ratios of ore samples from the vein ( 206 Pb/ 204 Pb = 19.08-19.58; 207 Pb/ 204 Pb =...
Petrogenesis of the magmatic complex at Mount Ascutney, Vermont, USA - I. Assimilation of crust by mafic magmas based on Sr and O isotopic and major element relationships
K.A. Foland, C.M.B. Henderson, J. Gleason
1985, Contributions to Mineralogy and Petrology (90) 331-345
The Ascutney Mountain igneous complex in eastern Vermont, USA, is composed of three principal units with compositions ranging from gabbro to granite. Sr and O isotopic and major element relationships for mafic rocks, granites, and nearby gneissic and schistose country rock have been investigated in order to describe the petrogenesis...
Phase relations and adiabats in boiling seafloor geothermal systems
J. L. Bischoff, Kenneth S. Pitzer
1985, Earth and Planetary Science Letters (75) 327-338
Observations of large salinity variations and vent temperatures in the range of 380–400°C suggest that boiling or two-phase separation may be occurring in some seafloor geothermal systems. Consideration of flow rates and the relatively small differences in density between vapors and...
Regional magnetotelluric surveys in hydrocarbon exploration, Parana Basin, Brazil
William D. Stanley, Antonio Roberto Saad Roberto, Walter Ohofugi
1985, American Association of Petroleum Geologists Bulletin (69) 346-360
The magnetotelluric geophysical method has been used effectively as a hydrocarbon exploration tool in the intracratonic Parana basin of South America. The Parana basin has an area of about 1,200,000 km2 (463,000 mi2), extending over portions of Brazil, Paraguay, Uruguay, Argentina, and Bolivia. The Paleozoic marine sedimentary rocks in the Parana...