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Page 4856, results 121376 - 121400

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Reproductive tests of diazinon on bobwhite quail
K. L. Stromborg
D.W. Lamb, E.E. Kenaga, editor(s)
1981, Book chapter, Avian and Mammalian Wildlife Toxicology: Second Conference
Diazinon was fed at sublethal levels to reproductively active bobwhite (Colinus virginianus). Thirty pairs were given constant concentrations (0, 35. 50, 72, 104, or 150 ppm) for 3 weeks (Constant group). Another 30 pairs (Pair-fed group) were matched to these by body weights and were fed the amounts of untreated...
Formalin preservation of avian blood for organochlorine analysis
C. J. Stafford, W. H. Stickel
D.W. Lamb, E.E. Kenaga, editor(s)
1981, Book chapter, Avian and Mammalian Wildlife Toxicology: Second Conference
Blood biopsy for chemical analysis is a valuable technique for evaluating chemical exposure of birds in the wild without harming the birds. Field conditions, however, often make sample storage difficult. Better methods than freezing are needed to improve the interpretive value of chemical analysis of the sample....
Diagnostic brain residues of dieldrin: Some new insights
G. H. Heinz, R.W. Johnson
D.W. Lamb, E.E. Kenaga, editor(s)
1981, Book chapter, Avian and Mammalian Wildlife Toxicology, Second Conference: a symposium
Forty adult male cowbirds were fed a diet containing 20 ppm dieldrin; 20 of the birds were randomly selected to die from dieldrin poisoning and 20 were sacrificed when dieldrin had made them too sick to eat. An average of 6.8 ppm dieldrin (range of 1.51 to 11.7) in the...
Inorganic and organic mercury chloride toxicity to Coturnix: sensitivity related to age and quantal assessment of physiologic responses
E. F. Hill
1981, Book
The toxicities of mercuric chloride (HgCl(,2)) and methylmercuric chloride (CH(,3)HgCl) were compared for coturnix (Coturnix coturnix japonica) from hatching to adulthood. Comparisons were based on: (1) Median lethal dosages (LD50) derived by administering single peroral and single intramuscular dosages of mercury, (2) median lethal concentrations (LC50) derived by feeding mercury...
Map accuracy
U.S. Geological Survey
1981, Report
An inaccurate map is not a reliable map. "X" may mark the spot where the treasure is buried, but unless the seeker can locate "X" in relation to known landmarks or positions, the map is not very useful....
APSRS state-base graphics
Water Resources Division, U.S. Geological Survey
1981, Report
The National Cartographic Information Center (NCIC) is the information branch of the U.S. Geological Survey's National Mapping Division. In order to organize and distribute information about U.S. aerial photography coverage and to help eliminate aerial mapping duplication by tracking individual aerial projects, NCIC developed the Aerial Photography Summary Record System...
Rock-weathering rates as functions of time
Steven M. Colman
1981, Quaternary Research (15) 250-264
The scarcity of documented numerical relations between rock weathering and time has led to a common assumption that rates of weathering are linear. This assumption has been strengthened by studies that have calculated long-term average rates. However, little theoretical or empirical evidence exists to support linear rates for most chemical-weathering...
The sedimentary framework of the southern basin of Lake George, New York
D. R. Hutchinson, W.M. Ferrebee, H.J. Knebel, R. J. Wold, Y.W. Isachsen
1981, Quaternary Research (15) 44-61
Information from 240 km of high-resolution seismic reflection profiles has been analyzed to show the bathymetric and subsurface configuration of southern Lake George in the southeastern corner of the Adirondack Mountains, New York. Three units have been identified and sampled in 13 piston cores as long as 7 m and...
Geologic evidence for age of deposits at Hueyatlaco archeological site, Vasequillo, Mexico
V. Steen-McIntyre, R. Fryxell, H.E. Malde
1981, Quaternary Research (16) 1-17
Direct tracing of beds during excavation in May 1973, confirmed that the artifact-bearing layers at Hueyatlaco underlie 10 m of fine-grained, water-laid deposits that constitute part of the wide-spread Valsequillo gravels. Dissection of these deposits by the adjacent Río Atoyac has reached a depth of 50 m. The stratigraphic section...
Dated wood from Alaska and the Yukon: Implications for forest refugia in Beringia
D.M. Hopkins, P.A. Smith, J.V. Matthews Jr.
1981, Quaternary Research (15) 217-249
Postulations on the existence of forest refugia in parts of Beringia during the last glacial have been, in large part, based on ambiguous evidence. Existing data on radiocarbon-dated and identified fossil wood and macrofossils from Alaska and northwest Canada are synthesized here and are augmented by results of palynological studies...
Canyon Creek: A late Pleistocene vertebrate locality in interior Alaska
F. R. Weber, T. D. Hamilton, D.M. Hopkins, C.A. Repenning, H. Haas
1981, Quaternary Research (16) 167-180
The Canyon Creek vertebrate-fossil locality is an extensive road cut near Fairbanks that exposes sediments that range in age from early Wisconsin to late Holocene. Tanana River gravel at the base of the section evidently formed during the Delta Glaciation of the north-central Alaska Range. Younger layers and lenses of...