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Page 4861, results 121501 - 121525

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Publication Extents

Not all publications have extents, not all extents are completely accurate
PCBs and organochlorine pesticides in wild mink and river otters from Oregon
Charles J. Henny, L. J. Blus, S.V. Gregory, C. J. Stafford
Joseph A. Chapman, Duane Pursley, editor(s)
1981, Book chapter, Worldwide Furbearer Conference Proceedings: August 3-11, 1980, Frostburg, Maryland, USA
Mink (Mustela vison) and river otters (Lutra canadensis) collected during the 1978-1979 trapping season in Oregon were analyzed for organochlorine pesticide and polychlorinated biphenyl (PCB) residues. PCB residues were most frequently encountered in both species from the Lower Columbia River. PCB residues in 6 of 9 Columbia River mink livers...
Problems in separating species with similar habits and vocalizations
C.S. Robbins, R.W. Stallcup
C. John Ralph, J. Michael Scott, editor(s)
1981, Book chapter, Estimating Numbers of Terrestrial Birds
The possibilities for species misidentification based on vocalization or habitat association are high. However, the magnitude of the errors actually perpetrated is generally within an acceptable range in most types of bird survey work. Examples of problems discussed are: congeners that are similar in appearance or in song (such...
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....
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...
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...
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...