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Page 3136, results 78376 - 78400

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Not all publications have extents, not all extents are completely accurate
Estimates of shorebird populations in North America
R. I. G. Morrison, Robert E. Gill Jr., B. A. Harrington, S. K. Skagen, G. W. Page, C. L. Gratto-Trevor, S. M. Haig
2001, Occasional Paper of the Canadian Wildlife Service 104
Estimates are presented for the population sizes of 53 species of Nearctic shorebirds occurring regularly in North America, plus four species that breed occasionally. Population estimates range from a few tens to several millions. Overall, population estimates most commonly fall in the range of hundreds of thousands, particularly the low...
The occurrence and distribution of selected trace elements in the upper Rio Grande and tributaries in Colorado and Northern New Mexico
Howard E. Taylor, Ronald C. Antweiler, D.A. Roth, T.I. Brinton, D.B. Peart, D. F. Healy
2001, Archives of Environmental Contamination and Toxicology (41) 410-426
Two sampling trips were undertaken in 1994 to determine the distribution of trace elements in the Upper Rio Grande and several of its tributaries. Water discharges decreased in the main stem of the Rio Grande from June to September, whereas dissolved concentrations of trace elements generally increased. This is attributed...
Predictions of hydrothermal alteration within near-ridge oceanic crust from coordinated geochemical and fluid flow models
L.R. Wetzel, Jeff P. Raffensperger, E.L. Shock
2001, Journal of Volcanology and Geothermal Research (110) 319-342
Coordinated geochemical and hydrological calculations guide our understanding of the composition, fluid flow patterns, and thermal structure of near-ridge oceanic crust. The case study presented here illustrates geochemical and thermal changes taking place as oceanic crust ages from 0.2 to 1.0 Myr. Using a finite element code, we model fluid...
Impact of the Conservation Reserve Program on duck recruitment in the U.S. Prairie Pothole Region
Ronald E. Reynolds, Terry L. Shaffer, Randy W. Renner, Wesley E. Newton, Bruce D.J. Batt
2001, Journal of Wildlife Management (65) 765-780
The U.S. Department of Agriculture (USDA)'s Conservation Reserve Program (CRP) resulted in the conversion of about 1.9 million ha of cropland to perennial grass cover in the Prairie Pothole Region of North Dakota, South Dakota, and northeastern Montana by 1992. Many wildlife managers believed this cover would provide benefits to...
Minimum age of the Neoproterozoic Seven Hundred Acre Island Formation and the tectonic setting of the Islesboro Formation, Islesboro block, Maine
David B. Stewart, Robert D Tucker, Robert Ayuso, Daniel R. Lux
2001, Atlantic Geology (37) 41-59
Two plat formal stratigraphic sequences occur on Islesboro, Penobscot Bay, Maine. The older Seven Hundred Acre Island Formation is at least 200 m thick, its base is not exposed, and it makes up fault-bounded blocks of siliceous colour-banded dolomitic marble, muscovite-rich quartzite, coarse-grained splendent muscovite-garnet-staurolite-andalusite schist, and calcareous metapelite, with...
Occurrence of cyanazine compounds in groundwater: Degradates more prevalent than the parent compound
D.W. Kolpin, E.M. Thurman, S. M. Linhart
2001, Environmental Science & Technology (35) 1217-1222
A recently developed analytical method using liquid chromatography/mass spectrometry was used to investigate the occurrence of cyanazine and its degradates cyanazine acid (CAC), cyanazine amide (CAM), deethylcyanazine (DEC), and deethylcyanazine acid (DCAC) in groundwater. This research represents some of the earliest data on the occurrence of cyanazine degradates in groundwater....
Atmospheric regime of dust and salt through 75,000 years of Taylor Dome ice core: Refinement by measurement of major, minor, and trace metal suites
T. K. Hinkley, A. Matsumoto
2001, Journal of Geophysical Research D: Atmospheres (106) 18487-18493
Measurement of absolute and relative amounts of dust and salt deposited in the polar ice record is central to several fields of study, including nutrient delivery, atmospheric deposition of trace elements, past wind strengths, dust provenance, and other aspects of climate and geochemical history. We present a method intended to...
Relating nitrogen sources and aquifer susceptibility to nitrate in shallow ground waters of the United States
B. T. Nolan
2001, Ground Water (39) 290-299
Characteristics of nitrogen loading and aquifer susceptibility to contamination were evaluated to determine their influence on contamination of shallow ground water by nitrate. A set of 13 explanatory variables was derived from these characteristics, and variables that have a significant influence were identified using logistic regression (LR). Multivariate LR models...
Associations of grassland birds with landscape factors in southern Wisconsin
Christine Ribic, D. W. Sample
2001, American Midland Naturalist (146) 105-121
We investigated the association of grassland birds with field- and landscape-level habitat variables in south-central Wisconsin during 1985–1987. Landscape-level variables were measured and digitized at 200, 400 and 800 m from the perimeter of 38 200 m × 100 m strip transects. A mixture of field and landscape variables was...
Experimental infection of nontarget species of rodents and birds with Brucella abortus strain RB51 vaccine
M.C. Januszewski, S.C. Olsen, R. G. McLean, L. Clark, Jack C. Rhyan
2001, Journal of Wildlife Diseases (37) 532-537
The Brucella abortus vaccine strain RB51 (SRB51) is being considered for use in the management of brucellosis in wild bison (Bison bison) and elk (Cervus elaphus) populations in the Greater Yellowstone Area (USA). Evaluation of the vaccine's safety in non-target species was considered necessary prior to field use. Between June 1998 and...
Seabird tissue archival and monitoring project: Protocol for collecting and banking seabird eggs
Geoff Weston-York, Barbara J. Porter, Rebecca S. Pugh, David G. Roseneau, Kristin S. Simac, Paul R. Becker, Lyman K. Thorsteinson, Stephen A. Wise
2001, Report
Archiving biological and environmental samples for retrospective analysis is a major component of systematic environmental monitoring. The long-term storage of carefully selected, representative samples in an environmental specimen bank is an important complement to the real-time monitoring of the environment. These archived samples permit:The use of subsequently developed innovative analytical...
West Nile virus transmission and ecology in birds
Robert G. McLean, S. R. Ubico, Douglas E. Docherty, Wallace R. Hansen, Louis Sileo, T. S. Mcnamara
2001, Annals of the New York Academy of Sciences (951) 54-57
The ecology of the strain of West Nile virus (WNV) introduced into the United States in 1999 has similarities to the native flavivirus, St. Louis encephalitis (SLE) virus, but has unique features not observed with SLE virus or with WNV in the old world. The primary route of transmission for...
Lithologies of the basement complex (Devonian and older) in the National Petroleum Reserve - Alaska
Julie A. Dumoulin
David W. Houseknecht, editor(s)
2001, SEPM Core Workshop Notes (21) 201-214
Rocks of the basement complex (Devonian and older) were encountered in at least 30 exploratory wells in the northern part of the NPRA. Fine-grained, variably deformed sedimentary rocks deposited in a slope or basinal setting predominate and include varicolored (mainly red and green) argillite in the Simpson area, dark argillite...
The role of hybridization in the distribution, conservation and management of aquatic species: Symposium review
John Epifanio, Jennifer L. Nielsen
2001, Reviews in Fish Biology and Fisheries (10) 245-251
This issue of Reviews in Fish Biology and Fisheries contains six papers addressing several critical aspects of hybridization in fishes and aquatic organisms. Hybridization is a phenomenon long recognized in fishes (Hubbs, 1920, 1955; Schwarz, 1981), as well as in other plant and vertebrate taxa, despite some rather dogmatic proclamations...
Geographic variation of PCB congeners in polar bears (Ursus maritimus) from Svalbard east to the Chukchi Sea
M. Andersen, E. Lie, A.E. Derocher, S.E. Belikov, A. Bernhoft, Andrei N. Boltunov, G.W. Garner, J.U. Skaare, Øystein Wiig
2001, Polar Biology (24) 231-238
We present data on geographic variation in polychlorinated biphenyl (PCB) congeners in adult female polar bears (Ursus maritimus) from Svalbard eastward to the Chukchi Sea. Blood samples from 90 free-living polar bears were collected in 1987–1995. Six PCB congeners, penta to octa chlorinated (PCB-99, -118, -153, -156, -180,...
Duck plague epizootics in the United States, 1967-1995
Kathryn A. Converse, Gregory A. Kidd
2001, Journal of Wildlife Diseases (37) 347-357
In 1967, the first confirmed diagnosis of duck plague (DP) in the USA was made from pekin ducks (Anas platyrhynchos domesticus) on commercial duck farms on Long Island, New York. Within 10 mo, DP was confirmed as the cause of death in migratory waterfowl on a Long Island bay. This...
Survival of female wood ducks during brood rearing in Mississippi and Alabama
J. B. Davis, R.M. Kaminski, B.D. Leopold, R. R. Cox Jr.
2001, Journal of Wildlife Management (65) 738-744
Knowledge of survival of female ducks is important for understanding population dynamics and managing hunted species. We estimated survival of female wood ducks (Aix sponsa) during brood rearing in different wetland environments in Mississippi (1996-1999) and Alabama (1998-1999). Survival was 0.90 ± 0.05 (Ŝ ± SE) in Mississippi and 0.92...
Tagging and tracking
Mark N. Landers, A. Westgate, Robert K. Bonde, M.J. Murray
2001, Book chapter, Handbook of Marine Mammal Medicine
No abstract available....