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Page 2968, results 74176 - 74200

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Community Food Webs
D.L. DeAngelis
2002, Book chapter, Encyclopedia of Environmetrics.
Abstract not supplied at this time...
Then and Now
James A. Estes
Richard L. Knight, Suzanne Riedel, editor(s)
2002, Book chapter, Aldo Leopold and the ecological conscience
No abstract available....
Overview and parting shots
J.E. Lovich
B. Tellman, editor(s)
2002, Invasive species in the Sonoran Region. 331-335
No abstract available at this time...
USFWS demonstration fees
Jonathan Taylor, Jerry Vaske, Maureen Donnelly, Lori Shelby
2002, Report
This study examined National Wildlife Refuge (NWR) visitors' reactions to changes in fees implemented as part of the fee demonstration program. Visitors' evaluations of the fees paid were examined in addition to their beliefs about fees and the fee demonstration program, and the impact of fees paid on their intention...
Identifying a large landslide with small displacements in a zone of coseismic tectonic deformation; the Villa Del Monte landslide triggered by the 1989 Loma Prieta, California, earthquake
David K. Keefer, Edwin L. Harp, Gary B. Griggs, Stephen G. Evans, Jerome V. DeGraff
2002, Reviews in Engineering Geology (15) 117-134
The Villa Del Monte landslide was one of 20 large and complex landslides triggered by the 1989 LomaPrieta, California, earthquake in a zone of pervasive coseismicground cracking near the fault rupture. The landslide was...
Comparison of traditional and molecular methods for detection of Renibacterium salmoninarum
R.J. Pascho, D.G. Elliott, D.M. Chase
C.O. Cunningham, editor(s)
2002, Book chapter, Molecular diagnosis of salmonid diseases
Bacterial kidney disease (BKD) caused by Renibacterium salmoninarum occurs in most parts of the world where wild or cultured salmonid fishes are present. Several extensive reviews have been written on the pathogen and the disease (Fryer and Sanders, 1981; Austin and Austin, 1987; Elliott et al.,...
Controls on facies and sequence stratigraphy of an upper Miocene carbonate ramp and platform, Melilla basin, NE Morocco
Kevin J. Cunningham, Luke S. Collins
2002, Sedimentary Geology (146) 285-304
Upwelling of cool seawater, paleoceanographic circulation, paleoclimate, local tectonics and relative sea-level change controlled the lithofacies and sequence stratigraphy of a carbonate ramp and overlying platform that are part of a temporally well constrained carbonate complex in the Melilla basin, northeastern Morocco. At Melilla, from oldest to youngest, a third-order...
Comparisons of likelihood and machine learning methods of individual classification
B. Guinand, A. Topchy, K.S. Page, M. K. Burnham-Curtis, W.F. Punch, K.T. Scribner
2002, Journal of Heredity (93) 260-269
Classification methods used in machine learning (e.g., artificial neural networks, decision trees, and k-nearest neighbor clustering) are rarely used with population genetic data. We compare different nonparametric machine learning techniques with parametric likelihood estimations commonly employed in population genetics for purposes of assigning individuals to their population...
Breeding season of wolves, Canis lupus, in relation to latitude
L. David Mech
2002, Canadian Field-Naturalist (116) 139
A significant relationship was found between Wolf (Canis lupus) breeding dates and latitudes between 12 deg. and 80 deg. N, with Wolves breeding earlier at lower latitudes, probably because of differences in seasonality....
Interactions of an insecticide with competition and pond drying in amphibian communities
M.D. Boone, R. D. Semlitsch
2002, Ecological Applications (12) 307-316
Amphibian populations are often imbedded in agricultural landscapes. Therefore the potential for contamination of their habitat is considerable. Our study examined the effects of an insecticide (carbaryl, a neurotoxin), on larval amphibian communities experiencing natural stresses of competition for resources, predation, and pond drying. In a set of experimental ponds,...
Satellite mapping of surface biophysical parameters at the biome scale over the North American grasslands: A case study
B.K. Wylie, D. J. Meyer, L.L. Tieszen, S. Mannel
2002, Remote Sensing of Environment (79) 266-278
Quantification of biophysical parameters is needed by terrestrial process modeling and other applications. A study testing the role of multispectral data for monitoring biophysical parameters was conducted over a network of grassland field sites in the Great Plains of North America. Grassland biophysical parameters [leaf area index (LAI), fraction of...
An evaluation of long-term preservation methods for brown bear (Ursus arctos) faecal DNA samples
M.A. Murphy, L.P. Waits, K.C. Kendall, S.K. Wasser, J.A. Higbee, R. Bogden
2002, Conservation Genetics (3) 435-440
Relatively few large-scale faecal DNA studies have been initiated due to difficulties in amplifying low quality and quantity DNA template. To improve brown bear faecal DNA PCR amplification success rates and to determine post collection sample longevity, five preservation methods were evaluated: 90% ethanol, DETs buffer, silica-dried, oven-dried stored at...
Improved method for quantifying the avicide 3-chloro-p-toluidine hydrochloride in bird tissues using a deuterated surrogate/GC/MS method
Randal S. Stahl, Thomas W. Custer, P. A. Pochop, J. J. Johnston
2002, Journal of Agricultural and Food Chemistry (50) 732-738
A method using a deuterated surrogate of the avicide 3-chloro-p-toluidine hydrochloride (CPTH) was developed to quantify the CPTH residues in the gastrointestinal (GI) tract and breast muscle tissues in birds collected in CPTH-baited sunflower and rice fields. This method increased the range of a previous surrogate/gas chromatography/mass spectroscopy method...
Determining mineral weathering rates based on solid and solute weathering gradients and velocities: Application to biotite weathering in saprolites
A. F. White
2002, Chemical Geology (190) 69-89
Chemical weathering gradients are defined by the changes in the measured elemental concentrations in solids and pore waters with depth in soils and regoliths. An increase in the mineral weathering rate increases the change in these concentrations with depth while increases in the weathering velocity decrease the change. The solid-state...
Seasonal changes in androgen levels in stream- and hatchery-reared Atlantic salmon parr and their relationship to smolting
J. M. Shrimpton, S. D. McCormick
2002, Journal of Fish Biology (61) 1294-1304
In stream-reared Atlantic salmon Salmo salar, plasma androgens were significantly greater in mature male parr than immature males and females in October, but had declined by January and did not differ significantly from immature fish throughout the spring. Immature fish in March were significantly larger and had greater gill Na+,K+-ATPase...
Imaging the mantle beneath Iceland using integrated seismological techniques
R. M. Allen, G. Nolet, W. J. Morgan, K. Vogfjord, B. H. Bergsson, P. Erlendsson, G.R. Foulger, S. Jakobsdottir, B.R. Julian, M. Pritchard, S. Ragnarsson, R. Stefansson
2002, Journal of Geophysical Research B: Solid Earth (107) ESE 3-1-ESE 3-16
Using a combination of body wave and surface wave data sets to reveal the mantle plume and plume head, this study presents a tomographic image of the mantle structure beneath Iceland to 400 km depth. Data comes primarily from the PASSCAL-HOTSPOT deployment of 30 broadband instruments over a period of...