Use of non-lethal procedures to detect and monitor Aeromonas salmonicida in potentially endangered or threatened populations of migrating and post-Spawning salmon
R. C. Cipriano, L.A. Ford, J.D. Teska, J. H. Schachte, C. Petrie, B.M. Novak, D.E. Flint
1996, Diseases of Aquatic Organisms (27) 233-236
Non-lethal assay of mucus was assessed for detection of Aeromonas salmonicida among feral populations of salmon returning to the Salmon River (Altmar, NY, USA). A. salmonicida was isolated from returns of 2 year classes of coho Oncorhynchus kisutch and chinook O. tshawytscha salmon. Data suggested that non-lethal assay of mucus was comparable to standard lethal procedures used...
Writing user selectable data on the extended header of seismic recordings made on the Texas Instruments DFS-V
W.C. Robinson
1996, Marine Geology (135) 159-162
A circuit has been developed to allow the writing of up to 192 digits of user-selectable data on a portion of tape called extended header, which is always available for use before each DFS-V seismic record is written. Such data could include navigation information, air gun and streamer depth and...
Successful performance of a base-isolated hospital building during the 17 January 1994 Northridge earthquake
M. Çelebi
1996, Structural Design of Tall Buildings (5) 95-109
The purpose of this paper is to examine the response records and thereby the performance of the base-isolated University of Southern California (USC) hospital building during the Ms = 6·8 Northridge (California) earthquake of 17 January 1994. The data retrieved from the building is the first set of data from any base-isolated...
Comparison of gas chromatography/mass spectrometry and immunoassay techniques on concentrations of atrazine in storm runoff
Michael J. Lydy, D.S. Carter, Charles G. Crawford
1996, Archives of Environmental Contamination and Toxicology (31) 378-385
Gas chromatography/mass spectrometry (GC/MS) and enzyme-linked immunosorbent assay (ELISA) techniques were used to measure concentrations of dissolved atrazine in 149 surface-water samples. Samples were collected during May 1992–September 1993 near the mouth of the White River (Indiana) and in two small tributaries of the river. GC/MS was performed on a...
Alternative models of climatic effects on sockeye salmon, Oncorhynchus nerka, productivity in Bristol Bay, Alaska, and the Fraser River, British Columbia
M. Adkison, R. M. Peterman, M. Lapointe, D. Gillis, J. Korman
1996, Fisheries Oceanography (5) 137-152
We compare alternative models of sockeye salmon, Oncorhynchus nerka, productivity (returns per spawner) using more than 30 years of catch and escapement data for Bristol Bay, Alaska, and the Fraser River, British Columbia. The models examined include several alternative forms of models that incorporate climatic influences as well as models not...
The 25 March 1993 Scotts Mills, Oregon, earthquake and aftershock sequence: Spatial distribution, focal mechanisms, and the mount angel fault
G.C. Thomas, R. S. Crosson, D. L. Carver, T.S. Yelin
1996, Bulletin of the Seismological Society of America (86) 925-935
The 25 March 1993 ML = 5.7 crustal earthquake near Scotts Mills, Oregon, was the largest earthquake to occur in the Pacific Northwest in over a decade. The mainshock was located at 45.033°N, 122.586°W and at a depth of about 15.1 km, based on arrival...
The long-term salinity field in San Francisco Bay
R.J. Uncles, D. H. Peterson
1996, Continental Shelf Research (16) 2005-2039
Data are presented on long-term salinity behaviour in San Francisco Bay, California. A two-level, width averaged model of the tidally averaged salinity and circulation has been written in order to interpret the long-term (days to decades) salinity variability. The model has been used to simulate daily averaged salinity in the...
Estimating the effective spatial resolution of an AVHRR time series
D. J. Meyer
1996, International Journal of Remote Sensing (17) 2971-2980
A method is proposed to estimate the spatial degradation of geometrically rectified AVHRR data resulting from misregistration and off-nadir viewing, and to infer the cumulative effect of these degradations over time. Misregistrations are measured using high resolution imagery as a geometric reference, and pixel sizes are computed directly from satellite...
Calculation of earthquake rupture histories using a hybrid global search algorithm: Application to the 1992 Landers, California, earthquake
S. Hartzell, P. Liu
1996, Physics of the Earth and Planetary Interiors (95) 79-99
A method is presented for the simultaneous calculation of slip amplitudes and rupture times for a finite fault using a hybrid global search algorithm. The method we use combines simulated annealing with the downhill simplex method to produce a more efficient search algorithm then either of the two constituent parts....
Using remote sensing and GIS techniques to estimate discharge and recharge. fluxes for the Death Valley regional groundwater flow system, USA
F. A. D’Agnese, C.C. Faunt, Turner A. Keith
1996, IAHS-AISH Publication 503-511
The recharge and discharge components of the Death Valley regional groundwater flow system were defined by remote sensing and GIS techniques that integrated disparate data types to develop a spatially complex representation of near-surface hydrological processes. Image classification methods were applied to multispectral satellite data to produce a vegetation map....
A test of vegetation-related indicators of wetland quality in the prairie pothole region
H.A. Kantrud, W.E. Newton
1996, Journal of Aquatic Ecosystem Health (5) 177-191
This study was part of an effort by the U.S. Environmental Protection Agency to quantitatively assess the environmental quality or 'health' of wetland resources on regional and national scales. During a two-year pilot study, we tested selected indicators of wetland quality in the U.S. portion of the prairie pothole region...
Unrealistic parameter estimates in inverse modelling: A problem or a benefit for model calibration?
E. P. Poeter, M. C. Hill
1996, IAHS-AISH Publication (237) 277-285
Estimation of unrealistic parameter values by inverse modelling is useful for constructed model discrimination. This utility is demonstrated using the three-dimensional, groundwater flow inverse model MODFLOWP to estimate parameters in a simple synthetic model where the true conditions and character of the errors are completely known. When a poorly constructed...
The stable oxygen and carbon isotopic record from a coral growing in Florida Bay: a 160 year record of climatic and anthropogenic influence
Peter K. Swart, Genevieve F. Healy, Richard E. Dodge, Philip Kramer, J. Harold Hudson, Robert B. Halley, Michael B. Robblee
1996, Palaeogeography, Palaeoclimatology, Palaeoecology (123) 219-237
A 160 year record of skeletal δ13C and δ18O was examined in a specimen of the coral Solenastrea bournonigrowing in Florida Bay. Variations in the δ18O of the skeleton can be correlated to changes in salinity while changes in the δ13C reflect cycling of organic material within the Bay. Based on...
Maximum likelihood estimation for the double-count method with independent observers
Bryan F.J. Manly, Lyman L. McDonald, Gerald W. Garner
1996, Journal of Agricultural, Biological, and Environmental Statistics (1) 170-189
Data collected under a double-count protocol during line transect surveys were analyzed using new maximum likelihood methods combined with Akaike's information criterion to provide estimates of the abundance of polar bear (Ursus maritimus Phipps) in a pilot study off the coast of Alaska. Visibility biases were corrected by modeling the...
Comparison of the uptake of dioxin-like compounds by caged channel catfish and semipermeable membrane devices in the Saginaw River, Michigan
Robert W. Gale, James N. Huckins, Jimmie D. Petty, Paul H. Peterman, Lisa L. Williams, Douglas Morse, Ted R. Schwartz, Donald E. Tillitt
1996, Environmental Science & Technology (31) 178-187
Elevated concentrations of planar, halogenated hydrocarbons have been linked to reproductive problems in a variety of fish-eating birds and mammals in the Great Lakes and in particular Saginaw Bay. Currently, there are no accurate procedures to assess bioavailability of these contaminants. Polychlorinated dibenzo-p-dioxins and dibenzofurans and mono- and non-ortho-chloro-substituted biphenyls...
An approach for using AVHRR data to monitor U.S. great plains grasslands
B. C. Reed, Thomas R. Loveland, L.L. Tieszen
1996, Geocarto International (11) 13-22
Environmental monitoring requires regular observations regarding the status of the landscape- The concept behind most monitoring efforts using satellite data involve deriving normalized difference vegetation index (NDVI) values or accumulating the NDVI over a specified time period. These efforts attempt to estimate the continuous growth of green biomass by using...
Phylogenetic relationships within the Alcidae (Charadriiformes: Aves) inferred from total molecular evidence
Vicki L. Friesen, Allan J. Baker, John F. Piatt
1996, Molecular Biology and Evolution (13) 359-367
The Alcidae is a unique assemblage of Northern Hemisphere seabirds that forage by "flying" underwater. Despite obvious affinities among the species, their evolutionary relationships are unclear. We analyzed nucleotide sequences of 1,045 base pairs of the mitochondrial cytochrome b gene and allelic profiles for 37 allozyme loci in all 22...
Geometry of the 1954 Fairview Peak-Dixie Valley earthquake sequence from a joint inversion of leveling and triangulation data
K.M. Hodgkinson, R.S. Stein, G. Marshall
1996, Journal of Geophysical Research B: Solid Earth (101) 25437-25457
In 1954, four earthquakes greater than Ms = 6.0 occurred within a 30-km radius and in a period of 6 months. Elevation and angle changes calculated from repeated leveling and triangulation surveys which span the coseismic period provide constraints on the fault geometries and coseismic slip of the faults which were activated....
Mortality of passerines adjacent to a North Carolina corn field treated with granular carbofuran
Tom Augspurger, Milton R. Smith, Carol U. Meteyer, Kathryn A. Converse
1996, Journal of Wildlife Diseases (32) 113-116
Red-winged blackbirds (Agelaius phoeniceus) were collected during an epizootic in southeastern North Carolina (USA). Activity of brain cholinesterase (ChE) was inhibited by 14 to 48% in three of five specimens, and returned to normal levels after incubation. Gastrointestinal tracts were analyzed for 30...
Bottom characteristics of an ocean disposal site off Honolulu, Hawaii: time-based navigational trackline data managed by routes and events
Florence L. Wong, Michael R. Hamer, Monty A. Hampton, Michael E. Torresan
1996, Conference Paper, 1996 ESRI user conference: proceedings
No abstract available...
Use of 2D and 3D GIS in well selection and interpretation of nitrate data, central Nebraska, USA
Ingrid M. Verstraeten
1996, IAHS-AISH Publication 585-591
Nonpoint-source contamination of the principal aquifers in a 7800 km2 area of central Nebraska was evaluated utilizing aquifer condition, well depth, soil type, and physiographical and land use settings. A two-dimensional geographical information system linked with a three-dimensional geological visualization and analytical program was used in the random selection of...
Factors affecting herbicide yields in the Chesapeake Bay watershed, June 1994
R.A. Hainly, J.M. Kahn
1996, Water Resources Bulletin (32) 965-984
Median concentrations and instantaneous yields of alachlor, metolachlor, atrazine, cyanazine, and simazine were generally highest at sites in the Lower Susquehanna River Basin and in agricultural subbasins. Instantaneous herbicide yields are related to land use, hydrogeologic setting, streamflow yield, and agricultural row cropping practices. The significance of these relations may...
The 1992 M=7 Cape Mendocino, California, earthquake: Coseismic deformation at the south end of the Cascadia megathrust
M.H. Murray, G.A. Marshall, M. Lisowski, R.S. Stein
1996, Journal of Geophysical Research B: Solid Earth (101) 17707-17725
We invert geodetic measurements of coseismic surface displacements to determine a dislocation model for the April 25, 1992, M = 7 Cape Mendocino, California, earthquake. The orientation of the model slip vector, which nearly parallels North America-Juan de Fuca relative plate convergence, and the location and orientation of the model fault relative...
Water-vapor movement through unsaturated alluvium in Amargosa Desert near Beatty, Nevada - Current understanding and continuing studies: A section in Joint US Geological Survey, US Nuclear Regulatory Commission workshop on research related to low-level radioactive waste disposal, May 4-6, 1993, National Center, Reston, Virginia; Proceedings (WRI 95-4015)
David E. Prudic
Peter R. Stevens, Thomas J. Nicholson, editor(s)
1996, Report, Joint US Geological Survey, US Nuclear Regulatory Commission workshop on research related to low-level radioactive waste disposal, May 4-6, 1993, National Center, Reston, Virginia; Proceedings (WRI 95-4015)
Disposal of low-level radioactive wastes has been a concern since the 1950's. These wastes commonly are buried in shallow trenches (Fischer, 1986, p. 2). Water infiltrating into the trenches is considered the principal process by which contaminants are transported away from the buried wastes, although gaseous transport in some areas...
Geohydrology and water quality of stratified-drift aquifers in the middle Connecticut River basin, west-central New Hampshire
S. M. Flanagan
1996, Water-Resources Investigations Report 94-4181
A study was done by the U.S. Geological Survey, in cooperation with the New Hampshire Department of Environmental Services, Water Resources Division, to describe the geohydrology and water quality of stratified-drift aquifers in the Middle Connecticut River Basin, west-central New Hampshire Stratified-drift aquifers discontinuously underlie 123 mi2 (square miles) of...
