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...
Channel response to sediment wave propagation and movement, Redwood Creek, California, USA
Mary Ann Madej, Vicki Ozaki
1996, Earth Surface Processes and Landforms (21) 911-927
Redwood Creek, north coastal California, USA, has experienced dramatic changes in channel configuration since the 1950s. A series of large floods (in 1955, 1964, 1972 and 1975) combined with the advent of widespread commercial timber harvest and road building resulted in extensive erosion in the basin and contributed high sediment...
Modeling gas transfer and biological respiration in a recirculating aquaculture system
L. G. Wood, Barnaby J. Watten, C. G. Haugh, G. S. Libey, T. A. Dillaha
1996, Aquacultural Engineering (15) 359-379
Recirculating aquaculture system applications of oxygen absorption equipment require consideration of the combined effects of the system's physical, chemical and biological components. Interactions of this type were modeled within a recirculating system incorporating a mixed-flow type rearing vessel, a multi-tube clarifier, a rotating biological contactor (RBC) and a U-tube oxygenator....
Results of Bayesian methods depend on details of implementation: An example of estimating salmon escapement goals
Milo D. Adkison, R. M. Peterman
1996, Fisheries Research (25) 155-170
Bayesian methods have been proposed to estimate optimal escapement goals, using both knowledge about physical determinants of salmon productivity and stock-recruitment data. The Bayesian approach has several advantages over many traditional methods for estimating stock productivity: it allows...
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...
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...
Trophic analysis of ruffe (Gymnocephalus cernuus) and white perch (Morone americana) in a Lake Superior Coastal food web, using stable isotope techniques
M.E. Sierszen, J.R. Keough, C.A. Hagley
1996, Journal of Great Lakes Research (22) 436-443
We examined the trophic roles of two nonindigenous species, ruffe (Gymnocephalus cernuus) and white perch (Morone americana), in the food web of a western Lake Superior coastal wetland, using stable isotope techniques. The δ15N signature of ruffe was similar to published...
Contaminant trends in lake trout and walleye from the Laurentian Great Lakes
David S. DeVault, Robert J. Hesselberg, Paul W. Rodgers, Timothy J. Feist
1996, Journal of Great Lakes Research (22) 884-895
Trends in PCBs, DDT, and other contaminants have been monitored in Great Lakes lake trout and walleye since the 1970s using composite samples of whole fish. Dramatic declines have been observed in concentrations of PCB, ΣDDT, dieldrin, and oxychlordane, with declines initially following first order loss kinetics. Mean PCB concentrations...
Similarities and life cycle distributions of floras of 22 national parks in the midwestern United States
James P. Bennett
1996, Natural Areas Journal (16) 303-309
Twenty-two midwestern U.S. national parks were studied to examine the similarities of their floras and analyses of the floras in each national park were used to construct groupings of these smaller sample areas at various similarity levels in order to classify larger floristic areas. The parks were not on average...
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...
Otoliths reveal a diverse age structure for humper lake trout in Lake Superior
Mary K. Burnham-Curtis, Charles R. Bronte
1996, Transactions of the American Fisheries Society (125) 844-851
Humpers are one of at least three morphological variants of wild lake trout Salvelinus namaycush that maintain self-sustaining populations in Lake Superior. In an early study, bumpers from Isle Royale were shown to have a sharply truncated age distribution that was attributed to high mortality after age 11, but we suspected that...
Water resources of Lincoln County, Wyoming
C. A. Eddy-Miller, Maria Plafcan, M. L. Clark
1996, Water-Resources Investigations Report 96-4246
Streamflow and ground-water quantity and quality data were collected and analyzed, 1993 through 1995, and historical data were compiled to summarize the water resources of Lincoln County.Deposits of Quaternary age, in the valleys of the Bear River and Salt River, had the most well development of...
Bacteriological quality of ground water used for household supply, Lower Susquehanna River basin, Pennsylvania and Maryland
Tammy M. Bickford, Bruce D. Lindsey, M.R. Beaver
1996, Water-Resources Investigations Report 96-4212
This report describes the bacteriological results of a ground-water study conducted from 1993 to 1995 as part of the U.S. Geological Survey's National Water-Quality Assessment Program in the Lower Susquehanna River Basin study unit. Water samples collected from 146 household supply wells were analyzed for fecal-indicator organisms including total coliform,...
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...
An introduction to the Woodworth Study Area
Douglas H. Johnson, Kenneth F. Higgins, Robert O. Woodward
1996, Conference Paper, Proceedings of the North Dakota Academy of Science
The Woodworth Study Area (WSA) was purchased by the U.S. Fish and Wildlife Service (FWS) during the early 1960's as a waterfowl production area. Unlike most such areas, its primary purpose was not to provide waterfowl breeding habitat directly, but instead it was dedicated for use as a research area...
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...
Elk response to the La Mesa fire and current status in the Jemez Mountains
Craig D. Allen
Craig D. Allen, editor(s)
1996, General Technical Report RM-GTR-286
Faunal remains in local archeological sites and historic information suggest that elk populations in the Jemez Mountains were low from ca. 1200 A.D. through ca. 1900 A.D., when they were extirpated from this region. Elk were reintroduced to the Jemez country in 1948 and 1964- 1965, and their population apparently...
Sediment inflow to the delta from the Sacramento and San Joaquin Rivers
R.N. Oltmann
1996, Interagency Ecological Program Newsletter (9) 22-23
USGS routinely measures the daily suspended sediment load entering the delta with the flows of the Sacramento and San Joaquin rivers. Most of the suspended sediment that flows into the delta is carried by these two rivers, but it also enters from Yolo Bypass; the Mokelumne, Calaveras, and Cosumnes rivers;...
A bayesian approach to classification criteria for spectacled eiders
B .L. Taylor, P.R. Wade, R.A. Stehn, J.F. Cochrane
1996, Ecological Applications (6) 1077-1089
To facilitate decisions to classify species according to risk of extinction, we used Bayesian methods to analyze trend data for the Spectacled Eider, an arctic sea duck. Trend data from three independent surveys of the Yukon-Kuskokwim Delta were analyzed individually and in combination to yield posterior distributions for population growth...
A preliminary evaluation of sediment quality assessment values for freshwater ecosystems
Sherri L. Smith, Donald D. MacDonald, Karen A. Keenleyside, Christopher G. Ingersoll, L. Jay Field
1996, Journal of Great Lakes Research (22) 624-638
Sediment quality assessment values were developed using a weight of evidence approach in which matching biological and chemical data from numerous modelling, laboratory, and field studies performed on freshwater sediments were compiled and analyzed. Two assessment values (a threshold effect level (TEL) and a probable effect level(PEL)) were derived for...
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...
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 and evaluation of sediment effect concentrations for the amphipod Hyalella azteca and the midge Chironomus riparius
Christopher G. Ingersoll, Pamela S. Haverland, Eric L. Brunson, Timothy J. Canfield, F. James Dwyer, Chris Henke, Nile E. Kemble, David R. Mount, Richard G. Fox
1996, Journal of Great Lakes Research (22) 602-623
Procedures are described for calculating and evaluating sediment effect concentrations (SECs) using laboratory data on the toxicity of contaminants associated with field-collected sediment to the amphipod Hyalella azteca and the midge Chironomus riparius. SECs are defined as the concentrations of individual contaminants in sediment below which toxicity is rarely observed...
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...
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...
