40AR/39Ar ages of six Apollo 15 impact melt rocks by laser step heating
G. Brent Dalrymple, Graham Ryder
1991, Geophysical Research Letters (18) 1163-1166
We have obtained 15 high resolution (21–51 step) 40Ar/39 age spectra on six Apollo 15 impact melt rocks of different compositions using a continuous laser system on submilligram subsamples and on single crystal plagioclase clasts. Four of the six samples gave reproducible age spectra with well-defined intermediate temperature plateaus over 48% or...
Aquatic and wetland plants of Missouri
D.L. Combs, R.D. Drobney
1991, Book
No abstract available....
Quaternary history of some southern and central Rocky Mountain basins
Marith C. Reheis, Robert C. Palmquist, S.S. Agard, Cheryl Jaworowski, Brainerd Mears, Richard F. Madole, Alan R. Nelson, Gerald Osborn
1991, Book chapter, Quaternary nonglacial geology
This chapter summarizes the current state of late Cenozoic stratigraphic knowledge in some Rocky Mountain basins (here defined as the structurally low portions of major drainage basins) that have been studied in...
The Briggs Creek Amphibolite, Klamath Mountains, Oregon: Its origin and dispersal
Robert G. Coleman, Marvin A. Lanphere
1991, New Zealand Journal of Geology and Geophysics (34) 271-284
The Briggs Creek Amphibolite (BCA) in southwestern Oregon is an allochthonous slice of metamorphosed oceanic crust emplaced during the Nevadan orogenic event. Even though the evidence is not clear, the authors prefer to have the protolith for the BCA formed in a back‐arc basin contemporaneously as part of the Josephine...
Great lakes embryo mortality, edema, and deformities syndrome (glemeds) in colonial fish-eating birds: Similarity to chick-edema disease
Michael Gilbertson, Timothy J. Kubiak, James P. Ludwig, Glen Fox
1991, Journal of Toxicology and Environmental Health (33) 455-520
Several species of colonial fish-eating birds nesting in the Great Lakes basin Includ-ing herring gulls, common terns and double-crested cormorants, have exhibited chronic impairment of reproduction. In addition to eggshell thinning caused by high levels of DDT and metabolites, the reproductive impairment is characterized by high embryonic and chick mortality, edema,...
Initiation processes and flow evolution of turbidity currents: Implications for the depositional record
William R. Normark, David J. W. Piper
Robert H. Osborne, editor(s)
1991, Book chapter, From shoreline to abyss: Contributions in marine geology in honor of Francis Parker Shepard
Interpretations of sea-level change and source-area tectonism from the character of turbidite deposits require knowledge of the sediment source, the flow-initiation process, how the turbidity current evolved during flow, and what flow phases were associated with deposition. The flow responds to shape and size characteristics of both the erosional pathway...
Particulate and colloidal organic material in Pueblo Reservoir, Colorado--Influence of autochthonous source on chemical composition
J. F. Ranville, R.A. Harnish, D.M. McKnight
R.A. Baker, editor(s)
1991, Book chapter, Organic substances and sediments in water
No abstract available. ...
Tidal-flow, circulation, and flushing changes caused by dredge and fill in Hillsborough Bay, Florida
C. R. Goodwin
1991, Open-File Report 88-76
No abstract available....
Regressive coastal deposits on Quaternary continental shelves: Preservation and legacy
Michael E. Field, Fabio Trincardi
Robert H. Osborne, editor(s)
1991, Book chapter, From shoreline to abyss: Contributions in marine geology in honor of Francis Parker Shepard
Regressive coastal deposits containing internal downlapping surfaces are common on continental shelves of the world. Through theoretical considerations and evaluation of examples from the literature and our own studies in California and Italy, we have examined the conditions that lead both to the formation and preservation of these deposits.Coastal downlapping...
Valley oak seedling growth associated with selected grass species
K.C. Danielsen, W. L. Halvorson
1991, General Technical Report PSW-126
No abstract available at this time...
Dabbling duck recruitment in relation to habitat and predators at Union Slough National Wildlife Refuge, Iowa
J. P. Fleskes, Erwin E. Klaas
1991, Fish and Wildlife Technical Report 32
No abstract available at this time...
Common and scientific names of fishes from the United States and Canada: Appendix 2, Exotic Fishes
W.R. Courtenay, Dawn P. Jennings, J.D. Williams
1991, American Fisheries Society Special Publication 20
Abstract not supplied at this time...
Subyearling American shad concentrate in swifter current in the upper Delaware River
R. M. Ross, T. W. H. Backman
1991, Research Information Bulletin 58
No abstract available....
Validation of estimating food intake in gray wolves by 22Na turnover
Glenn D. DelGiudice, Laurel S. Duquette, Ulysses S. Seal, L. David Mech
1991, Journal of Wildlife Management (55) 59-71
We studied 22sodium (22Na) turnover as a means of estimating food intake in 6 captive, adult gray wolves (Canis lupus) (2 F, 4 M) over a 31-day feeding period. Wolves were fed white-tailed deer (Odocoileus virginianus) meat only. Mean mass-specific exchangeable Na pool was 44.8 ± 0.7 mEq/kg; there was no...
Selectivity and effectiveness of extractants used to release metals associated with organic matter
C. S.E. Papp, L.H. Filipek, K. S. Smith
1991, Applied Geochemistry (6) 349-353
Partial extraction procedures can be used to release metals associated with organic matter in natural materials. Reagents commonly employed for this purpose include hydrogen peroxide, Na hypochlorite and Na pyrophosphate. This study tested the selectivity of these reagents by comparing the amount...
Survival and band recovery rates of sympatric grey ducks and mallards in New Zealand
Tom Caithness, Murray Williams, James D. Nichols
1991, Journal of Wildlife Management (55) 111-118
We used band recovery data from grey ducks (Anas superciliosa) and mallards. (A. platyrhynchos) banded sympatrically during 1957-74 to estimate annual survival and recovery rates. Young birds tended to have higher recovery rates and lower survival rates than adults for both species. Both species showed strong evidence of year-to-year variation...
MS-222 used to separate phase I striped bass with uninflated swim bladders
A. Henderson-Arzapalo, J. Hawkinson, P. Keyes
1991, Research Information Bulletin 8
No abstract available at this time...
Predicting bighorn lamb survival from weather patterns in Canyonlands National Park, Utah
C. L. Douglas
1991, Technical Report CPSU/UNLV 031/08
No abstract available at this time...
Fission-track age (400,000 yr) of the Rockland tephra, based on inclusion of zirco grains lacking fossil fission tracks
C.E. Meyer, A.M. Sarna-Wojcicki, John W. Hillhouse, M.J. Woodward, J. L. Slate, D. H. Sorg
1991, Quaternary Research (35) 367-382
A zircon fission-track age of about 400,000 yr B.P. has been determined for the Rockland tephra, a widespread pyroclastic layer in northern California and western Nevada. New ages of zircon separates from both proximal and distal exposures of this layer range from 370,000 to 460,000 yr; ages of the best...
Computerized data base for exotic fishes: the western United States
J.D. Williams, Dawn P. Jennings
1991, California Fish and Game (77) 86-93
Abstract not supplied at this time...
Scale, variable density, and conservation planning for mammalian carnivores
C. Schonewald-Cox, R. Azari, S. Blume
1991, Conservation Biology (5) 491-495
Many mammalian carnivores are in local or global decline. To slow this process, continued planning to protect these species is warranted, Still, the data bases that we have at our disposal do not adequately document population requirements for space at scales appropriate for conservation planning. To illustrate this problem, we...
The status of the Red Hills salamander Phaeognathus hubrichti, Alabama, USA, 1976–1988
C.K. Dodd Jr.
1991, Biological Conservation (55) 57-75
A total of 144 sites in the Red Hills Physiographic Province in south-central Alabama, USA, were surveyed in 1988 for burrows of the Red Hills salamander Phaeognathus hubrichti. Of 92 sites surveyed in 1976, no change occurred in the habitat at 54 sites, conditions improved at 19 sites and deteriorated at...
Evaluation of a mark-recapture method for estimating mortality and migration rates of stratified populations
R.M. Dorazio, P.J. Rago
1991, Canadian Journal of Fisheries and Aquatic Sciences (48) 254-260
We simulated mark–recapture experiments to evaluate a method for estimating fishing mortality and migration rates of populations stratified at release and recovery. When fish released in two or more strata were recovered from different recapture strata in nearly the same proportions, conditional recapture probabilities were estimated outside the [0, 1]...
Stocking of hatchery-reared striped bass in the Patuxent River, Maryland: survival, relative abundance, and cost-effectiveness
R.M. Dorazio, B.M. Florence, C.M. Wooley
1991, North American Journal of Fisheries Management (11) 435-442
Hatchery-reared fingerlings of striped bass Morone saxatilis were tagged, stocked, and recovered in the Patuxent River, Maryland, to estimate their survival and abundance relative to wild young of the year and to compare the costs and benefits of stocking phase-I (35–50 mm, total length) and phase-II (150–200 mm) fish. About 100,000 phase-I...
The influence of ambient salinity on routine metabolism in the teleost Cyprinodon variegatus Lacepède
F.G. Nordlie, S. J. Walsh, D. C. Haney, T.F. Nordlie
1991, Journal of Fish Biology (38) 115-122
Routine metabolism of the euryhaline cyprinodontid Cyprinodon variegatus Lacepede was measured at a series of ambient salinities ranging from fresh water through 100‰. Fish used had been sequentially acclimated to the test salinities (ambient temperature of 20±1° C and a 12: 12 L: D schedule). Routine metabolic rates were highest at ambient salinities...
