Diel feeding ecology of three species of aquatic insects
J. H. Johnson
1995, Journal of Freshwater Ecology (10) 183-188
Aspects of the diel feeding ecology of the odonate nymphs Anax Junius and Ischnura verticalis and the ephemeropteran Callibaetis fluctuans were examined over a 24-h period in a small pond. Detrital material was the primary food of both A. Junius and I. verticalis. Aquatic insects (mainly C. fluctuans) were the second ranking prey in the diel diet of A. Junius, whereas ostracods...
Silurian tectonic history of Penobscot Bay region, Maine
D. B. Stewart, J. D. Unger, D. R. Hutchinson
1995, Atlantic Geology (31) 67-79
Early Paleozoic amalgamation of composite terranes was contemporaneous at widely separated regions that were later accreted to either ancestral North America or to Gondwana as those two continents approached each other. Peri-Gondwanan terranes formed from Late Cambrian and Early Ordovician rocks were amalgamated in the Late Ordovician and Early Silurian...
Finite-fault analysis of the 1979 March 14 Petatlan, Mexico, earthquake using teleseismic P waveforms
C. Mendoza
1995, Geophysical Journal International (121) 675-683
Vertical, teleseismic P waves recorded for the 1979 March 14 Petatlan, Mexico, earthquake were used to derive the distribution of coseismic slip using a linear finite-fault inversion scheme that solves for the amount of slip in each of a series of consecutive time windows. Data recorded by six stations of the...
Analysis and detection of the new corn herbicide acetochlor in river water and rain
Paul D. Capel, Lin Ma, B. R. Schroyer, Steven J. Larson, T.A. Gilchrist
1995, Environmental Science & Technology (29) 1702-1705
No abstract available....
Relations between atmospheric circulation and mass balance of South Cascade Glacier, Washington, USA
G. J. McCabe Jr., A. G. Fountain
1995, Arctic and Alpine Research (27) 226-233
The yearly net mass balance of South Cascade Glacier, Washington, has decreased since the mid-1970s. Results show that the decrease is primarily caused by a significant decrease in the winter mass balance. The decrease in winter mass balance is caused, in part, by changes in winter mean atmospheric circulation that...
Tectonic implications of post-30 Ma Pacific and North American relative plate motions
R. G. Bohannon, T. Parsons
1995, Geological Society of America Bulletin (107) 937-959
The Pacific plate moved northwest relative to North America since 42 Ma. The rapid half rate of Pacific-Farallon spreading allowed the ridge to approach the continent at about 29 Ma. Extinct spreading ridges that occur offshore along 65% of the margin (Lonsdale, 1991)...
Heat capacities and thermodynamic properties of braunite (Mn7 SiO12) and rhodonite (MnSiO3)
R. A. Robie, J.S. Huebner, B. S. Hemingway
1995, American Mineralogist (80) 560-575
The heat capacities, C0P, of synthetic rhodonite and braunite have been measured by adiabatic calorimetry from 6 to ~350 K. The heat capacity of braunite was also measured to ~900 K by differential scanning calorimetry. Brunite exhibits a ??-peak in C0P in the temperature region 93.4-94.2 K. Rhodonite did not...
Effect of seasonally changing feeding habits on whole-animal mercury concentrations in Hydropsyche morosa (Trichoptera: Hydropsychidae)
C.D. Snyder, A.C. Hendricks
1995, Hydrobiologia (299) 115-123
Food habits, net-spinning activity, and whole-animal mercury concentrations in Hydropsyche morosa Hagan were examined monthly over a one year period on the South River, Virginia. Gut content analysis revealed seasonal patterns in the consumption of food that was correlated with net-spinning activity. Between April and October, when feeding...
Magnetically inferred basement structure in central Saudi Arabia
P.R. Johnson, I.C.F. Stewart
1995, Tectonophysics (245) 37-52
A compilation of magnetic data acquired during the past three decades for a region in central Saudi Arabia where Precambrian basement is partly exposed on the Arabian shield and partly concealed by overlying Phanerozoic strata, shows a central sector of conspicuous N-S-trending anomalies, a heterogeneous western sector of...
Transfer and accumulation of organochlorines from black-crowned night-heron eggs to chicks
T. W. Custer, Christine M. Custer
1995, Environmental Toxicology and Chemistry (14) 533-536
Eggs and sibling 1-, 3-, and 5-d-old chicks from seven black-crowned night-heron (Nycticorax nycticorax) broods were collected from Green Bay, Wisconsin, and analyzed for organochlorines. The concentration (μg/g) of nine organochlorines either decreased (n = 7) or remained the same (n = 2) as the chicks grew older. In contrast, the total...
Pulling the rug out from under California: Seismic images of the Mendocino Triple Junction region
Anne M. Trehu
1995, Eos, Transactions, American Geophysical Union (76) 369-381
The active tectonic regime of northwestern California changes abruptly from transform motion to subduction at the Mendocino Triple Junction. Northward migration of the triple junction has been a major factor in the tectonic history of the continental margin of California since the Oligocene and continues at present. Understanding the effects...
Rift flank segmentation, basin initiation and propagation: a neotectonic example from Lake Baikal
Susan M. Agar, Kim D. Klitgord
1995, Journal of the Geological Society 849-860
New surficial data (field, Landsat TM and topography) define morpho-tectonic domains and rift flank segmentation in the Ol'khon region of the Central Baikal rift. Deformation, drainage and depositional patterns indicate a change in the locus of active extension that may relate to a recent (<l Ma) change in the kinematics...
Nonperiodic eddy pulsations
David M. Rubin, Richard R. McDonald
1995, Water Resources Research (31) 1595-1605
Recirculating flow in lateral separation eddies is typically weaker than main stem flow and provides an effective environment for trapping sediment. Observations of recirculating flow and sedimentary structures demonstrate that eddies pulsate in size and in flow velocity even when main stem flow is steady. Time series measurements of flow...
Decadal and annual changes in biogenic opal and carbonate fluxes to the deep Sargasso Sea
W.G. Deuser, T.D. Jickells, Judith A. Commeau
1995, Deep Sea Research Part A, Oceanographic Research Papers (42) 1923-1932
Analyses of samples from a 14-year series of sediment-trap deployments in the deep Sargasso Sea reveal a significant trend in the ratio of the sinking fluxes of biogenic calcium carbonate and silica. Although there are pronounced seasonal cycles for both flux components, the overall opal/CaCO3 ratio changed by 50% from 1978...
Geological mapping of biological habitats on Georges Bank and Stellwaen Bank, Gulf of Maine region
Page C. Valentine, Eric A. Schmuck
1995, Conference Paper, Workshop proceedings: Applications of side-scan sonar and laser-line systems in fisheries research, Coast Bastion Inn, Nanaimo, British Columbia, Canada, January 20, 1994
No abstract available....
Jarosite-water oxygen and hydrogen isotope fractionations: preliminary experimental data
R. O. Rye, R.E. Stoffregen
1995, Economic Geology (90) 2336-2342
No abstract available....
Oxidation of dimethylselenide by δMnO2: oxidation product and factors affecting oxidation rate
Bronwen Wang, Richard G. Burau
1995, Environmental Science & Technology (29) 1504-1510
Volatile dimethylselenide (DMSe) was transformed to a nonvolatile Se compound in a ??-MnO2 suspension. The nonvolatile product was a single compound identified as dimethylselenoxide based on its mass spectra pattern. After 24 h, 100% of the DMSe added to a ??-MnO2 suspension was converted to nonpurgable Se as opposed to...
Reproduction in free-ranging Florida manatees (Trichechus manatus latirostris)
G. B. Rathbun, J.P. Reid, R. K. Bonde, J. A. Powell
1995, Information and Technology Report 1
No abstract available at this time...
Survival and population size estimation in raptor studies: A comparison of two methods
William R. Gould, Mark R. Fuller
1995, Journal of Raptor Research (29) 256-264
ABSTRACT.--The Jolly-Seber model is a capture-recapture model that can provide less-biased survival and population size estimates than those produced from simple counting procedures. Parameter estimation by simple counts and Jolly-Seber methods are based on certain assumptions that directly determine the validity of estimates. Evuluation of assumptions for parameter estimation is...
NBS continues cooperative studies of pintail ecology in California
J. Fleskes
1995, People, Land, and Water (2) 24-25
No abstract available at this time...
Insect damage to inflorescences of the threatened dune thistle, Cirsium pitcheri
Svata M. Louda, A. Kathryn McEachern
1995, Bulletin of the Ecological Society of America (76) 125-125
No abstract available....
Turtle, tortoise and terrapin: myriad monikers
J.E. Lovich
1995, People, Land, and Water (2) 26
No abstract available at this time...
Nonlethal procedures for detecting and monitoring furunculosis in salmon
R. C. Cipriano, L.A. Ford, J.D. Teska
1995, NBS Information Bulletin (40) 2
No abstract available at this time...
Large fires in wilderness areas
J. W. van Wagtendonk
1995, General Technical Report INT-GTR 320
No abstract available at this time...
Waterfowl diseases: Causes, prevention, and control
Milton Friend, D.H. Cross
1995, Report, Waterfowl Management Handbook
Preventing and controlling disease in waterfowl is a difficult job. Few tools are available to deal with disease in highly mobile, unconfined animal populations, and few managers are trained and experienced in the prevention and control of avian diseases. Furthermore, the geographic distribution, frequency of occurrence, magnitude of losses, and...
