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Page 3914, results 97826 - 97850

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Freshwater mussels: a neglected and declining aquatic resource
J.D. Williams, R. J. Neves
E.T. LaRoe, G.S. Farris, C.E. Puckett, P.D. Doran, M. J. Mac, editor(s)
1995, Book chapter, Our living resources: a report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems.
Abstract not supplied at this time...
Increased daylength stimulates plasma growth hormone and gill Na+, K+ and -ATPase Atlantic salmon (Salmo salar )
S. D. McCormick, Bjorn Thrandur Bjornsson, M. Sheridan, C. Eilertson, J. B. Carey, M. O'Dea
1995, Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology (165) 245-254
Atlantic salmon juveniles reared at constant temperature (9–10°C) were exposed to four photoperiod treatment and sampled every 2 weeks from January through May. Fish reared under normal photoperiod exhibited eight-and three fold increases in plasma growth hormone and gill Na+, K+-ATPase activity, respectively, between January and April. Fish exposed to...
Pattern of shoreline spawning by sockeye salmon in a glacially turbid lake: Evidence for subpopulation differentiation
C. V. Burger, J.E. Finn, L. Holland-Bartels
1995, Transactions of the American Fisheries Society (124) 1-15
Alaskan sockeye salmon Oncorhynchus nerka typically spawn in lake tributaries during summer (early run) and along clear‐water lake shorelines and outlet rivers during fall (late run). Production at the glacially turbid Tustumena Lake and its outlet, the Kasilof River (south‐central Alaska), was thought to be limited to a single...
Reproductive impairment in the Florida panther: Nature or nurture?
C.F. Facemire, T. S. Gross, L. J. Guillette
1995, Environmental Health Perspectives (103) 79-86
Many of the remaining members of the endangered Florida panther (Felis concolor coryi) population suffer from one or more of a variety of physiological, reproductive, endocrine, and immune system defects including congenital heart defects, abnormal sperm, low sperm density, cryptorchidism, thyroid dysfunction, and possible immunosuppression. Mercury contamination, determined to be...
Petrography, geochemistry, and depositional setting of the San Pedro and Santo Tomas coal zones: Anomalous algae-rich coals in the middle part of the Claiborne Group (Eocene) of Webb County, Texas
Peter D. Warwick, Robert W. Hook
1995, International Journal of Coal Geology (28) 303-342
Two coal zones, the San Pedro and the overlying Santo Tomas, are present for nearly 35 km in outcrop, surface and underground mines, and shallow drill holes along the strike of the middle part of the Claiborne Group (Eocene) in Webb County, Texas. A sandstone-dominated interval of 25 to 35...
Occurrence of active and inactive herbicide ingredients at selected sites in Iowa
W. Wang, M. Liszewski, R. Buchmiller, K. Cherryholmes
1995, Water, Air, & Soil Pollution (83) 21-35
The objective of this study was to investigate the occurrence of herbicide active and inactive ingredients (primarily volatile organic compounds) at four selected sites in Iowa representing drain tiles, observation wells, or lysimeters. Water samples were collected monthly and bi-monthly before and after herbicide applications in 1991, respectively. They...
Impact of flooding on the densities of selected aquatic insects
A.C. Hendricks, L.D. Willis, C. Snyder
1995, Hydrobiologia (299) 241-247
Data from a four-year study of five aquatic insect species,Hydropsyche betteni, H. morosa, H. bronta, Isonychia bicolor, andEphoron leucon, were utilized to evaluate the impact of a 60-year flood and a few lesser floods. The survey began in August, 1984 and was terminated in October, 1987...
Magnitude and frequency of 1993 flood volumes in Upper Mississippi River Basin
Rodney E. Southard
1995, Transportation Research Record 18-31
Previous maximum flows on many streams and rivers were exceeded during the flood of 1993 in the upper Mississippi River Basin. Not only were peak discharges exceeded at many streamflow-gaging stations, but also flood volumes were significantly higher than previous maximums. Rainfall amounts that were greater than 127 cm (50...
Pink topaz from the Thomas Range, Juab County, Utah
E.E. Foord, W. Chirnside, F.E. Lichte, Paul H. Briggs
1995, Mineralogical Record (26) 57-60
The Thomas Range is world-famous for its production of topaz Al2SiO4(F,OH)2, occurring in lithophysal cavities in rhyolite. Topaz Valley, at the southern end of the range, is perhaps the single most famous locality. While fine-quality, sherry-orange crystals to 5 cm or more in length occur at various localities, pale to...
Difference in the crab fauna of mangrove areas at a southwest Florida and a northeast Australia location: Implications for leaf litter processing
C.C. McIvor, T. J. Smith III
1995, Estuaries (18) 591-597
Existing paradigms suggest that mangrove leaf litter is processed primarily via the detrital pathway in forests in the Caribbean biogeographic realm whereas herbivorous crabs are relatively more important litter processors in the Indo-West Pacific. To test this hypothesis, we used pitfall traps to collect intertidal crabs to characterize the crab...
Proterozoic low-Ti iron-oxide deposits in New York and New Jersey: Relation to Fe-oxide (Cu-U-Au-rare earth element) deposits and tectonic implications
M. P. Foose, J. M. McLelland
1995, Geology (23) 665-668
Low-Ti iron-oxide deposits in exposed Grenville-age rocks of New York and New Jersey belong to a distinct class of iron-oxide (Cu-U-Au–rare earth element [REE]) deposits that includes similar iron deposits in southeastern Missouri and the Kiruna district of Sweden, the giant Olympic Dam...
Basement and cover-rock deformation during Laramide contraction in the northern Madison Range (Montana) and its influence on Cenozoic basin formation
Karl S. Kellogg, C. J. Schmidt, S. W. Young
1995, American Association of Petroleum Geologists Bulletin (79) 1117-1137
Two major Laramide fault systems converge in the northwestern Madison Range: the northwest-striking, southwest-vergent Spanish Peaks reverse fault and the north-striking, east-vergent Hilgard thrust system. Analysis of foliation attitudes in basement gneiss north and south of the Spanish Peaks fault indicates that the basement in thrusted blocks of the Hilgard...
Can Dugongs Survive in Palau?
H. Marsh, G. B. Rathbun, T. J. O'Shea, A.R. Preen
1995, Biological Conservation (72) 85-89
In August 1991 we surveyed dugongs Dugong dugon in the coastal waters of Palau using methods similar to aerial surveys conducted in 1977, 1978 and 1983. Twenty-six dugongs (including four calves) were seen, a count within the range obtained previously. The rate at which dugongs were seen per unit flight-time was lower...
Use of the euryhaline bivalve Potamocorbula amurensis as a biosentinel species to assess trace metal contamination in San Francisco Bay
C. L. Brown, S. N. Luoma
1995, Marine Ecology Progress Series (124) 129-142
Potamocorbula amurensis was assessed as a biosentinel species in San Francisco Bay, California, USA. Uptake of metal in both the laboratory and field showed that P. amurensis was sufficiently responsive to Ag, Cd, Cr, Ni and V to detect environmental differences in exposure. It was less suitable as an indicator of Cu...
Formation and regression of the corpus luteum of the American alligator
L. J. Guillette, A.R. Woodward, Q. You-Xiang, M.C. Cox, J.H. Matter, T. S. Gross
1995, Journal of Morphology (224) 97-110
Luteal morphology of the American alligator is unique when compared to other reptiles but is similar to that of its phylogenetic relatives, the birds. The theca is extensively hypertrophied, but the granulosa never fills the cavity formed following the ovulation of the ovum. The formation of the corpus luteum (CL)...
Survival rates of radio-collared female polar bears and their dependent young
Steven C. Amstrup, George M. Durner
1995, Canadian Journal of Zoology (73) 1312-1322
Polar bears are hunted throughout most of their range. In addition to hunting, polar bears of the Beaufort Sea region are exposed to mineral and hydrocarbon extraction and related human activities such as shipping, road building, and seismic testing. As human...
Can magma-injection and groundwater forces cause massive landslides on Hawaiian volcanoes?
R.M. Iverson
1995, Journal of Volcanology and Geothermal Research (66) 295-308
Landslides with volumes exceeding 1000 km3 have occurred on the flanks of Hawaiian volcanoes. Because the flanks typically slope seaward no more than 12 °, the mechanics of slope failure are problematic. Limit-equilibrium analyses of wedge-shaped slices of the volcano flanks show that magma injection at prospective headscarps might trigger the...
Differing Eocene floral histories in southeastern North America and Western Europe: Influence of paleogeography
N. O. Frederiksen
1995, Historical Biology (10) 13-23
Pollen data show that in southeastern North America, the Eocene angiosperm flora attained its maximum relative diversity some 8 m.y. after the late early Eocene to earliest middle Eocene climatic maximum. Increasing diversity resulted in part from the flora's position on a large continent which allowed easy migration. In western...