Extinction of montane populations of the northern leopard frog (Rana pippins) in Colorado
Paul Stephen Corn, James C. Fogleman
1984, Journal of Herpetology (18) 147-152
Between 1973 and 1982 nine populations of the northern leopard frog in the Red Feather Lakes region of Larimer County, Colorado, failed in reproduce. These failures all resulted in extinction of the populations. One area formerly supporting a population was recolonized in 1980, but no frogs were observed...
Evaluation of SPOT simulator data for geologic mapping in the Split Mountain region, Uintah County, Utah
G. Bryan Bailey, John L. Dwyer
1984, Book chapter, SPOT simulation applications handbook
No abstract available....
Ecology and conservation of North American tortoises (genus Gopherus): I. Population status and ecology of the desert tortoise (Gopherus agassize) in Sonora and Sinaloa, Mexico
T. H. Fritts, N.J. Scott Jr.
1984, Report
No abstract available....
Update on the use of remote sensing in oil and gas exploration
G. Bryan Bailey, John L. Dwyer, J. R. Francica, M. S. Feng
1984, Conference Paper, Unconventional methods in exploration for petroleum and natural gas
No abstract available....
Mineral-resources map of the Circum-Pacific region, northeast quadrant
Warren O. Addicott, Frank J. Sidlauskas Jr.
1984, Report
No abstract available....
Development and implementation of a digital geologic database for petroleum exploration in the Vernal quadrangle, Utah-Colorado, U.S.A.
John L. Dwyer, Eugene A. Fosnight, David A. Hastings, G. Bryan Bailey
1984, Conference Paper, Proceedings of the International Symposium on Remote Sensing of Environment, third thematic conference: Remote Sensing for Exploration Geology
No abstract available....
Geohydrology and hydrochemistry of aquifers in Cretaceous rocks, Minnesota
H. W. Anderson Jr., J. F. Ruhl
1984, Conference Paper, Geohydrology of the Dakota aquifer, C.V. Theis Conferences on Geohydrology
No abstract available....
Optimal timing in biological processes
Byron K. Williams, James D. Nichols
1984, American Naturalist (123) 1-19
A general approach for obtaining solutions to a class of biological optimization problems is provided. The general problem is one of determining the appropriate time to take some action, when the action can be taken only once during some finite time frame. The approach can also be extended...
Chance-corrected classification for use in discriminant analysis: Ecological applications
Kimberly Titus, James A. Mosher, Byron K. Williams
1984, American Midland Naturalist (111) 1-7
A method for evaluating the classification table from a discriminant analysis is described. The statistic, kappa, is useful to ecologists in that it removes the effects of chance. It is useful even with equal group sample sizes although the need for a chance-corrected measure of prediction becomes greater...
Organophosphate residues in grasshoppers from sprayed rangelands
K. L. Stromborg, L. C. McEwen, Thair Lamont
1984, Chemistry and Ecology (2) 39-45
Grasshoppers (Orthoptera) were collected in pastures that had been sprayed with malathion and acephate to estimate the secondary exposure of insectivorous birds to those pesticides. Residues of malathion were below 3 ppm at 30 and 54 hours after spraying and no malaoxon was detected. In contrast, acephate was found at...
Presence and biomagnification of organochlorine chemical residues in oxbow lakes of northeastern Louisiana
K. R. Niethammer, Donald H. White, Thomas S. Baskett, M. W. Sayre
1984, Archives of Environmental Contamination and Toxicology (13) 63-74
Ninety-eight samples of 16 species of animals were collected at Lake Providence, 88 samples of 15 species at Lake Bruin, and 21 samples of 5 species at Lake St. John, Louisiana, between 15 July and 25 September 1980. Residues of 13 organochlorine compounds were identified in these samples. Substantial concentrations...
Eggshell thickness and reproduction in American kestrels exposed to chronic dietary lead
Oliver H. Pattee
1984, Archives of Environmental Contamination and Toxicology (13) 29-34
American kestrels (Falco sparverius) were randomly paired and fed 0, 10, or 50 ppm metallic lead in their diet from November 1979–May 1980. Lead levels were elevated in bones and livers of birds receiving the treated diets, particularly the 50 ppm treatment group. Differential deposition of lead was noted between...
Evaluation of potential embryotoxicity and teratogenicity of 42 herbicides, insecticides, and petroleum contaminants to mallard eggs
David J. Hoffman, Peter H. Albers
1984, Archives of Environmental Contamination and Toxicology (13) 15-27
Results are reported for the embryotoxicity of 42 environmental contaminants applied externally to mallard (Anas platyrhynchos) eggs including crude and refined petroleum, and commercial formulations of herbicides and insecticides. Many of the petroleum pollutants were embryotoxic and moderately teratogenic and had LD50s of 0.3 to 5 μl per egg (∼6–90 μg/g...
Evolutionary divergence of giant tortoises in Galapagos
Thomas H. Fritts
1984, Biological Journal of the Linnean Society (21) 165-176
The giant tortoises in the Galapagos Archipelago diverge considerably in size, and in shape and other carapace characteristics. The saddleback morphotype is known only from insular faunas lacking large terrestrial predators (i.e. Galapagos and Mauritius) and in Galapagos is associated with xeric habitats where vertical feeding range and vertical reach...
Remote sensing and geophysical investigations of glacial buried valleys in northeastern Kansas
Jane E. Denne, Harold L. Yarger, P. A. Macfarlane, Ralph W. Knapp, Marios A. Sophocleous, James R. Lucas, Don W. Steeples
1984, Groundwater (22) 56-65
Aquifers found in glacial buried valleys are a major source of good-quality ground water in northeastern Kansas. The extent and character of many of these deposits are not precisely known, so a detailed study of the buried valleys was undertaken. Test drilling, Landsat imagery, shallow-earth temperature...
The use of decoys to attract Least Terns (Sterna antillarum) to abandoned colony sites in New Jersey
Natasha B. Kotliar, Joanna Burger
1984, Colonial Waterbirds (7) 134-138
The number of Least Tern colony sites in New Jersey has declined in recent years. Decoys were used at two recently abandoned Least Tern colony sites in New Jersey to encourage nesting. The sites were chosen because of their apparent suitability as colony sites and the relative ease...
Use of color and color infrared in coastal resource programs
James B. Johnston
1984, Conference Paper, Color aerial photography in the plant sciences and related fields : Proceedings of the Ninth Biennial Workshop on Color Aerial Photography in the Plant Sciences
No abstract available....
Maps & minds : mapping through the ages
Water Resources Division, U.S. Geological Survey
1984, Report
Throughout time, maps have expressed our understanding of our world. Human affairs have been influenced strongly by the quality of maps available to us at the major turning points in our history. "Maps & Minds" traces the ebb and flow of a few central ideas in the mainstream of mapping....
Techniques and applications of merging digital evaluation, geologic, and Thematic Mapper simulator data
Lawrence G. Batten, J. R. Francica
1984, Conference Paper, Remote sensing for exploration geology
No abstract available....
Late Miocene (Santa Margarita Sandstone) shallow marine clastics
R. Lawrence Phillips
1984, Report
The Santa Margarita Sandstone of late middle and early late Miocene age is located in the western Santa Cruz Mountains of central California. It represents a marine, tide-dominated, transgressive deposit which, during the early stage of the marine transgression formed a seaway connection between the Pacific Ocean and the interior...
Bibliography of water-resources reports for Arizona through 1982
Natalie D. White, Randall L. Fields
1984, Report
This bibliography is a listing of reports concerning the water resources of Arizona obtained by computer search of three bibliographic files: Water Resources Scientific Information Center (WRSIC); National Technical Information Service (NTIS); and GEOREF, from the American Geological Institute. The three files gave listings of several hundred reports, not all...
National planning considerations for the acquisition of strong ground-motion data
Roger D. Borcherdt
1984, Report
No abstract available....
Significant unconformities and the hiatuses represented by them in the Paleogene of the Atlantic and Gulf Coastal Province
Joseph E. Hazel Jr., Lucy E. Edwards, Laurel M. Bybell
1984, Book chapter, Interregional unconformities and hydrocarbon accumulation
A biostratigraphic, chronostratigraphic, and magnetostratigraphic model has been calibrated to produce a new time scale for the Paleogene. The model gives the biostratigraphic position and duration represented by significant unconformities in three areas of the Atlantic and Gulf Coastal Province: 1) western and central Alabama; 2) South Carolina; and 3)...
Dissolved cation concentrations in Okefenokee swamps surface water: Spatial and temporal variation
Gregor T. Auble
1984, Book chapter, The Okefenokee Swamp: Its natural history, geology, and geochemistry
No abstract available....
Cation exchange characteristics of Sphagnum from Okefenokee swamp
R. W. Bosserman, Gregor T. Auble, David B. Hamilton
1984, Book chapter, The Okefenokee Swamp: Its natural history, geology, and geochemistry
No abstract available....
