Nonparametric estimation of plant density by the distance method
S.A. Patil, K.P. Burnham, J.L. Kovner
1979, Biometrics (35) 597-604
A relation between the plant density and the probability density function of the nearest neighbor distance (squared) from a random point is established under fairly broad conditions. Based upon this relationship, a nonparametric estimator for the plant density is developed and presented in terms of order statistics. Consistency...
A microcomputer based system for current-meter data acquisition
R. T. Cheng, J. W. Gartner
1979, Conference Paper, Proceedings of Oceans
The U.S. Geological Survey is conducting current measurements as part of an interdisciplinary study of the San Francisco Bay estuarine system. The current meters used in the study record current speed, direction, temperature, and conductivity in digital codes on magnetic tape cartridges. Upon recovery of the current meters, the data...
Undersea topography and distribution of dolphins of the genus Delphinus in the Southern California Bight
Clifford A. Hui
1979, Journal of Mammalogy (60) 521-527
Aerial surveys totalling 21,902 km were analyzed in the Southern California Bight. Although the genus Delphinus is easily recognizable from aircraft, the different species are not detectable in these flights. Delphinus occur more frequently in areas of high relief than in areas of low relief. The depth of the water does not appear to...
Irrigation in Michigan, 1977
D.J. Bedell, Ron L. Van Til
1979, Report
No abstract available....
Oil and gas in offshore tracts: Estimates before and after drilling
M.F. Uman, W.R. James, H.R. Tomlinson
1979, Science (205) 489-491
Estimates of volumes of recoverable hydrocarbons underlying offshore tracts are made by the U.S. Geological Survey prior to the sale of leases and after drilling on those leases. Comparisons of these estimates show a moderate positive correlation and no evidence for relative bias, although the precision of the predictions is...
Risk preferences and flood insurance
Emil D. Attanasi, Michael R. Karlinger
1979, American Journal of Agricultural Economics (61) 490-495
A detailed theoretical model characterizing the individual's decision to purchase flood insurance is specified and the magnitude of the risk parameter is estimated using data based on transactions of flood insurance purchases. Empirical results for several samples of this subset of the general population indicated that consumers exhibited a relatively...
Comparison of the TRM of the Yellowstone Group and the DRM of some Pearlette ash beds
Richard L. Reynolds
1979, Journal of Geophysical Research B: Solid Earth (84) 4525-4532
Air fall ash beds (Pearlette) originating from rhyolitic eruptions in the Yellowstone‐Island Park region of Wyoming and Idaho are discontinuous but widespread throughout the western United States. Accumulation and deposition of ashes occurred in low‐energy fluvial and lacustrine environments. These ash beds have been correlated, according to their chemistry and...
Nature of firm expectations in petroleum exploration
Emil D. Attanasi
1979, Land Economics (55) 299-312
Recent interest in the state of the United States domestic petroleum industry has resulted in an increased concern regarding the ability of current large- scale econometric models to provide useful predictions about supply price sensitivity and about the effects of differing policy options on future supply. The petroleum industry's exploration...
Samarium-neodymium systematics in kimberlites and in the minerals of garnet lherzolite inclusions
A. R. Basu, M. Tatsumoto
1979, Science (205) 398-401
The initial ratios of neodymium-143 to neodymium-144 in kimberlites ranging in age between 90 × 106 to 1300 × 106 years from South Africa, India, and the United States are different from the corresponding ratios in the minerals of peridotite inclusions in the kimberlites but are identical to the...
Development of mitigation alternatives: a process
A.H. Farmer
1979, Book, The Mitigation Symposium: a National workshop on mitigating losses of fish and wildlife habitats
No abstract available....
The naming (and misnaming) of America
Mark Wexler
1979, National Wildlife
Jim Jam Ridge winds for several hundred feet a long a spectacular section of the High Sierra, near the heart of northern California's Mother Lode country. According to local historians, its name dates back to a night in the late 1800s when a drunk prospector rolled into a campfire, exploding...
Stratigraphy and depositional environments of Baltimore Canyon Trough
Claude (Wylie) Poag
1979, AAPG Bulletin (63) 1452-1466
The Baltimore Canyon Trough, lying offshore from the United States Middle Atlantic States, contains a thickness of at least 14 km of marine and nonmarine sedimentary rocks. One deep offshore stratigraphic test (COST B-2 well), several wells on the coastal plain, 18 shallow core holes (Deep Sea Drilling Project, Atlantic...
Comparison of coyote and wolf scat diameters
John L. Weaver, S. H. Fritts
1979, Journal of Wildlife Management (43) 786-788
Prairie dog distribution in areas inhabited by black-footed ferrets
C. N. Hillman, R. L. Linder, Robert Dahlgren
1979, American Midland Naturalist (102) 185-187
The distribution of black-tailed prairie dog (Cynomys ludovicianus) towns was delineated in a 1490 km2 study area in Mellette County, South Dakota, and was examined to determine the characteristics of black-looted ferret (Mustela nigripes) habitat. Between 1964 and 1974, black-looted ferrets were...
External determination of age of common snipe
T.J. Dwyer, J.V. Dobell
1979, Journal of Wildlife Management (43) 754-756
Relating residue in raccoon feces to food consumed
Raymond J. Greenwood
1979, American Midland Naturalist (102) 191-193
Feeding tests were conducted with captive raccoons (Procyon lotor) to permit more meaningful interpretation of food habit data obtained from fecal analysis. Ten diverse types of natural foods were offered in 20 tests. Digestibility coefficients were calculated that ranged from 3.6 for dry sunflowers, where considerable residue was recovered, to...
Habitat analysis methodology as applied to plains riparian habitats
Mel Schamberger, C. Short
1979, Book, Riparian and wetland habitats of the Great Plains: proceedings of the 31st Annual Meeting, Forestry Committee, Great Plains Agricultural Council
No abstract available....
Organochlorine residues in eggs of the endangered American crocodile (Crocodylus acutus)
R.J. Hall, T. E. Kaiser, W. B. Robertson, P.C. Patty
1979, Bulletin of Environmental Contamination and Toxicology (23) 87-90
Most of the 27 species and subspecies of surviving crocodilians have declining populations and 22 of them are considered to be severely endangered (IUCN 1971). The United States population of the American Crocodile is no exception; it probably numbers between I00 and 300 individuals (OGDEN 1976). Nests of the species...
Uptake of methoxychlor from food and water by the American toad (Bufo americanus)
R.J. Hall, D. Swineford
1979, Bulletin of Environmental Contamination and Toxicology (23) 335-337
Various studies (Mulla et al. 1963; Ferguson and Gilbert 1967; Cooke 1973) have examined the effects of pesticides on anuran amphibians, but the routes of contaminant uptake by transformed amphibians have not been evaluated. The need of frogs and toads to imbibe water from natural surface water would seem to...
Organochlorine poisoning of herons
Harry M. Ohlendorf, Douglas M. Swineford, Louis N. Locke
1979, Conference Paper, Proceedings of the 1979 conference of the Colonial Waterbird Group
Over a period of years interested individuals have submitted many dead or moribund herons of various species to our laboratory to learn whether the birds had been affected by diseases or organochlorine poisoning. Residue concentrations in carcasses of birds and mammals are considered the best measure of sublethal exposure,...
Relation of environmental factors to breeding status of royal and sandwich terns in South Carolina, USA
L. J. Blus, R. M. Prouty, B.S. Neely Jr.
1979, Biological Conservation (16) 301-320
The population ecology of the royal tern Sterna maxima and sandwich tern Sterna sandvicensis was investigated in South Carolina from 1970 through 1977. Royal and sandwich terns nested together in all of the colonies that we located.The peak in egg laying usually occurred in early May; peak hatching occurred from late May...
Carbon dioxide in the ocean surface: The homogeneous buffer factor
E.T. Sundquist, Niel Plummer, T.M.L. Wigley
1979, Science (204) 1203-1205
The amount of carbon dioxide that can be dissolved in surface seawater depends at least partially on the homogeneous buffer factor, which is a mathematical function of the chemical equilibrium conditions among the various dissolved inorganic species. Because these equilibria are well known, the homogeneous buffer factor...
Human related mortality of birds in the United States
R.C. Banks
1979, Special Scientific Report - Wildlife 215
Modern man serves as both a direct and an indirect cause of the death of birds. In the early 1970's, human activity was responsible for the death of approximately 196 million birds per year, or about 1.9% of the wild birds of the continental United States that died each...
Methods used at Patuxent Wildlife Research Center to study the effects of oil on birds
W.C. Eastin
Columbus H. Brown, editor(s)
1979, Conference Paper, Proceedings of the 1979 U.S. Fish and Wildlife Service Pollution Response Workshop
No abstract available....
Variation of rain chemistry during storms at two sites in northern California
V. C. Kennedy, Gary W. Zellweger, Ronald J. Avanzino
1979, Water Resources Research (15) 687-702
The chemical composition of rainfall at Menlo Park, on San Francisco Bay, is compared with rainfall at Petrolia, which is near the coast about 500 km north of San Francisco. Sequential samples representing 1.35 to 5.4 mm of rain were collected from November 1971 to January 1972. At rural Petrolia...
