Digital Commons Network^™

Control Of Clay Mineral Distribution By Estuarine Circulation, James River Estuary, Virginia, Jean-Pierre Feuillet

OES Theses and Dissertations

A study was performed on the clay minerals of the James River estuary, Virginia, to determine the predominant factors that influence clay mineral distribution in the estuary. The factors of differential settling, flocculation, and diagenesis show minor or no effects on distribution, while estuarine circulation exerts the strongest influence upon the clay mineral distribution.

There are two clay suites in the James River estuary. The upper James River clay suite is a kaolinite, dioctahedral vermiculite, and mixed-layer suite, with kaolinite being the major mineral. The lower Chesapeake Bay clay suite is an illite, chlorite, and montmorillonite suite, with illite being …

Water Current, Volume 8, No. 2, March/April 1976

Water Current Newsletter

From the Desk of the Director
NWRRI Research Seminar
Water Resources Activities - Agency Overview
AEEP Distinguished Foreign Lecturer
Water Research in Nebraska
Agreement Signed Between WRC and ERDA
Government's Water Pollution Program Questioned
Coal and the Powder River Basin: Five-State Groundwater Study Underway
Research Review

Laboratory And Field Investigations With Difenacoum, A Promising New Rodenticide, John O. Bull

Vertebrate Pest Conference Proceedings: 7th (1976)

Difenacoum is a new rodenticide recently introduced on the British market; it is one of the most potent of a series of hydroxycoumarin-based anticoagulants. Difenacoum is effective against laboratory rats and mice resistant to conventional anticoagulants and has a marked selectivity in favor of non-target species. Vitamin K₁ is an effective antidote and the hazard of secondary poisoning is minimal. Laboratory and field trials confirm difenacoum's efficacy against wild resistant strains. Further work is in progress to evaluate the efficacy of difenacoum against other rodent pest species.

Bird And Mammal Problems In Southeastern Pine Forests, T.E. Campbell

Vertebrate Pest Conference Proceedings: 7th (1976)

Birds and rodents eat pine seeds needed for regeneration, and the larger mammals destroy established seedlings by browsing or trampling. Some of the problems they cause have been solved or solutions are near; some still defy solution.

Bird And Mammal Problems In Southeastern Pine Forests, T.E. Campbell

Vertebrate Pest Conference Proceedings: 7th (1976)

Birds and rodents eat pine seeds needed for regeneration, and the larger mammals destroy established seedlings by browsing or trampling. Some of the problems they cause have been solved or solutions are near; some still defy solution.

Increasing Pocket Gopher Problems In Reforestation, John C. Capp

Vertebrate Pest Conference Proceedings: 7th (1976)

Concern over pocket gopher damage to conifer seedlings is increasing rapidly in the northwestern United States. The evolution of the pocket gopher (Thomomys spp.) has resulted in an animal that occurs throughout northwest forested areas and responds to site disturbances by increasing numbers and distribution. Pocket gophers kill or slow growth of conifer seedlings. More extensive logging, wildfires, and insect epidemics are resulting in more damage problem areas. This will continue. Current damage control is judged poor. Juvenile dispersal, high natural mortality rate, need for intensive treatment on entire damaged areas, current dependency on pesticides for control, increasing …

Pheromones In Small Rodents And Their Potential Use In Pest Control, Erik Christiansen

Vertebrate Pest Conference Proceedings: 7th (1976)

The paper reviews social interactions in small rodents in which pheromones have been reported to play a part. Some of the chemical messengers involved may have a potential use in control of rodent pests. Research in this field should be encouraged, because alternatives to the current control methods are highly desirable.

Methiocarb: Its Current Status As A Bird Repellent, Frederick T. Crase, Richard W. Dehaven

Vertebrate Pest Conference Proceedings: 7th (1976)

Studies by the U.S. Fish and Wildlife Service of the efficacy of methiocarb for reducing bird damage to sprouting corn, rice, soybeans, lettuce, and sugar beets, and to ripening rice, grain sorghum, wheat, cherries, grapes, and blueberries have shown it to be an effective, broad-spectrum bird repellent and crop protectant. The short-term plans of the Service for the further development and testing of methiocarb are reviewed. Also discussed is some of the rationale behind the use of chemical repellents to prevent agricultural damage by birds.

Management Of Pine Voles, David E. Davis

Vertebrate Pest Conference Proceedings: 7th (1976)

The pine vole (Microtus pinetorum) damages apple trees in western North Carolina, sometimes spectacularly. The current research monitors populations in orchards for several years to compare damage in different management practices. Recommendations for orchard management to reduce damage are devised and used to illustrate the process of application of basic knowledge. Populations of voles were monitored by 3 simple methods. Data on reproduction were obtained. Data on home range and mortality were found in the literature. In two counties, the orchards generally had grass in the alleys and sometimes a growth of weeds under the tree canopy. In …

Hazards To Wildlife Associated With Underground Strychnine Baiting For Pocket Gophers, Paul L. Hegdal, Thomas A. Gatz

Vertebrate Pest Conference Proceedings: 7th (1976)

Under an Environmental Protection Agency (EPA) contract, we evaluated the hazards associated with strychnine baiting for pocket gophers (Geomys bursarius) with the burrow-builder. On the Sherburne National Wildlife Refuge, Minnesota, we treated 662 ha (1638 acres) with 0.5 percent strychnine-treated bait. Treated fields were scattered throughout 10 sections. Control was effective--data from pocket gopher activity plots showed 87.5 ± 5.9 percent reductions in activity. Populations of other small rodents (while quite low) significantly declined on the treated area, but significantly increased on the control area. To measure secondary effects we equipped 36 raptors and 36 mammalian predators with …

Local Program Of Bird Damage Control In Salinas Valley, David R. Little

Vertebrate Pest Conference Proceedings: 7th (1976)

On behalf of the Monterey County Grape Growers Association, I wish to thank you for inviting us here and giving us a chance to tell the world, so to speak, about our local program of bird control: how we got there, where we are, and where we want to go. First, let me give you a little history of the grape industry in our county.

Pest Bird Damage Control In Cattle Feedlots: The Integrated Systems Approach, Thomas K. Palmer

Vertebrate Pest Conference Proceedings: 7th (1976)

The cattle feedlot affords an ideal habitat for large concentrations of birds. Several species are primarily involved in feed depredations and contamination. The development of an integrated systems approach to control involves the interaction of - human attitude, cultural control practices and application of bird damage control techniques, each of which is a dynamic system in itself.

Contamination Of Forest Ecosystems By Sodium Fluoroacetate (Compound 1080)*, J.A. Peters

Vertebrate Pest Conference Proceedings: 7th (1976)

Predictive and conceptual models are used to examine the contamination, toxicology, and residues of sodium fluoroacetate (Compound 1080) in relation to its application in vertebrate pest control programs on forest and pastoral lands.

As a pesticide, the toxin appears to be neither mobile nor persistent. Exceedingly slender opportunities exist therefore for significant contamination of susceptible components of the environment.

Operational Aspects Of Successful Ground Squirrel Control By Aerial Application Of Grain Bait, Conrad Schilling

Vertebrate Pest Conference Proceedings: 7th (1976)

By County Ordinance the County Agricultural Commissioner has been charged with rodent suppression in Fresno County, California. For nine years personnel from the Agricultural Commissioner's Office have conducted a county operated and funded program of ground squirrel suppression through the use of aerially applied zinc phosphide treated squirrel oat groats. Planning procedures, relative costs and operational aspects of the program are outlined. This technique of ground squirrel suppression has been shown to have many advantages over hand application of rodent baits. No known hazards to non-target wildlife species have been demonstrated.

Keynote Address—The Role Of Education In Vertebrate Pest Control, Gustav A. Swanson

Vertebrate Pest Conference Proceedings: 7th (1976)

Lack of adequate information is emphasized as a major problem in attaining effective control of damage by vertebrate pests, and it is stressed that the problem is widespread in all elements of the public, including those directly involved, like producers and government officials, as well as those only indirectly involved, like the average citizen. A number of specific examples are cited to illustrate the problems of uninformed or inadequately informed publics.

The Use Of Aircraft In Predator Control, Dale A. Wade

Vertebrate Pest Conference Proceedings: 7th (1976)

Private aerial hunting of predators for protection of livestock began before 1925 in the western United States. Apparently, it was first used in professional control programs in 1942. Inclement weather, dense vegetation and rough terrain are limiting factors and helicopters are more versatile than fixed-wing aircraft. When it can be employed, aerial hunting is unsurpassed as an immediate control method where livestock losses are severe and the need for control is urgent.

Control Methods For Nuisance Beaver In The Southeastern United States, Edward P. Hill

Vertebrate Pest Conference Proceedings: 7th (1976)

Strychnine alkaloid baits were consumed by both captive and wild beaver without any apparent hesitation. An approximate minimal acute lethal dose of sodium monofluoro-acetate to beaver of mixed ages and sex was 0.202 mg/kg. Trapping beaver on four study area watersheds in Alabama with No. 330 conibear traps for approximately two weeks in winter during two successive years essentially eliminated beaver. Older individuals were trapped the first year, maturing juveniles and the remaining few adults were trapped the second year, and there was very little reproduction between the trapping periods. Trapping, with its recreational appeal, and income and food potential …

System Analysis Perspectives, Thomas I. M. Ho

Department of Computer Science Technical Reports

No abstract provided.

A Class Of Functional Equations And Mielnik Probability Spaces, S. J. Guccione, Caslav V. Stanojevic

Mathematics and Statistics Faculty Research & Creative Works

Let S be the unit sphere of a normed real linear space N and let (S, p) be a Mielnik space of dimension two. For p(x, y) = f(‖x+y‖), x, yєS, where /is a continuous, strictly increasing function from [0, 2] onto [0, 1], it has been shown that (S, p) being two dimensional is equivalent to N being an inner product space. In some polarization problems modeled on the unit sphere of an inner product space, the transition probability p(x, y) may not be as well behaved as p(x, y) = f(‖x + y‖). In order to provide a …

On L¹ Convergence Of Certain Cosine Sums, John W. Garrett, Caslav V. Stanojevic

Mathematics and Statistics Faculty Research & Creative Works

It is shown that to a certain cosine series f, a Rees-Stanojević cosine sumn can be associated such that gn converges to f pointwise, and a necessary and sufficient condition for L1 convergence of gn to f is given. As a corollary to that result we have a generalization of the classical result of this kind. Other corollaries are given concerning the well-known integrability conditions. © 1975, American Mathematical Society.

Bear River Basin Type Iv Study: Economic Base Appendix Report, United States Department Of Agriculture

Elusive Documents

A collection of tables relating to the Bear River Basin Type IV Study relating the economic variables to be considered.

The Extremal Structure Of Locally Compact Convex Sets, J. C. Hankins, Roy M. Rakestraw

Mathematics and Statistics Faculty Research & Creative Works

Let X be a locally compact closed convex subset of a locally convex Hausdorff topological linear space E. Then every exposed point of X is strongly exposed. The definitions of denting (strongly extreme) ray and strongly exposed ray are given for convex subsets of E. If X does not contain a line, then every extreme ray is strongly extreme and every exposed ray is strongly exposed. An example is given to show that the hypothesis that X be locally compact is necessary in both cases. © 1976 Pacific Journal of Mathematics. All rights reserved.

An Evaluation Of The Effects Of Dredging Within The Arkansas River Navigation System, Volume Iv - The Effects Upon The Benthic Associations, Louise Russert Kraemer

Arkansas Water Resources Center Technical Reports

The huge and increasing volume of dredged materials being moved in and from the bottoms of waterways of the U.S. is probably well known to the reader. Lee and Plumb (1974) distinguish between the 2 forms of dredging: (1) mining the bottom sediments (as in shell dredging), and (2) developing and maintaining navigable waterways. They indicate some 380,000,000 cubic yards are dredged annually in this country; maintenance dredging accounting for about 80,000,000 cy, and new construction for about 300,000,000 cy.* These figures (based on 5 yr. averages) do not include dredging by private companies. Smith (1975) comments: "With federal dredging …

Programming Phase Of Water Response Ecosystem Model: I. Introduction And Support Programs, P. W. Lommen

Memorandum

No abstract provided.

Ua66/7/2 Newsletter, Wku Chemistry

WKU Administration Documents

Newsletter created by and about the WKU Chemistry department.

Programming Phase Of Water Response Ecosystem Model: I. Introduction And Support Programs, P. W. Lommen

Progress reports

No abstract provided.

Development Concept Plan For Bullfrog Basin: Glen Canyon National Recreation Area, Department Of Interior; National Park Service; United States

Elusive Documents

No abstract provided.

Simplified Rbe-Dose Calculations For Mixed Radiation Fields, Robert Katz, B. G. Fullerton Jr., R. A. Roth, S. C. Sharma

Robert Katz Publications

A problem for radiobiology, radiation protection and treatment planning is the calculation of RBE as a function of the delivered dose when this dose is a result of a mixture of low and high LET radiations, as for neutron and pion beams. Track structure theory (Katz and Sharma, 1975) has recently been used to produce an algorithm for calculating survival, RBE, and OER as a function of dose in such environments. This simple formulation is based on the concept of irradiation equivalence (Katz et al., 1972) through which the effect of a mixed radiation environment is calculated as if it …

Chebyshev Approximation By Reciprocals Of Polynomials On [0, ∞), D. Brink, G. D. Taylor

University Faculty Publications and Creative Works

No abstract provided.

A Revision Of The Genus Strategus (Coleoptera: Scarabaeidae), Brett C. Ratcliffe

Bulletin of the University of Nebraska State Museum (1924–2023)

The New World genus Strategus Kirby is here defined and revised for the first time. Eight species are described as new: S. atlanticus, S. caymani, S. craigi, S. hipposiderus, S. howdeni, S. longichomperus, S. symphenax, and S. tarquinius; 12 new junior synonyms are established (including the rejection of six previously valid species)'; one species is raised from synonymy; and two new replacement names are proposed. Strategus now contains one fossil species and 31 valid extant species. A key to the males and females of all the species is provided for the first …