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Articles 21841 - 21870 of 22657
Full-Text Articles in Entire DC Network
Distribution Of Trace Metals In A Warm Water Release Impoundment, J. Nix
Distribution Of Trace Metals In A Warm Water Release Impoundment, J. Nix
Arkansas Water Resources Center Technical Reports
A water quality study of the DeGray Reservoir, Arkansas, was conducted beginning immediately following the beginning of impoundment through the first year in which the reservoir was operated near normal pool elevation. DeGray Reservoir is the first major dam in Arkansas to be equipped with upper level release capabilities. Temperature, dissolved oxygen, and turbidity were measured in situ at stations located over the old river channel. Samples were taken from selected levels within the water column at each station and analyzed for the following parameters: pH, sodium, potassium, calcium, magnesium, nitrate, phosphate, sulfate, chloride, fluoride, alkalinity, COD, iron, manganese, copper, …
Waste Disposal In The Waters Of The New York Bight: The Genesis Of A Dead Sea, Edward J. Linky
Waste Disposal In The Waters Of The New York Bight: The Genesis Of A Dead Sea, Edward J. Linky
Marine Affairs Theses and Major Papers
This paper is composed of four chapters. Chapter I will seek to delineate the scope of the paper and acquaint the reader with recent activity concerning pollution in the Bight. Chapter II will focus exclusively on scientific data gathered to date, about the effects of pollution on marine ecosystems. Chapter II will consider legal aspects of the problem, including relevant legislation, standing and other remedies which would be available to individuals or groups seeking to ultimately halt all ocean dumping in the area. Chapter IV will consist of conclusions to be drawn from this study.
Ua77/1 Western Alumnus, Vol. 43, No. 4, Wku Alumni Association
Ua77/1 Western Alumnus, Vol. 43, No. 4, Wku Alumni Association
WKU Administration Documents
WKU alumni magazine. Features the following articles:
- Conway, Sheila. Competency Based Teacher Education
- Scarborough, John. Enthusiasm & Planning, Powerful One-Two Punch for Education
- Burkeen, Emmett. Counselor Education, A Study in Development
- Stuart, Robert. The Stage is His Classroom - Bill Leonard
- Just, Paul. Remember When, 1955-56
- Conway, Sheila. Women's Athletics Return
- Armstrong, Don. Biology for Real - Tech Aqua Biological Station
- Goldwater, Barry. On the Energy Crisis
- Porter, William. Third World Realities
- Muskie, Edmund. Restoring Our Confidence
- Dickey, Debbie. The Big Red Western Band
- Given, Ed. Instant Alumni
- Topper Power Carries WKU to National Finals - Football
- Jimmy Feix, Coach …
The Effects Of Dwarf Mistletoe On The Wood Properties Of Lodgepole Pine, Douglas D. Piirto, Donald L. Crews, Harry E. Troxell
The Effects Of Dwarf Mistletoe On The Wood Properties Of Lodgepole Pine, Douglas D. Piirto, Donald L. Crews, Harry E. Troxell
Natural Resources Management and Environmental Sciences
The effects of dwarf mistletoe (Arceuthobium americanum Nutt. ex. Engelm.) on the wood properties of lodgepole pine (Pinus contorta Dougl.) were studied. The results indicate: a decline in modulus of elasticity, modulus of rupture, and work to proportional limit in both infected and noninfected wood from the infected trees; a higher specific gravity of the infected wood; a higher percentage of alcohol-benzene extractives in the infected wood; an increase in longitudinal shrinkage in both infected and noninfected wood from the same tree; a lower percentage of latewood in wood from infected trees; no significant difference in growth ring …
Water Current, Volume 6, No. 4, April 1974
Water Current, Volume 6, No. 4, April 1974
Water Current Newsletter
From the Desk of the Director
1974 Summer Institute
National Commission on Water Quality Announces Study Plans
Maximum Water Resources Development Urged
Department for Natural Resources Nixed in Favor of Short-Term Measures
Controversy Reigns Over Project Discount Rate
EDF Questions Flood Control Projects
Research Review: Practical Treatment of Feedlot Runoff
The Use Of Color Infrared Aerial Photography In Determining Salt Marsh Vegetation And Delimiting Man-Made Structures Of Lynnhaven Bay, Virginia, Robert E. Holman Lll
The Use Of Color Infrared Aerial Photography In Determining Salt Marsh Vegetation And Delimiting Man-Made Structures Of Lynnhaven Bay, Virginia, Robert E. Holman Lll
Biological Sciences Theses & Dissertations
Color infrared aerial photography was found to be superior to color aerial photography in an ecological study of Lynnhaven Bay, Virginia. The research was divided into three phases: 1) determination of the feasibility of correlating color infrared aerial photography with wetland species composition and zonation patterns, 2) determination of the accuracy of the aerial interpretation and problems related to the aerial method used, and 3) comparison of developed with undeveloped areas along Lynnhaven Bay's shoreline.
Wetland species composition and zonation patterns of major cones were correlated with aerial infrared photography and resulted in a high degree of accuracy. Problems with …
An Ecological Study Of The Craney Island Disposal Area In Hampton Roads, Virginia, David Wallace Laist
An Ecological Study Of The Craney Island Disposal Area In Hampton Roads, Virginia, David Wallace Laist
Biological Sciences Theses & Dissertations
A one year ecological study was conducted on the Craney Island Disposal Area in Hampton Roads, Virginia. This study attempted to identify the flora and fauna inhabiting the spoil deposits and trace the development of communities from the time of deposition through the initial stages of succession.
One hundred and ninety-two species were identified including 48 vascular plants, 66 insects, 48 birds, 18 species of algae, 4 crustaceans, and 8 vertebrates. The study area was divided into six zones based on substrate characteristics and species composition. The successional patterns and biotic interactions within each zone were discussed.
A Localized Epizootic Of Trichomoniasis In Mourning Doves, Ellis Greiner, William Baxter
A Localized Epizootic Of Trichomoniasis In Mourning Doves, Ellis Greiner, William Baxter
Nebraska Game and Parks Commission: Staff Research Publications
Trichomonas gallinae was present in 47% (57/121) of adult, 41% (7/17) of juvenile, and 29% (2/7) of nestling mourning doves (Zenaida nacroura) from Lincoln, Nebraska. Throat lesions were present in 5.9% (43/724) of the mourning doves trapped for banding. Two of four pigeons (Columba livia) possessed T. gallinae, but none contained throat lesions.
Studies On The Causes Of Tree Distribution In A Forest Type In The Dismal Swamp National Wildlife Refuge, Thomas A. Janszen
Studies On The Causes Of Tree Distribution In A Forest Type In The Dismal Swamp National Wildlife Refuge, Thomas A. Janszen
Biological Sciences Theses & Dissertations
Vegetational composition and environmental parameters were analyzed in a forest type of the Dismal Swamp. A 0.5 ha forest stand was divided into 200 5 x 5 meter contiguous quadrats and the tree size classes were precisely mapped. Fifty soil samples were analyzed for texture, pH, and major nutrients. A topographic map was constructed with precision to 0.01 ft. Analysis of variance tests showed non-randomness to exist in soil texture and nutrient content while homogeneity tests showed non-randomness in distribution of some woody species. Factor analysis indicated no significant correlations between soil quality, topography, and woody species. Findings indicate that …
Observations On The Distribution And Composition Of Zooplankton In Portions Of The Intracoastal Waterway, Virginia, O. Clair Hillard Jr.
Observations On The Distribution And Composition Of Zooplankton In Portions Of The Intracoastal Waterway, Virginia, O. Clair Hillard Jr.
Biological Sciences Theses & Dissertations
Five stations were established in the Southern Branch of the Elizabeth River, the Dismal Swamp Canal, the Albemarle and Chesapeake Canal and the North Landing River. Representative samples of zooplankton were taken from October 1971 to June 1972. A. total of 57 species were identified and discussions regarding seasonal distribution in relation to physical factors and circulation are presented.
The composition of the zooplankton was found to fluctuate greatly due to the variables characteristic of the study area. The combined effect of tidal flow with freshwater input in conjunction with drainage from the Great Dismal Swamp, results in isolated populations …
A Review Of Coyote Control Research, Donald S. Balser
A Review Of Coyote Control Research, Donald S. Balser
Vertebrate Pest Conference Proceedings: 6th (1974)
Research on coyote control has lagged behind operational control for several decades. With the current controversy over toxicants and control of coyotes, attention has suddenly been given to the research needs of the problem. In the past research on annual damage problems, particularly predators, was concentrated on coming up with new lethal methods. The picture has changed with a definite need to study the entire problem, including the measurement of losses, the ecology of predators and prey, their behavior, and means of solving loss problems by non-lethal methods or mechanical protection. In any lethal control research, selectivity must be emphasized. …
An Overview Of Astm's Activities In Establishing Standards For Vertebrate Pest Control Materials, John R. Beck
An Overview Of Astm's Activities In Establishing Standards For Vertebrate Pest Control Materials, John R. Beck
Vertebrate Pest Conference Proceedings: 6th (1974)
The new FEPCA legislation under which a l l of us now operate, changes the format and program of pesticide registration and use in the United States. One of the events immediately proceeding this law was the establishment of the United States Environmental Protection Agency, and the necessity for that new agency to develop guidelines and standards for the registration and use of pesticides. Early in 1973, a large number of persons associated with one or more areas of pesticides, and representing the academic world, consumers, and producing companies, assembled in Philadelphia to discuss with the American Society for Testing …
A Review Of Rodent Control Programs In New York State, Joe E. Brooks
A Review Of Rodent Control Programs In New York State, Joe E. Brooks
Vertebrate Pest Conference Proceedings: 6th (1974)
The history of rodent control programs in New York State is reviewed, beginning with state-funded efforts in August, 1967. In 1969, Federal rodent control grant funds were used to establish four Model Cities programs. At its peak in 1970, programs were active in 18 counties, eight cities and villages, and in six Model Cities areas. The program encompasses all the major metropolitan areas of the state, serving some nine million persons. As part of the state program, the Rodent Control Evaluation Laboratory was established to investigate chemosterilants as a means of rodent control and to develop knowledge of pest rodent …
Conference Participants
Vertebrate Pest Conference Proceedings: 6th (1974)
The Sixth Vertebrate Pest Conference drew a registered attendance of 236, with an estimated additional 50-75 persons who attended portions of the conference but d i d not register. As in past conferences, the attendance was made up of individuals having varying interests in vertebrate pest control problems from thirty-one states plus the District of Columbia. Participants from Argentina, Australia, Canada, Finland, Indonesia, Italy, Japan, Mexico, New Zealand, South Africa, Sudan and Switzerland contributed greatly to the success of the conference and provided further exchange of information on an international level.
Reptiles And AmphibiansA Management Dilemma, William D. Fitzwater
Reptiles And Amphibians&#;A Management Dilemma, William D. Fitzwater
Vertebrate Pest Conference Proceedings: 6th (1974)
Reptiles and amphibians despite general public revulsion have a more positive than negative potential. On the positive side are food, scientific and educational benefits, biological control of pests, medicine, ornamentation, carrion cleanup, pets and aesthetic values. On the negative side are predation, human confrontation and health. Where control is deemed a necessary management procedure, it can be achieved to some degree by cultural controls, repellents, trapping and reductional methods, such as, hand capture, den hunting, electric fence and pesticides (though none are currently registered for this purpose).
Frontmatter And Contents
Vertebrate Pest Conference Proceedings: 6th (1974)
Table of Contents
Use Of Chlorophacinone In The Struggle Against The Common Vole (Microtus Arvalis Pallas) And Against The Muskrat Ondatra Zibethica L.), J. Giban
Vertebrate Pest Conference Proceedings: 6th (1974)
The use of the anticoagulant rodenticide, chlorophacinone, was largely developed in France during the last ten years. Its special properties, with respect to those of other anticoagulants currently known, have contributed largely to finding an effective and economically acceptable solution in the struggle against the two most damaging rodents in France: the common vole (Microtus arvalis P. ) and the muskrat (Ondatra zibethica L. ).
The Potential Value Of Genetically Sterile Norway Rats In Regulating Wild Populations, Bryan P. Glass
The Potential Value Of Genetically Sterile Norway Rats In Regulating Wild Populations, Bryan P. Glass
Vertebrate Pest Conference Proceedings: 6th (1974)
I appreciate the invitation to address this assembly, and hasten to inform you that I come before you as a Director and representative of the Introgene Foundation of Oklahoma City, not as one who has been actively performing the research of which I shall speak, although I have been following it very closely for approximately five years. I am grateful to the Foundation for sending me to this Conference to present this paper. The biological control of animal populations took on a new dimension with the development of radiation-induced sterility in the screw-fly some two decades ago, and since that …
The Effects Of A Chemosterilant (Mestranol) On Population And Behavior In The Richardson's Ground Squirrel (Spermophilus Richardsonii) In Alberta, Louise A. Goulet, R. M. F. S. Sadleir
The Effects Of A Chemosterilant (Mestranol) On Population And Behavior In The Richardson's Ground Squirrel (Spermophilus Richardsonii) In Alberta, Louise A. Goulet, R. M. F. S. Sadleir
Vertebrate Pest Conference Proceedings: 6th (1974)
A chemosterilant, mestranol, was administered to three populations of Richardson's ground squirrel in southeastern Alberta. Mestranol was given to all squirrels in one plot, to only 50 percent in another plot, while a third plot remained as control. In all plots social behavior and population dynamics were followed over two seasons by live trapping and visual observations. Mestranol sterilized all females who received the drug shortly before or in early pregnancy; accordingly the birth rates were reduced. Levels of total aggression were also reduced but increased survival and immigration rates nullified the effects of the treatment during the first season. …
Dual Role Of Forbs And Rodenticides In The Ground Spray Control Of Pine Mice, Frank Horsfall Jr., R.E. Webb, Ross E. Byers
Dual Role Of Forbs And Rodenticides In The Ground Spray Control Of Pine Mice, Frank Horsfall Jr., R.E. Webb, Ross E. Byers
Vertebrate Pest Conference Proceedings: 6th (1974)
Highly effective controls for the pine mouse (Pitymys pinetorum) were obtained for three years in apple orchards by means of herbaceous ground cover sprays of [(chloro 4 phenyl) 1 phenyl] acetyl 2 dioxo 1-3 indane at a rate of 0.2 lb. per acre of actual orchard. This toxicant from Europe is designated there as chlorophacinone. The spray residue persists for a maximum of about 30 days and was not found to be translocated to fruits nor was it detected in runoff water. Ingestion of the lethal agent is markedly enhanced by an adequate presence of forbs in the treated greenery. …
Nesting Success Of Quelea Quelea With One Parent Removed And Observations On Roosting Behavior, With Implications For Control, Jeffrey A. Jackson
Nesting Success Of Quelea Quelea With One Parent Removed And Observations On Roosting Behavior, With Implications For Control, Jeffrey A. Jackson
Vertebrate Pest Conference Proceedings: 6th (1974)
Avicidal sprays are likely to continue to be a major tool in controlling Quelea quelea nesting colonies when they are found in cereal producing areas. New observations on nesting behavior indicate that a single parent cannot successfully care for the nest if the other parent is destroyed before the eggs have hatched. During the incubation period, Quelea return earlier in the evening and males are more concentrated in night roosting areas than after the eggs have hatched. These factors indicate that for the most efficient control, the best time to spray nesting colonies is before hatching begins.
Feral Pigeon Control, Lester B. Krebs
Feral Pigeon Control, Lester B. Krebs
Vertebrate Pest Conference Proceedings: 6th (1974)
Feral pigeons, problem birds common to most American cities and farms, are descendants of the Rock Dove (Columba livia) of North Africa and Europe. They were brought to America as domestic poultry by the first European settlers and have since escaped. They are not truly "wild", as their existence depends upon man's activities. An adult pigeon will eat about a pound of food a week, consisting primarily of grain spilled around elevators, rail road yards and feed lots or fed by bird lovers at city parks. Pigeons are usually monogamous. The female lays 1 to 2 eggs, 8 …
Oregon's Nutria Problem, Lee W. Kuhn, E. Paul Peloquin
Oregon's Nutria Problem, Lee W. Kuhn, E. Paul Peloquin
Vertebrate Pest Conference Proceedings: 6th (1974)
The nutria or coypu, Myocastor coypus, is a large semi-aquatic rodent that superficially resembles an overgrown muskrat or a stunted beaver. They were introduced into Oregon from about 1930 to the 1950s. At one time Oregon had more than 600 fur farmers raising these animals for fur; now there are none. Some animals escaped and many others were released into the wild when it became apparent that pelt values were nonexistent and production costs greatly exceeded profits. Being prolific and quite mobile the nutria quickly spread through much of western Oregon. By the 1960s damage to agricultural crops was …
Muskrat Control And Damage Prevention, James E. Miller
Muskrat Control And Damage Prevention, James E. Miller
Vertebrate Pest Conference Proceedings: 6th (1974)
Although the muskrat, Ondatra zibethica, is native throughout most of the United States and has been a mainstay of the fur business, in recent years it has become a serious pest causing extensive damage to some specific crops, as well as to earthen water-holding structures. Damage caused by muskrats to rice crops, food fish, and bait fish reservoirs in Arkansas was estimated in 1967 to be almost $900,000. A control program begun in October, 1967, directed principally at muskrat control, proved a significant aid in reducing damage. This program provided Arkansas farmers and landowners with practical, effective methods and …
The Significance Of Preference In Laboratory Bait Acceptance Studies, James G. Miller
The Significance Of Preference In Laboratory Bait Acceptance Studies, James G. Miller
Vertebrate Pest Conference Proceedings: 6th (1974)
The palatability of rodenticide baits has recently been the subject of renewed interest in industry and regulatory agencies. The requirement that a bait, especially those with anticoagulant rodenticides, be consumed by the target species is a fundamental requirement for effectiveness. This has been overlooked at times, with the result that in some instances, rodenticides have been relatively ineffective due to a lack of acceptance. The measurement of palatability and rodent acceptance is a controversial area. The procedures used have been subjected to criticism, often uninformed criticism, and the projection of the experimental data to use conditions has also been debated. …
Mestranol As A Repellent To Protect Douglas-Fir Seed From Deer Mice, Gerald D. Lindsey, Richard M. Anthony, James Evans
Mestranol As A Repellent To Protect Douglas-Fir Seed From Deer Mice, Gerald D. Lindsey, Richard M. Anthony, James Evans
Vertebrate Pest Conference Proceedings: 6th (1974)
Mestranol** [3-Methoxy-19-nor-l7α-pregna-l,3,5 (10)-trien-20-yn-l7-ol (C21H26O2)] was tested at 2 percent (active) as a repellent for protecting Douglas-fir (Pseudotsuga menziesii) seed from deer mice (Peromyscus maniculatus). In 5-day laboratory bioassays, deer mice consumed 61 to 66 percent fewer mestranol-treated seeds than control seeds; these results were about equal to those with a standard 0.5 percent (active) endrin seed treatment. Deer mice showed a progressive aversion to the mestranol seed treatment from 24 percent to 76 percent in 5 days. Thereafter, with minimal reinforcement, avoidance was maintained at 90 to 99 percent for …
Activities Of The Rodent Branch Of The European And Mediterranean Plant Protection Organization (Eppo), Arvo Myllymaki
Activities Of The Rodent Branch Of The European And Mediterranean Plant Protection Organization (Eppo), Arvo Myllymaki
Vertebrate Pest Conference Proceedings: 6th (1974)
The European and Mediterranean Plant Protection Organization (EPPO/OEPP) is a regional, governmental body, which has 33 member countries in Europe, North Africa, and Middle East. Its former activities were mainly concentrated on phytosanitary problems, but recently more attention has been paid on coordinating research activities and, especially, on problems associated with the use of pesticides in plant protection. On the Rodent Branch EPPO has at present three working units: 1. The Working Group on Field Rodents, concentrated primarily on biological aspects of the control of Microtines and other injurious rodents causing damage on field crops, horticulture, and forestry. 2. The …
Rodent Control Activities When Direct Seeding Forest Lands In Northern California, Peter C. Passof
Rodent Control Activities When Direct Seeding Forest Lands In Northern California, Peter C. Passof
Vertebrate Pest Conference Proceedings: 6th (1974)
The author reviews the changing use of rodenticides for deer mouse control over the past decade. He summarizes the operational procedures associated with direct seeding of forest lands by helicopter and the related practices of forest rodent control as they exist in the north coastal region of California. A description of the various field studies on Peromyscus baits and seed repellents presented to indicate the extent of local research activity in this increasingly important area of forest regeneration.
Laboratory Testing Of Albino Rats With Anticoagulant Rodenticides, Steve D. Palmateer
Laboratory Testing Of Albino Rats With Anticoagulant Rodenticides, Steve D. Palmateer
Vertebrate Pest Conference Proceedings: 6th (1974)
The results of testing dry anticoagulant baits at the Animal Biology Laboratory are evaluated in this paper. Overall, 14,940 rats were committed to these tests resulting in a mortality rate of 91 . 8 percent. The five chemicals tested and their mean mortality per test are: Diphacinone (93.5 percent), Pival (87.5 percent), Warfarin (93.9 percent), Prolin (91.2 percent), and Fumarin (92.8 percent). The data indicates that 77.4 percent of the tests conducted resulted in a mortality of 90 percent or greater, but only 11.9 percent of them resulted in acceptance of 33 percent or greater and mortality of 90 percent …
Alpha-Naphthylthiourea As A Conditioning Repellent For Protecting Conifer Seed, Peter C. Passof, Rex E. Marsh, Walter E. Howard
Alpha-Naphthylthiourea As A Conditioning Repellent For Protecting Conifer Seed, Peter C. Passof, Rex E. Marsh, Walter E. Howard
Vertebrate Pest Conference Proceedings: 6th (1974)
The object of this study was to find an alternative rodent repellent to take the place of endrin when direct seeding to regenerate coniferous forests. Compounds with aversive conditioning repellent attributes were screened. Even though still falling far short of endrin, which also acts as a lethal rodenticide, alpha-naphthylthiourea (ANTU) treated seed produced about twice as many seedlings as did the untreated seed. Both the laboratory and field evaluation procedures and results are discussed. It is hoped that with more research the efficacy of ANTU as a seed protectant can be further improved. The compound is much too promising to …