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Articles 41311 - 41340 of 42630
Full-Text Articles in Entire DC Network
Water Resources News, Volume 5, No. 5, May 1973
Water Resources News, Volume 5, No. 5, May 1973
Water Current Newsletter
From the Desk of the Director
Deadline for Matching Grants Proposals
Institute Activities
Summer Institutes Announced at the University of Nebraska
Increasing Irrigation Efficiency
Black Hills Sciences Field Station
Construction or Destruction?
Low Flood Losses
Center for Environmental Studies
Earth Tremor Control Method
New Commission of Reclamation
Irrigation Considered Low Priority
Salinity Control Bill
Streams Rich in Mineral Content
Who Done It?
Drastic Mineral Depletions Noted
EPA Ordered to Release $6 Billion
Water Prospects in the West
Morphological And Ecological Relationships Of Etheostoma Caeruleum And Etheostoma Spectabile In West Central Indiana, Dennis E. Clark
Morphological And Ecological Relationships Of Etheostoma Caeruleum And Etheostoma Spectabile In West Central Indiana, Dennis E. Clark
All-Inclusive List of Electronic Theses and Dissertations
Etheostoma caeruleum Storer and Jii. spectabile (Agassiz) are closely related members of the family Percidae, subfamily Percinae, tribe Etheostomatinae. This group, consisting mostly of small, brilliantly colored darters, has been partially characterized by Collett ( 1963). Several papers have been published dealing with the biology of these two species. One or both species have been described by Storer (1845), Agassiz (1854), Reeves (1907, but see Trautman, 1930), Trautman (1930, 1957) Knapp (unpublished Ph.D. dissertation), Distler (1968), and others. Trautman (1930, 1957) Gerking (1945), and Hubbs and Lagler (1947) reported that h caeruleum lives in larger and faster streams, whereas JL_ …
Mechanisms Of Population Regulation In Confined Colonies Of Peromyscus Maniculatus (Wagner) And The Response To Exploitation, Donna Corn Olsen
Mechanisms Of Population Regulation In Confined Colonies Of Peromyscus Maniculatus (Wagner) And The Response To Exploitation, Donna Corn Olsen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Wild-trapped and laboratory-reared Peromyscus maniculatus (Wagner) were raised as confined colonies indoors with various stocking densities ranging from 0.026 to 0.100 mice per sq. ft. in pens of 40, 77, and 154 sq. ft. The animals were individually tagged and all pens were censused at weekly or semi-monthly intervals to record animals present, body weights, food consumption, and overt reproductive condition. At the termination of each experiment, all mice were necropsied and organ weights of gonads and adrenals recorded. Histological sections were made of the testes and ovaries. Half the colonies were subjected to density-independent exploitation by removal of 50% …
The Relationship Of Climatic Factors To Grazing Activities Of Cows On Winter And Spring Ranges, Benton M. Smith
The Relationship Of Climatic Factors To Grazing Activities Of Cows On Winter And Spring Ranges, Benton M. Smith
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The purpose of this research was to investigate the effects of climatic variations upon the daily activities of grazing cattle. The activities of individual cows on a partially seeded salt desert shrub range were observed and recorded during three grazing periods. Two of the periods were during consecutive winters and the other during the spring. Climatic variations during the second winter period were quantified and compared to changes in the daily activity patterns of the cattle.
Distinctly different daily routines of cattle activities were evident for the winter and spring seasons. In the spring, the cattle grazed, traveled, and drank …
Petrology And Regional Relationships Of The Ordovician Kinnikinic Formation And Equivalents, Central And Southern Idaho, William Calvin James
Petrology And Regional Relationships Of The Ordovician Kinnikinic Formation And Equivalents, Central And Southern Idaho, William Calvin James
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The Kinnikinic Formation of central Idaho is a sedimentary unit consisting principally of orthoquartzite. From its maximum measured thickness of 2285 feet in the central Lemhi Range near Gilmore, Idaho, it thins westward to 376 feet at the type section and southward to 326 feet near Arco, Idaho. Northeast of the Lemhi Range it occurs only as erosional remnants, due to pre-Devonian erosion. Both the lower and upper contacts of the Kinnikinic Formation are disconformable.
The Kinnikinic Formation is light colored, predominately fine to medium grained, thin to medium bedded, and largely cemented by silica overgrowths. Some metamorphic recrystallization has …
Reproduction In The Red Squirrel (Tamiasciurus Hudsonicus) In Colorado, Richard A. Dolbeer
Reproduction In The Red Squirrel (Tamiasciurus Hudsonicus) In Colorado, Richard A. Dolbeer
United States Department of Agriculture Wildlife Services: Staff Publications
Information on reproduction of the red squirrel (Tamiasciumrs hudsonicus) can be gleaned from studies in the northeastern United States (Klugh, 1927; Hamilton, 1939; Layne, 1954) and in western Canada (Miller, 1970; Smith, 1968; Kemp and Keith, 1971; Wood, 1967). However, there is a paucity of information on reproduction from the mountainous regions of the western United States. This paper presents reproductive information on the red squirrel from Colorado and helps fill this void. In addition, the reproductive strategy of red squirrels is briefly compared with that of snowshoe hares.
Trout Movements In A Small Mountain Stream, Thomas Mark Twedt
Trout Movements In A Small Mountain Stream, Thomas Mark Twedt
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Five groups of 400 hatchery rainbow trout, (Salmo gairdneri), were stocked in a small, mountain stream at 3-week intervals from June to September, 1972. A fish trap captured any fish moving out of a 500 m study section.
Fish began moving at high levels during the first day of each stocking and continued at high rates for 5-8 days (Early Phase), after which movement decreased to low levels for 6-9 days (Late Phase). Early Phase fish moved primarily at night, possibly due to their disoriented state and high subjectivity to stream conditions. Fish moving during Late Phase did …
The Foods And Feeding Habits Of Botulism Intoxicated And Healthy Waterbirds On The Bear River Refuge, Utah With Emphasis On The American Avocet And Blacknecked Stilt, George W. Wilson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Primary objectives of this study were: (1) to compare the food habits of healthy and botulism intoxicated American avocets and blacknecked stilts for qualitative and quantitative differences, (2) to determine which invertebrates found in the tracts of intoxicated and healthy birds contained type C toxin, and (3) to explain apparent susceptibilities among different sexes, ages and species of birds.
Based on percent utilization and occurrence of food items in the esophagus, the diets of healthy and intoxicated birds were similar. However, intoxicated avocets consumed higher proportions of Gastropoda and intoxicated stilts more Hydrophilidae larvae than did healthy birds. Because of …
Habitat Selection By Large Wild Ungulates And Some Aspects Of The Energy Flow In A Sub-Tropical African Savanna Woodland Ecosystem, Stanley M. Hirst
Habitat Selection By Large Wild Ungulates And Some Aspects Of The Energy Flow In A Sub-Tropical African Savanna Woodland Ecosystem, Stanley M. Hirst
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
A study of habitat selection by large wild ungulates was carried out on a 50 cm2 area in the sub-tropical Lowveld region of eastern Transvaal province, South Africa. Estimations were made of herbaceous forage net productivity and ungulate secondary productivity on the same area.
Fourteen vegetation types, varying in composition and structure from open savanna to dense woodland, were delineated by association analysis. Structural and vegetational characteristics which were considered to influence ungulate distribution were measured within each vegetation type.
The study area supported resident populations of seven ungulate species during the wet season; drv season densities were higher …
Effects Of Exercise On Serum Lactate Dehydrogenase Activity Of Catchable-Size Hatchery Rainbow Trout, Salmo Gairdneri, Gerlad T. Klar
Effects Of Exercise On Serum Lactate Dehydrogenase Activity Of Catchable-Size Hatchery Rainbow Trout, Salmo Gairdneri, Gerlad T. Klar
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Effects of exercise and the relative condition of exercised fish were viii evaluated for two strains of rainbow trout. Circular tanks fitted with a paddle were used to continuously exercise the fish and a stamina tunnel was used to evaluate the condition of exercised trout. Trout were exercised continuously at one fish-length per second and one-half fish length per second. Serum LDH activity in Shephard-of-the-Hills (Missouri) rainbow trout acclimated to 10 C increased two fold during the first four days of exercise. Serum LDH activity returned to control levels by the tenth day of exercise. Serum LDH activity in Shephard-of-the-Hills …
An Investigation Of Cluster Analysis, John C. Klingel
An Investigation Of Cluster Analysis, John C. Klingel
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Three cluster analysis programs were used to group the same 64 individuals, generated so as to represent eight populations of eight individuals each. Each individual had quantitative values for seven attributes. All eight populations shared a common attribute variance-covariance matrix.
The first program, from F. J. Rohlf's MINT package, implemented single linkage. Correlation was used as the basis for similarity. The results were not satisfactory, and the further use of correlation is in question.
The second program, MDISP, bases similarity on Euclidean distance. It was found to give excellent results, in that it clustered individuals into the exact populations from …
Abstracts Of Papers Presented At The 85th Session Of The Iowa Academy Of Science, April 27-28, 1973, Iowa Academy Of Science
Abstracts Of Papers Presented At The 85th Session Of The Iowa Academy Of Science, April 27-28, 1973, Iowa Academy Of Science
Iowa Academy of Science Documents
Presentation abstracts from the annual meeting of the Iowa Academy of Science
The Synthesis Of Pyrimidines And Condensed Pyridazines As Potential Antimetabolites, Judith A. Wagner
The Synthesis Of Pyrimidines And Condensed Pyridazines As Potential Antimetabolites, Judith A. Wagner
Chemistry and Chemical Biology ETDs
Interest in the compounds described by this thesis was first aroused in the early 1930's when a research team began to investigate the mass poisonings of the population in Indonesia. The cause of the poisonings seemed to be the foodstuffs which the people made for themselves from the abundant coconut. Two products in particular, Bongkrek and Semaji, made from coconut presscakes and grated coconut, were apparently the source of the toxic substance. When made under improper conditions, the toxic principle developed in an otherwise harmless food product. A compound was finally isolated and established as the toxic principle by …
A Study Of Trace Metal Concentrations In Two Species Of Mytilus Along The Pacific Coast Of The United States., George Harry Fullas
A Study Of Trace Metal Concentrations In Two Species Of Mytilus Along The Pacific Coast Of The United States., George Harry Fullas
Earth and Planetary Sciences ETDs
An investigation of iron, zinc, copper, and cadmium concentrations in Mytilus californianus and Mytilus edulis was conducted on specimens collected along the west coast of the United States. Animals and sea water were collected at six different areas and analyzed using an Atomic Absorption Spectrophotometer. Trace metal concentrations in the animals were influenced by the collection conditions of age, species, temperature, pollution, and metal relationships. Younger animals, of both species, contained higher concentrations of all the metals. Larger, or older animals, contained the smallest metal concentrations. Copper concentrations in the animals were higher in sea water with high copper content. …
Ua77/1 Western Alumnus, Vol. 42, No. 3, Wku Alumni Association
Ua77/1 Western Alumnus, Vol. 42, No. 3, Wku Alumni Association
WKU Administration Documents
WKU alumni magazine. Features the following articles:
- Corts, Paul. Western's Honors Program Forges Ahead
- Gray, David. Students Still Work Their Way
- Mefford, David & Roy Reynolds. Reaching Out for the Good Student
- Lawrence, Fred. Nick Rose All American
- Yeager, Randolph. A Westerner Remembers Harry Truman
- Scarborough, Clarice. Western Goes to Mexico
- Dillard, Gary & Rudolph Prins. Western at Tech Aqua
- Lawrence, Fred. Student Teaching - a la Guatemala
- Corts, Paul. Theatre Study Goes British
- Thompson, Kelly. The Most Unforgettable Person I Have Ever Known . . . Henry Cherry
- Commonwealth in a Capsule - Kentucky Building
- Adams, Ronald. Teacher Evaluation …
Water Resources News, Volume 5, No. 4, April 1973
Water Resources News, Volume 5, No. 4, April 1973
Water Current Newsletter
Nebraska and the National Water Commission Report
Summer Institutes Announced at the University of Nebraska
Interdisciplinary Water Resources Seminar
Advisory Committee Chairman Elected
Another Sewage Treatment Fund Delay!
Natural Resource Districts Called Landmark Legislation
Water Resources Council Director Resigns
Wetlands Preservation Policy
Congress Criticizes Bureau of Reclamation
West Virginia Dam Collapse Study
Drinking Water Standards
Expro '73
Combined Sewers Problem
EPA Issues New Application Form for Submission of Grant Programs
Symposium on Wastewater Effluent Limits
The Determination Of Thiamin And Its Derivatives In Brain Tissue Of Control, Thiamin-Deficient, Oxythiamin- And Pyrithiamin-Treated Rats, David S. Murdock
The Determination Of Thiamin And Its Derivatives In Brain Tissue Of Control, Thiamin-Deficient, Oxythiamin- And Pyrithiamin-Treated Rats, David S. Murdock
Theses and Dissertations
The determination of total thiamin, free thiamin, thiamin di phosphate (TDP) plus thiamin triphosphate (TTP), and total α- hydroxyethylthiamin (HET) levels in rat brain in control, deficient, oxythiamin- (OTH) and pyrithiamin- (PTH) treated rats was accomplished. It was found that the TDP + TTP/thiamin ratio observed in the thiamin-deficient, OTH- and PTH-treated rats was constant and did not differ from the ratio observed in the control rat brains. The brain levels of TDP + TTP decreased to 39% and 12% of the control thiamin levels in deficient and PTH-treated rats respectively. The brain HET and TDP + TTP levels of …
The Purification And Characterization Of Cytochrome B₅ From Porcine Kidney, M. Dean Klingler
The Purification And Characterization Of Cytochrome B₅ From Porcine Kidney, M. Dean Klingler
Theses and Dissertations
A soluble form of cytochrome b_5, with a 413/280 nm ratio of nearly unity, has been isolated and purified from porcine kidney using fractional precipitation, ion exchange resins, and gel filtration procedures. The cytochrome b_5 shows heat stability up to 50° and is stable in the pH range 6.0 to 8.5. The oxidized protein exhibits an absorption maximum at 413 nm, while the reduced form shows three peaks: 423, 526, 556 nm. Molecular weight determinations have given variable results, suggesting the possibility of a polymer composed of four and eight units of a 13,500 molecular weight protomer. This study has …
Thermodynamic Equilibrium Formation Constants And Molal Concentrations Of The Complexed Mercury-Containing Species Of Mercuric Chloride In Added Hydrochloric Acid And Methanol-Water Solvent Mixtures, Karl Jennings Walker
Thermodynamic Equilibrium Formation Constants And Molal Concentrations Of The Complexed Mercury-Containing Species Of Mercuric Chloride In Added Hydrochloric Acid And Methanol-Water Solvent Mixtures, Karl Jennings Walker
Theses and Dissertations
Saturated solutions of mercuric chloride in different methanol-water and hydrochloric acid solvent mixtures were equilibrated at 25.00 ± 0.01°C. Total mercury and free chloride concentrations were determined by analytical procedures and the data were analyzed with the aid of the computer. Tabulated below are the results of this study: [--see thesis for table--]
Sensitivity Of Vertebrate Embryos To Heavy Metals As A Criterion Of Water Quality, Wesley J. Birge, John J. Just
Sensitivity Of Vertebrate Embryos To Heavy Metals As A Criterion Of Water Quality, Wesley J. Birge, John J. Just
KWRRI Research Reports
Embryonic and/or larval stages of the leopard frog (Rana pipiens), domestic fowl (Gallus domesticus) and the goldfish (Carassiua auratus) were treated with cadmium chloride, mercuric chloride, lead chloride, zinc chloride and sodium arsenite. The principal objectives were (1) to determine the sensitivity of vertebrate embryos to certain metals which are of consequence in water pollution, and (2) to ascertain the suitalility of vertebrate embryos as bioassay organisms for monitoring metallic pollutants within water resources. Vertebrate embryos are found to be highly sensitive to the toxic effects of all the metals studied. Concentrations of mercury as low as 10 ppb, with …
Water Resources News, Volume 5, No. 3, March 1973
Water Resources News, Volume 5, No. 3, March 1973
Water Current Newsletter
From the Desk of the Director
Interdisciplinary Water Resource Seminar
Nitrogen In Nebraska's Environment
Cottonwood Watershed Gets Award
Water Conference at Nebraska Center
New Senior Specialist in Engineering and Public Works
New Officers for NWRA
Rain Bombs
Institute for Environmental Studies at Illinois
Water Pollution Study: Pushbutton?
Superport Sites for Oil Tankers
Report on Irrigation in Bulgaria Announced
World Climatic Data
Water Resources News, Volume 5, No. 2, February 1973
Water Resources News, Volume 5, No. 2, February 1973
Water Current Newsletter
From the Desk of the Director
Interdiscplinary Water Resources Seminar
Summer Institutes Announced at the University of Nebraska
Research Project Initiatied on White River Basin
NU Irrigation Short Course
Nitrogen in Nebraska's Environment
White House Aids Chosen
Reap and Water Bank Programs Abolished
New EPA Training Grant Rules
Water Funds Lawsuit
Water Agencies, Inc.
Proposed Drinking Water Standards
EPA Issues New Water Pollution Control Standards
Laser Beam Eradication
MIT Offers Professional Degree; Environmental Engineer
Environmental Quality Improving
GAO Urges Changes on 160-Acre Limit
What About Water?
Activities Of The Advisory Committee On Scientific And Natural Areas, Robert W. Burwell
Activities Of The Advisory Committee On Scientific And Natural Areas, Robert W. Burwell
Journal of the Minnesota Academy of Science
Significant actions taken by the Commissioner, Department of Natural Resources of the State of Minnesota, on recommendations of the Advisory Committee on Scientific and Natural Areas includes: issuance of policy statements and directives establishing criteria for defining and classifying scientific and natural areas; and rules and regulations applicable to such areas. Listed are the first four areas recommended for official designation. The status of an inventory of scientific and natural areas is summarized, and a description is given of the Advisory Committee procedure for processing recommendations for establishment of areas to be officially designated by the state.
Environmental Improvement: A Concept For Harbor Maintenance Programs For Long Island Sound, John-Robert Curtin
Environmental Improvement: A Concept For Harbor Maintenance Programs For Long Island Sound, John-Robert Curtin
Marine Affairs Theses and Major Papers
This paper suggests a comprehensive approach to maintenance dredging and maintenance dredge disposal for Connecticut in a carefully-regulated manner that will improve, rather than impair, the natural quality of the Sound. It proposes an interim measure that would allow for the continued operation of Connecticuts Commercial Harbor areas until a permanent program, together with the necessary technological advances, can be implemented to handle dredge disposal. This paper is based on data presently available on New Haven Harbor, presented in a report on the environmental quality of dredge spoils proposed to be removed from one area within New Haven Harbor known …
Annual Nutrient And Energy Intake Of The Desert Cottontail, Sylvilagus Auduboni, Under Natural Conditions, H G. Reynolds, F. J. Turkowski, R. M. Chew
Annual Nutrient And Energy Intake Of The Desert Cottontail, Sylvilagus Auduboni, Under Natural Conditions, H G. Reynolds, F. J. Turkowski, R. M. Chew
Memorandum
No abstract provided.
Animal Damage Control In South Dakota, V. Van Ballenberghe
Animal Damage Control In South Dakota, V. Van Ballenberghe
Great Plains Wildlife Damage Control Workshop Proceedings
South Dakota, like virtually all other states, is subject to economic losses from wildlife depredations. We have been in the government sponsored, animal damage control business perhaps longer than some states - our history dates back to the time of Three-toes and the Custer Wolf. In 1973 we are still in that business, perhaps more intensively than ever before, and we regard animal damage control as one of the most pervasive and difficult to solve wildlife problems facing us.
The Missouri River bisects South Dakota into approximately equal "East River" and "West River" land areas. These differ ecologically, and to …
Kansas Predator Damage Control Program, F. Robert Henderson
Kansas Predator Damage Control Program, F. Robert Henderson
Great Plains Wildlife Damage Control Workshop Proceedings
The Extension Division is the off-campus arm of Kansas State University~ a land grant university functioning through 105 county Extension offices involving over 265 county Extension workers that are backed up by some 175 state and area subject matter specialists. Kansas is an agricultural state. The production of livestock in Kansas is an important industry to our state and nation.
Our predator damage control program is an educational effort directed at the goal of reducing livestock losses where possible on individual farms and ranches, in Kansas. Our program has been in existence since 1954. A very important aspect of our …
Coyote Denning As A Method Of Damage Control, Walden C. Lemm
Coyote Denning As A Method Of Damage Control, Walden C. Lemm
Great Plains Wildlife Damage Control Workshop Proceedings
The coyote denning operation is a useful method in coyote control, both to control populations and to eliminate problem animals, but a thorough knowledge of coyote behavior prior to and during the denning season is essential for productive results.
Coyotes do not dig their own dens, but enlarge existing holes dug by other animals, often those dug by badgers. Coyote den holes are not difficult to distinguish from holes dug by smaller animals. Being long-legged animals, their den entrances are elongated vertically instead of being round like those of badgers and other short-legged animals.
Long Range Objectives Of The Federal Government In Coyote Management, James B. Ruch
Long Range Objectives Of The Federal Government In Coyote Management, James B. Ruch
Great Plains Wildlife Damage Control Workshop Proceedings
Introduction.
History.
Present Efforts to Change.
Research.
Interim Measures.
1973 Legislation.
State Actions Needed.
Conclusion.
An Assessment Of The Coyote Problem In The Great Plains States, Dale A. Wade
An Assessment Of The Coyote Problem In The Great Plains States, Dale A. Wade
Great Plains Wildlife Damage Control Workshop Proceedings
It has now been 21 months since President Nixon's Executive Order #11643 was issued and there has been a complete annual reproductive cycle in the coyote population of the western states without any major influence by chemical controls. The use of mechanical controls, including non-lethal methods, and greater emphasis on removing only specific offending animals has been advocated during this time as a solution where coyotes prey on domestic animals. With this brief look back, what have been the results?
We do not have absolute data on coyote numbers and livestock depredations resulting from this change in coyote management programs. …