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Raptor Predation On Pocket Gopher Populations By The Use Of Hunting Perches, Robert C. Christensen

Theses and Dissertations

The Northern Pocket Gopher (Thomomyst alpoides) is common on open range lands at high altitudes, and range management personnel have long been confronted with the problem of controlling gopher populations. Although some studies indicate that pocket gophers have little or no injurious effects on range in good condition, other studies show that large populations of these animals can seriously damage seeded ranges and ranges in poor condition (Colorado State University Exp, Stat., 1960). Julander, Low, and Morris (1969) indicate that in areas where gophers have reached populations of 27-39 gophers per acre, forage removal by gophers may be from 4.75 …

Characterization Of Field Populations Of Magarites Pupillus (Gould) (Gastropoda, Prosobranchia), Stephen Craig Schroeter

Theses and Dissertations

Field populations of Margarites pupillus (Gould), a numerically abundant prosobranch mollusc occuring on rocky shores in Puget Sound, Washington, have previously received little autecological attention. Seawater table studios and SCUBA observations led to the following conclusions: Populations of Margarites are primarily subtidal. Population density and growth are directly related to algal canopy density. Algal canopy may function in reducing predator efficiency, Margarites populations have a 1:1 sex-reatio and no size dimorphism. Sexually mature individuals live for at least two years, and possibly more than four years.

Helminths Of Sceloporus Lizards In The Great Basin And Upper Colorado Plateau Of Utah, Richard Carlyle Pearce

Theses and Dissertations

This study was prompted by the scarcity of information on helminths in Sceloporus lizards of Utah. It reports these worms and includes references to parasites of reptiles in the appendix. A microscopic examination of the coelom, mesenteries, liver, lungs, esophagus, stomach, and intestines of 55 lizards was made, but helminths were recovered only from stomachs and intestines. Examination of S. graciosus yielded Opchoristica scelopori, a cestode found in the duodenum, and Cyrtosomum penneri, C. readi, and C. heynemani, three nematodes of the cecum. The latter two are new nematodes for this host species. Examination of S. undulatus yielded three new …

The Effects Of Temperatures And Chemicals On The Oocysts Of Eimeria Stiedae, Charles Larry Keehner

Theses and Dissertations

A study was made of the effects of temperatures and chemicals on the unsporulated and sporulated oocysts of Eimeria stiedae. In general, oocysts were affected by temperatures lower than -10 C and above +39 C, while normal development occurred between these temperatures. Unsporulated oocysts were more tolerant to temperature extremes, as they survived up to 8 days at 39 C and 12 days at -28 C. Sporulated oocysts were killed after 24 hours storage at 39 C and 4 days at -28 C. Oocyst resistance to low temperatures was not improved if unsporulated and sporulated oocysts were conditioned before and …

Three New Species Of Petrified Wood From The Upper Jurassic Morrison Formation Of Southern Utah, David Arthur Medlyn

Theses and Dissertations

The petrified wood for this study was collected from the Upper Jurassic Morrison Formation in the south central part of Utah on the Colorado Plateau. The study area, located near Clay Point, Garfield County, Utah, is south of the Henry Mountains. The site is relatively undisturbed containing many well preserved specimens. This study constitutes the first detailed study of fossil coniferous woods of the Morrison Formation. Although this formation contains abundant petrified wood, its floral composition has been virtually unknown. Three genera have been identified in this study: Protopiceoxylon Gothan, Mesembrioxylon Seward, and Taxaceoxylon (Unger) Krausel. Protopiceoxylon has only been …

Self-Concept Change: The Effects Of A Self-Concept Enchancement Program On Preschool Children, E. Michelle Pardew

Theses and Dissertations

The purpose of this study was to investigate the effects of a self-concept enhancement program on the self-concepts of four-year-old children, and to discover significant aspects of their environment which are related to their self-concepts.

The population sample consisted of all four-year-olds (pretest=57» posttest*.52) attending Kiddie Kampus Preschool, Grand Forks Air Force Base, North Dakota. Both the experimental group (N=3^) receiving the self-concept enhancement program, and the control group (N=l8) not receiving the treatment program, were assessed during the pretesting and posttesting periods. The twenty-five variables assessed by The Thomas. Self-Concept Values Test (19 scales) and the Developmental Profile (6 …

Multiple Unit Correlates Of Discrimination Learning In Rats, Lynn C. Conrad

Theses and Dissertations

Multiple unit recording is a relatively new electrophysiological recording technique which records spike potentials from many neurons. In several laboratories, systematic changes have been observed during classical and instrumental conditioning but none under other conditioning procedures. The present study attempts to extend the method of multiple unit recording to discrimination learning using rats as experimental animals.

Five permanent electrodes were implanted in each of six rats. The sites implanted were the dorsal medial hypothalamus, the amygdaloid complex, the reticular formation, the medial geniculate, and the inferior colliculus. The animals were subjected to discrimination training which utilized tone as the auditory …

Caricaturization And Its Ability To Depict Ideology, Maurice D. Olson

Theses and Dissertations

One of the purposes of this thesis is to investigate the importance of the cartoon caricature styles that have been developed throughout history. Another purpose is to explain the development of my cartoon caricatures and their importance in depicting ideology. This thesis will also be concerned with the development of a caricature attitude, and caricature forms as depicted in an exhibition. The exhibit, submitted as a part of this written work, is an assorted collection of various cartoon images which can help in furthering an understanding of my personal attitude and interpretation.

Selected Songs Of Frederick Delius, Katherine Lucille Lee

Theses and Dissertations

Frederick Delius (1862-1934) began his career as a composer of songs and continued writing them at intervals throughout his life. Generally, he concentrated on one language at a time, setting Norwegian, French, Danish, German, and English poems. This study has shown that a relationship exists between the events of Delius’s life and his use of a particular language for his song text3.

The nine songs chosen to be analyzed are representative of the various language groups. Through analysis of form, harmonic relationships, cadences, key centers, accompaniment texture, melody, and mood the songs were divided into two general groups. Comparisons were …

Histological Changes In The Rat's Spleen Induced By Selected Anesthetic Agents, Donald R. Fowler

Theses and Dissertations

The purpose of this study was to determine what histological parameters of the rat's spleen were altered as a result of the anesthetic agent used. It also was desired to determine which anesthetic agent might be the most suitable to use in a transillumination study of the microcirculation of the living rat's spleen.

It was found that sodium Amytal administered intraperitoneally results in splenic dilatation. Chloral hydrate and sodium thiopental, given intraperitoneally, resulted in splenic contraction. Penthrane, ether, and chloroform administered by inhalation technique also resulted in splenic contraction. Penthrane and chloral hydrate while producing splenic contraction appear to do …

The Reproductive Biology Of The Leech Helobdella Stagnalis (Linnaeus) In Utah Lake, David L. Tillman

Theses and Dissertations

The reproductive biology of the brooding leech Helobdella stagnalis (Linnaeus) in Utah Lake was studied for an 18 month period from June 1970 to December 1971. In determining the annual reproductive cycle, the number of adult leeches carrying eggs or young were counted at weekly intervals during the reproductive season and monthly during the rest of the year. Gonadal staging data from histological sections were correlated with the field collection data. It was found that two broods of young were produced by the adult animals during the reproductive season. Continuous water temperatures were recorded at the study site throughout the …

Vegetation Changes Following Fire In The Pinyon-Juniper Type Of West Central Utah, Milo Arnel Barney

Theses and Dissertations

A total of 28 burn areas, that varied in age from 3-100+- years, were analyzed in a study of succession following fire, in the pin yon-juniper woodlands of west central Utah. Data were collected by means of the line-point and quadrat methods. These data were subjected to a multiple regression analysis. Canopy cover, basal area (sq. ft./acre) and density (trees/acre) of juniper were highly correlated with age of burn. Percentage dead sagebrush was found to be positively correlated with density of junipers. The stages of succession following fire began with weedy annuals, that reached a peak within 3-4 years. Juniper …

Fort Berthold Indian Reservation: A Land Use Study To 1971, Paul Felter

Theses and Dissertations

Can the land resources of a contemporary Indian reservation provide the basis for a self~sufficient community? To help answer that question, this study traces the agricultural development as well as other land use programs and problems of the Three Tribes of the Fort Berthold Indian Reservation in North Dakota.

The procedure involved a detailed study of the impact of Bureau of Indian Affairs-inspired agricultural projects, treaties and land cession agreements, land allotment programs, land fractionalization, and the building of the Garrison Dam. The results obtained show that the semi-agricultural Three Tribes passed from self-sufficiency before their reservation was established into …

The Nostalgic Revival In America, Dale A. Twingley

Theses and Dissertations

This paper is primarily concerned with the revival of nostalgia in America as seen by the minimal artist. The project reviews the current nostalgic trends in the media of theater, films, television, and radio, fashion, entertainment, business, and the arts. Attention is paid to the techniques by which this nostalgia is presented through the media of drawing and printmaking.

Because the artist's prints and drawings best illustrate the intentions of the artist, the majority of the paper is devoted to the study of them.

Art As An Encounter: A Personal View, Jeffrey V. Freeman

Theses and Dissertations

This thesis is an attempt to establish some insight into my personal aesthetic and creative philosophy as it relates to the metaphysical world I perceive. It will bring out points which I consider relevant and will give reference to the role that various past influences have had.

This thesis also will attempt to show examples of the chain of events in which my present work evolves from my past work. Since my viewpoints are constantly bombarded by new and various stimuli my endeavors continuously try to deal with those factors.

A Taxonomic Study Of The Western Collared Lizard (Crotaphytus Collaris), Nathan M. Smith

Theses and Dissertations

The marked pattern and coloration which distinguish members of Crotaphytus collaris baileyi in its western range indicated a need to compare it to the collaris-complex consisting of C.c. auriceps, C.c. baileyi, and C.c. fuscus. Thirty-two external and sixteen cranial characters were measured on preserved specimens. Blood serum proteins were compared by disc gel electrophoresis. Cluster, canonical, and discriminant analyses were used to define population characteristics and areas of intergradation. Disc electrophoresis did not reveal consistent population differences. The western range of C.c. baileyi is restricted to Central Arizona. The Great Basin form from western Arizona, western Utah, southern Idaho, southeastern …

The Bottom Fauna Of Fish Lake, Utah And Its Relationship To The Trout Fishery, Dennis L. Shirley

Theses and Dissertations

One-hundred and three bottom samples taken at Fish Lake, Utah from July, 1969 to June, 1970 were analyzed to determine the abundance, distribution, and standing crop of the bottom fauna species and to relate their availability to the amount of food eaten by the trout. Twenty-three taxa, representing three phyla and 19 families were collected. An amphipod, Gammarus limnaeus, in the littoral zone, and a tubificid worm, Rhyacodrilus coccineus, in the sublittoral and profundal zones, were the most abundant species. All 23 species were unevenly distributed in the littoral zone, whereas, only eight were found in the sublittoral and five …

Analysis Of Asexual Reproduction Dugesia Dorotocephala, Harvey Dee Mecham

Theses and Dissertations

Genetic control of decapitation-induced fission in planaria is mediated by stimulator and inhibitor molecules. Resolution of the two factors was accomplished by filtration chromatography of whole planaria extract. The stimulator (M.W. 2500 to 3500) was purified with ion exchange chromatography and increases the multiple fission rate. The inhibitor (M.W. 20,000 to 50,000) is non-dialyzable, heat labile and is inactivated unless kept frozen. Storage at 4°C results in a loss of inhibitory capacity with a concomitant stimulator increase, suggesting a protein-stimulator complex as the inhibitor. In light of a demonstrated animal intercommunication system, the inhibitor-stimulator complex is hypothesized as part of …

Nesting Of The White-Faced Ibis (Plegadis Chihi) Of Utah Lake, Kenichi David Kaneko

Theses and Dissertations

Information on the nesting of the White-faced Ibis (Plegadis chihi) in Utah County is presented for the first time. Nests built in hardstem bulrush (Sciprus acutus) settled from an average height of 120.8cm on June 9 to 93.6cm on June 27, 1971. Nest spacing ranged from 2m to 9m, averaging 4.6m. Invertebrates of the class Arachnida and the insect orders Coleoptera, Homoptera, Lepidoptera, and Thysanoptera were collected in a Berlese funnel. Average clutch size was 3.17. Egg length and width averaged 51.40mm X 36.75mm. Average volume was 36.93cc. In 21 study nests, 45.8 percent of the eggs hatched, beginning on …

Small Rodent Populations And Biomass In Three Sagebrush Communities Of Rush Valley, Utah, David W. Nichols

Theses and Dissertations

Three desert Artemisia tridentata communities in Rush Valley, Utah were trapped for small rodents during the summer of 1970 in a mark-recapture study. Population densities were estimated using several indices for each population category. Animals were weighed and rodent biomass calculated for each species throughout the summer. Populations, biomass, and other data were then analyzed to gain a better understanding of A. tridentata community types of the Great Basin. Peromyscus maniculatus, Eutamias minimus, and Reithrodontomys megalotis were common to area 1. Peromyscus maniculatus, E. minimus, and Perognathus parvus were common to areas 2 and 3. The peak estimated standing crops …

The Influence Of Succinate On Brain Gamma-Aminobutyric Acid Levels In Mice And The Resulting Tolerance To High-Pressure Oxygen., Roderick Lee Reinke

Theses and Dissertations

No abstract provided.

The Immunological Differences Of Nad-Linked L-Glycerol 3-Phosphate Dehydrogenase In Rabbit And Rat Tissues, Patrick C. C Choy

Theses and Dissertations

No abstract provided.

The Influence Of The Distar Language Program On The Verbal Functioning Of Delayed Language Preschoolers, Linda Turner

Theses and Dissertations

No abstract provided.

The Effect Of Enzymes On Extracellular Connective Tissues In The Developing Chick Aorta, Timothy L. Newman

Theses and Dissertations

No abstract provided.

The Relationship Between Tryptophan Metabolism And The Regulation Of Hepatic Gluconeogenesis In Diabetic Rats., Frederick Lucian Alvares

Theses and Dissertations

No abstract provided.

Functional Analysis Of Song In The Spotted Sandpiper, Actitis Macularia (L.), Merle L. Knudson

Theses and Dissertations

No abstract provided.

The Incidence Of Leptospirosis And Brucellosis In Mule And White-Tailed Deer And Bison In The Central And Upper Midwest, Clifford F. Mehrer

Theses and Dissertations

No abstract provided.

Behavior Of Rats Modified By Temperature And Helium-Oxygen Hyperbaria In A Simulated Dive, Deborah M. Allen

Theses and Dissertations

No abstract provided.

Physiology Of The Rat In Hyperbaric Environments Of Helium, Nitrogen And Nitrous-Oxide., Larry Charles Stetzner

Theses and Dissertations

No abstract provided.

Buffalo-Alyce. (Original Novel), L. Ray Wheeler

Theses and Dissertations

No abstract provided.