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The Site Of Absorption Of Xanthophylls And Factors Affecting Pigmentation Of Chickens, Egg Yolks, And Products Made From Egg Yolks, Lloyd Henry Littlefield

Doctoral Dissertations

A total of four experiments were conducted to determine the location of the site of absorption of xanthophylls, to determine the relationship of egg yolk color produced by various feed xanthophylls to the color of mayonnaise, and to study the effect of the level of dietary cow manure, age, ambient temperature and feed consumption of xanthophyll pigmentation of hens and egg yolks.

Increases in the level of blood xanthophylls and visual pigmentation of xanthophyll depleted hens were used to measure the absorption of xanthophylls. Surgical removal of either the duodenum, jejunum, ileum or large intestine resulted in a slight but …

A Taxonomic Comparison To Uta Stansburiana Of The Great Basin And The Upper Colorado River Basin In Utah, Lloyd C. Pack

Theses and Dissertations

The lack of a comparative study between the Uta stansburiana of the Great Basin and Upper Colorado River Basin, and the fact that several reptile species have developed distinct populations in the Upper Colorado River Basin prompted this study. Twenty-one external characteristics of these lizards were compared, including several which had not been previously used in the separation of Uta stansburiana into subspecies. All of the statistical data were obtained from preserved specimens. Twelve of the twenty-one characteristics show significant differences between the Great Basin and Upper Colorado River Basin populations. The characteristics of back pattern and throat color show …

The In Utero Development Of Mouse Embryos After Cultivation In Vitro From Two-Cell To Blastocyst In 17b - Estradiol Treated Medium, Harley J. Schneider Jr.

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead state University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Harley J. Schneider, Jr. on August 27, 1970.

The Effect Of The Parasite Hymenolepis Diminuta On Iodine Economy In The Rat, David Gourdon Holmes

Theses and Dissertations

A balance of iodine within the rats is important for the maintenance of normal thyroid function. Because of Hymenolepis d[imi]nuta's affinity for certain nutrients, it may upset norma[l] iodine balance in the rat. To determine this, tapeworm-infected and non-infected rats were given 125Iodide orally and the percent uptake of iodide by the thyroid and the amount of radioac[tiv]ity in the tapeworms was determined. The percent distribution of the radio-iodinated compounds in the thyroid, tapeworms and feces was also determined. These procedures were repeated except 125Thyroxine was administered orally. There was a decrease in percent iod[id]e uptake by thyroids of tapeworm-infected …

Asexual Reproduction In Planaria Characteristics Of The Inhibitor(S), Linda Gail Sheffield

Theses and Dissertations

A study was made of the postulated fission-inhibiting substance located in the cephalic region of Dugesia dorotocephala. Rearing decapitated planaria in four different concentrations (25, 50, 75 or 100 ug/ml) of head or whole body extract resulted in a positive correlation between the inhibition of fission rate and the concentration of extract. The difference in inhibitory activity between the two types of extracts was three percent at maximum. The inhibitory substance was partially inactivated at 60° C. There was a direct correlation between the length of time that the extract was heated and the inactivation of inhibitor. The active substance …

The Breeding Biology Of The Mountain Chickadee (Parus Gambeli), Donald Frederick Martin

All Master's Theses

The breeding biology of the Mountain Chickadee (Parus gambeli) was studied in 1968, 1969, 1970 in the Robinson Canyon, 13 miles west of Ellensburg, Kittitas County, Washington.

The Use Of Varying Levels Of Urea In Concentrates Fed To Dairy Cattle, John Roland Plummer

Doctoral Dissertations

Five experiments were conducted to investigate the use of concentrates that contained varying levels of urea for dairy cattle fed corn silage as the only forage.

Three experiments were conducted using 84 Holstein cows. Twenty-seven cows were used in Experiment I to compare a concentrate supplemented with soybean meal with a concentrate in which 2 percent urea (by weight) replaced a portion of the soybean meal on an equal nitrogen basis. Effects of frequency of feeding of concentrates containing urea were also studied. Results indicated that ration intake, body weight changes, milk production, milk protein, and milk SNF were not …

The Effects Of Herbicide Applications On The Animal Populations Of Aspen Communities, Carl Eugene Wadsworth

Theses and Dissertations

Approximately 475 acres of aspen, oak brush, and grass-forb-shrub communities were treated with herbicides. The populations of arthropods, birds, and mammals were investigated on treated and untreated areas and the results were compared. There was no difference between soil arthropod populations on treated and untreated aspen plots but a significant increase in these populations on treated meadow plots. The foliage insect populations were significantly lower on the treated aspen plots but were significantly higher on the treated meadow plots. The aquatic invertebrates were not affected by the treatments. Bird populations ware lower in the treated area during the nesting season …

A Study Of The Electrophoretic Patterns Of Blood Serum Proteins From Two Populations Of Mountain Whitefish (Prosopium Williamsoni), Fred Richard Hansen

Theses and Dissertations

Electrophoretic patterns on polyacrylamide gels of blood serum proteins from 74 mountain whitefish (Prosopium williamsoni Girard) were examined for differences as they pertained to two geographically isolated populations, age, and sex. Serum samples were acquired from two supposedly isolated populations, the lower Provo River and the lower Weber River. Comparisons among gels were made on the basis of protein distribution as indicated by number of fractions and their density. Serum proteins showed marked intraspecific differences between the males as well as the females of each population. No variations were found which could be attributed to degree of maturity. Definite pattern …

Breeding Biology Of The Sage Thrasher, John Wayne Gooding

All Master's Theses

The sage thrasher, Oreoscontes montanus (Townsend), is a common bird that breeds throughout the sage brush areas of the Great Basin and from northern Arizona to southern Saskatchewan. Although it is a fairly common and conspicuous bird, almost nothing about its life history has been published. This study was conducted in central Washington during the spring and summer of 1969 and the spring and early summer of 1970. During the 1969 season, emphasis was placed on finding and tracing the phenologies of as many nests as possible in order to determine the timing of the nesting cycle. During the 1970 …

A Comparative Study Of The Head And Thoracic Osteology And Myology Of The Skinks, Eumeces Gilberti Van Denburgh And Eumeces Skiltonianus (Baird And Girard), David F. Nash

Theses and Dissertations

Further clarification of the taxonomic and phylogenetic relationships of Eumeces gilberti and Eumeces skiltonianus is achieved by the comparisons of the skull, mandible elements, and the anterior myology of these two species. Figures are provided to compliment the descriptions. The study confirms their close relationship and few differences are observed. E. skiltonianus, however, appears to have more anatomical plasticity which suggests that E. gilberti may have arisen from the former.

A Survey Of The Helminth Parasites And Coccidia Of Cattle And Sheep In Utah Valley, Joseph Carl Fox

Theses and Dissertations

A survey of gastro-intestinal parasites in cattle and sheep in Utah Valley was conducted. Cattle in the valley were not seriously parasitized by helminths, whereas sheep usually had heavy helminth infections. Ten genera of helminths and 8 species of coccidia were identified in cattle in the valley, and 14 genera of helminths and 8 species of coccidia were identified in sheep. In conjunction with the survey, meteorologic studies were conducted May through September, 1909, to ascertain the effects which irrigation had upon micro-environments on grass pastures in relation to the development of free-Iiving stages of gastro-intestinal nematodes of ruminants. The …

Natural Sovereignty On The High Seas, Thomas Arthur Marnane

Theses and Major Papers

The purpose of this paper is to examine a current dispute involving resources in the sea, determine the issues involved, and hypothesize a solution. Specifically, the dispute chosen involves Latin American claims to extensive sovereign fishery rights in adjacent coastal waters and objections to these claims. The United States and the parties to a declaration made in Santiago, Chile, in 1882, Chile, Ecuador, and Peru, have been chosen as most representative of the opposing positions. The International Court of Justice, primarily utilizing as a framework for analysis the dicta, findings, and opinions in their February 1969 Judgment in the North …

Hereford And Holstein Steer Performance On High Grain Diets With And Without Corn Silage, Cyril Bruce Russell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A factorially designed experiment had 18 Hereford and 18 Holstein steers on individually fed, high-grain diets. One diet included 59% rolled barley, 30% CSF beet pulp, 5% protein, vitamin, mineral, and stilbestrol supplement, and 6% chopped hay and straw. The other diet had corn silage (11% air dry matter equivalent) substituted for the chopped roughage and 5% of the beet pulp. The Holsteins were heavier at the start, 752 lb. as compared to the Herefords 686 lb. average. The weight differential was maintained throughout the approximately 180-day trial. The Holstein's feed consumption and rate of gain, 23.4 and 2.71 lb. …

Growth Of Eimeria Alabamensis From Cattle In Vitro And The Changes In Fine Structure Associated With Schizogony, J. Robert Sampson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Monolayer primary cultures of cells from bovine embryonic intestine (BEint), kidney (BEK), spleen (BES), and thyroid (BET) and cell line cultures of embryonic bovine trachea ( EBTr) and synovium (BESy)as well as established cell line cultures of Madin-Darby bovine kidney (MDBK), human intestine (Int 407), and Syrian hamster kidney (BHK-21) were inoculated with freshly excysted sporozoites of Eimeria alabamensis and observed for 4 days. Sporozoites penetrated all cell types during the first 24 hours in culture. Numerous intracellular sporozoites, trophozoites, and binucleate schizonts were seen in all cell cultures except Int 407. The best development occurred in BES and MDBK …

An Economic Analysis Of Contour Furrows And Gully Checks On The Frail Lands Of Southeastern Utah, Karl A. Simonson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The upper Colorado River drainage system yields approximately 104,000 acre-feet of silt annually to the Colorado River. In an attempt to reduce the silt load, federal land management agencies have installed numerous land surface treatments. A study was conducted to measure the economic benefits of the land treatments near Cisco, Utah, and to compare them to the treatment costs and to develop predictive criteria for estimating the optimum intensity of treatment.

The economic evaluation was done in a benefit-cost framework and the criteria for estimating optimum intensity of treatment was done in a production-function framework.

The land treatments were found …

The Effects Of Formaldehyde On The Frequency Of Reversion Of The White-Ivory Mutant Of Drosophila Melanogaster, Ruth Ellen D. Wood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study is an analysis of the effects of formaldehyde, a chemical which is both recombinogenic and mutagenic, on white-ivory (wⁱ) a highly mutable allele of the white locus of Drosophila. Formaldehyde is shown to significantly increase the reversion frequency of wⁱ. The results of this investigation differ from earlier observations in three respects: (1) there is a positive correlation between RNA (ribonucleic acid) concentration and reversion frequency in the presence of formaldehyde, but reversion does not appear to be totally RNA dependent; (2) female germ cells are more sensitive than those of the male; …

Effects Of Starvation And Time At Stocking On Survival Of Stocked Rainbow Trout, Salmo Gairdneri, Marlin John Bricker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Investigations of effects of starvation and time at stocking on the survival of catchable rainbow trout in two areas of Mammoth Creek in Dixie National Forest, Utah, were conducted from May 24 to December 6, 1969. Fish were starved for 6 days and 1 day and stocked in the morning (5:40-7:00 a.m.) and in the afternoon (1:45-5:30 p.m.). Out of 7,000 tagged fish stocked, 4,751 tags were returned by fishermen. The 6-day starved fish, stocked in the morning returned to the creel in highest numbers (1,240); followed by 1-day starved, afternoon-stocked fish (1,194); 6-day starved, afternoon-stocked fish (1,163); and 1-day …

On The Population Ecology Of Uinta Ground Squirrels, Spencer R. Amend

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A marked population of Spermophilus armatus averaging 529 individuals per year was studied for two and a half seasons on a 22-acre tract in northern Utah. The average date of emergence from hibernation of the first squirrel was 9 April. Mating occurred as soon as animals emerged from hibernation. The average date of appearance of the first litter was 31 May. Emergence sizes of litters were from 5.2 for yearling females to 6.3 for adult females. Few instances of predation were observed. Age and sex ratios varied throughout the season and for different portions of the study area. The population …

The Development Of The Endogenous Stages Of Eimeria Ninakohlyakimovae (Yakimoff And Rastegaieff, 1930) In Domestic Sheep, Richard S. Wacha

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Forty-five mixed breed lambs, 1 to 4 months of age, were used to study the patent period and endogenous stages in the life cycle of Eimeria ninakohlyakimovae. The lambs were inoculated with oocysts of this species and killed at daily intervals from 1 through 14 days after inoculation. From all lambs of the study sections of intestinal tissue were prepared by routine methods for histological examination.

E. ninakohlyakimovaewas observed to have 2 generations of schizonts in its endogenous development. Mature, first-generation schizonts had an average diameter of about 290 μ and had many thousands of merozoites, averaging 11.9 …

Changes With Growth In Selected Body Proportions Of The Woundfin Minnow (Plagopterus Argentissimus Cope: Cyprinidae), Edward James Peters

Theses and Dissertations

In this study 883 specimens of the woundfin minnow (Plagopterus argentissimus Cope) from the Virgin River in Utah, were weighed and measured. Ratios of body measurements to standard length, and gonad weight to total weight were calculated. From the gonad weight:total weight ratios it was determined that woundfins spawn during a period from April through June, and that the first significant gonad development is during the third year of life. Several body proportions such as, snout length, gape, upper jaw length and peduncle depth grew nearly isometrically. Growth of other body proportions was more or less allometric. Head length, body …

Organization Of The Bird Community Of A Michigan Oak Forest, Jerome D. Wenger

Masters Theses

No abstract provided.

The Fishes Of The Big South Fork Of The Cumberland River System, Charles Edward Comiskey

Masters Theses

This thesis reports the results of a survey of the fishes of the Big South Fork of the Cumberland River system in Tennessee and Kentucky. This system represents the southeasterly extension of the Cumberland River system.

The survey was conducted from June, 1968, to September, 1969, with the majority of the collecting being made in the summer months of both years. A variety of collecting techniques were employed. These included ten and twenty-foot small mesh seine nets, thirty and sixty-foot bag seines, gill nets and sodium cyanide.

A total of sixty-four collections are included, sixty-one made by the author, and …

Abnormal Milk Evaluations In Eastern South Dakota Milk Plants And Dairy Herds, Edwin J. Kleen

Electronic Theses and Dissertations

For many years bovine mastitis has been a major problem for dairy producers, the seriousness of which can be measured by the volumes of literature which have been written about it as well as the economic losses incurred by the dairy industry because of it. The fact that mastitis is still a virulent disease in spite of the vast amount of research conducted on it would suggest either that the underlying causes of mastitis still are not completely understood or that the knowledge gained through research has not been presented effectively to those who need it most—namely the dairy farmer. …

Subalpine Cover Ecology Of Eutamias Amoenus, Eutamias Townsendii And Other Small Mammals In Huckleberry Park, Mount Rainier National Park, Don H. Meredith

All Master's Theses

Little work has been done on the ecology of alpine and subalpine small mammals. They are included in faunal surveys, but little is known of their habits. In the summer of 1969 this study was undertaken in subalpine Huckleberry Park, Mount Rainier National Park, to determine the species of small mammals in the area and some of their relationships with the environment and each other. The relationships between E. amoenus and E. townsendii were of special interest.

An Experimental Study Of The Food Plant Preferences Of The Black Cutworm, Agrotis Ypsilon (Hufnagel), Alan C. York

Masters Theses

No abstract provided.

Studies On The Nutritional Aspects Of Tubificid Worms, Thomas Nelson Seng

Masters Theses

No abstract provided.

A Histochemical Study Of The Ovary Of The Milkweed Bug Oncopeltus Fasciatus (Dallas), With Special Reference To The "Intermediate" Cell, Khian Kioe Liem

Masters Theses

No abstract provided.

The Comparative Morphology Of The Female Gonads Of Two Members Of The Nematode Order Tylenchida, Owen G. Coker

Masters Theses

No abstract provided.

Aging Illinois White-Tailed Deer By The Tooth Replacement And Wear And The Cementum Annuli Techniques, James B. Bertoglio

Masters Theses

No abstract provided.