Digital Commons Network^™

A Preliminary Study Of The Siphonapterous Ectoparasites Found On The Mammals Of The Families Cricetidae And Muridae In Utah County, Vernon J. Tipton

Theses and Dissertations

The purpose of this study was to determine the species of fleas infesting the mammals of the families Cricetidae and Muridae in Utah County. This was accomplished by establishing twelve collecting stations throughout the county from which 198 mammals were collected. From these hosts, 392 fleas were collected representing three families, nineteen genera , and twenty-four species. Four species are new to the State of Utah and twenty-two species are recorded from Utah County for the first time.

Some Factors Associated With The Economic Feasibility Of Reseeding Privately-Owned Cattle Ranges In Utah, James R. Gray

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The forage depletion of western ranges which has occurred during the past century is partly the result of the belief by ranchers that the forage loss was temporary and not serious. Should more forage of a high quality be desired they thought it could be produced by reseeding the ranges. The native western forages, never abundant or luxurious by eastern concepts, nevertheless were of generally high qualities. Limited by low and erratically distributed precipitation, the sparse native forages have in many areas given way to low quality plants. These plants of low quality do not have to withstand the adverse …

Seed And Forage Production In Four Clonal Lines Of Alfalfa As Influenced By Lygus Infestation, John Keith Noyes

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

No other forage crop cultivated in the United States can be used in as many ways as alfalfa. The variety of its uses make it a most useful forage crop.

The distribution of alfalfa is world wide and it plays a leading role in the production of livestock and their products. For general feeding of farm animals, alfalfa is unsurpassed. Used for pasture, it has a high capacity, which leads to large gains in grasing animals. If properly rotated and cared for, it adds nitrogen to the soil in a form that is available to plants and thereby increases crop …

Correlation Between The Rh Factor And Landsteiner Blood Groups, Helen M. Zuelzke

Biology ETDs

Eighty-five percent of human beings have an agglutinogen similar to that in rhesus monkeys, now called the Rh factor. This natural antibody is comparable to those which make human blood divisible into the Landsteiner groups A, B, AB, and O. This Rh factor is so called because it was first discovered in the blood of rhesus monkeys. Its importance is that it provides an explanations for previously baffling reactions to blood transfusions and the loss of babies by apparently healthy women during or shortly after pregnancy.

Some Effects Of Inorganic Salts On The Blood Density And Tissue Fluids Of The Bluegill, Lepomis Macrochirus., Roland Abegg

LSU Historical Dissertations and Theses

No abstract provided.

The Apparent Digestibility By Sheep Of Prairie Hay Harvested At Three Stages Of Maturity, Robert Manseau Jordan

Electronic Theses and Dissertations

Grass is the greatest asset of the Northern Great Plains. Grass does and must serve as the basic feed for the flocks and herds of this area. Without grass, much of the Northern Great Plains would be waste land with little or no value. In the states of North and South Dakota, Nebraska, Colorado, Wyoming, and Montana, about 67 per cent of the total land is in pasture and hay. Seventy five to 95 per cent of the total feed needed by cattle and sheep in the Northern Plains states is furnished by pasture and roughage. With an ever-increasing demand …

Systems Of Producing Fat Yearlings For South Dakota, William Clark Mccone

Electronic Theses and Dissertations

About twelve billion pounds of dressed beef and veal were produced in the United States in 1947 through the conversion of grassland crops into meat by cattle and these cattle lead all classes of American livestock in the consumption of grass and grassland crops. Grass usually represents the principal and cheapest feed for beef cattle. They utilize about one third of the permanent pastures and three fourths of the range areas. Pastures may be regarded as a costly source of feed only on highly productive farm lands, but their use in rotation with cultivated crops on such land is certain …

The Effect Of Age Of Gilt On Size Of Litter, Clifford Inman Iverson

Electronic Theses and Dissertations

Size of litter is an important consideration in determining the profits from a swine production enterprise. Basic information concerning factors affecting litter size is, therefore, pertinent to the swine production industry. This study was conducted to ascertain the effect of age of gilt on the size of their first litters.

Studies On Larval Trematodes From Tomales Bay, California, Leroy H. Fisk

University of the Pacific Theses and Dissertations

Very little is known of the development, life history, economic importance, of biological relationships of larval trematodes, especially in their molluscan and arthropod hosts on the Pacfic Coast. The comparatively few contributions to our knowledge have been from scattered and fragmentary observations. The purpose of this study was to expand our knowledge and to lay a foundation for further work on trematode life cycles in marine organisms. The area selected for special investigation was Nick's Cove, Tomales Bay, California.

A Survey Of The Adult Trematodes From Fishes Of The Pacific Marine Station Area, William Franklin Johnson

University of the Pacific Theses and Dissertations

An effort is here made to assemble all of our knowledge of all adult trematodes which have been found in the fishes of the Pacific Marine Station Area. This includes publications, unpublished material such as graduate theses, and specimens herein described for the first time. It is hoped that this endeavor will facilitate further investigation in trematodology and that this paper will be an aid in identification of trematodes subsequently discovered.

A Life History Study Of The Ground Squirrel Citellus Spilosoma Major (Merriam), Ferd Sumrell

Biology ETDs

The purposes of this study are (1) to determine the various habits and activities in the life cycle of the spotted ground squirrel; and (2) to compare these data with those found by other writers for similar species within the genus Citellus.

Drug Plants Of California, Frederick Louis Beauchamp

University of the Pacific Theses and Dissertations

Many books and articles have been written covering the flora of California. Few, however, have dealt specifically with those plants yielding drug principles used in the materia medica of the medical and pharmacy professions. Over one thousand different species of native and introduced drug plants are growing in the state. Many of these, it is true, have fallen into disuse, either because of lack of medicinal value, or substitutes have been found in the laboratories of the chemist.

The development of the drug farming industry will not only give employment to the state’s increasing population, but will enable our nation …

Studies On The Genetics Of Ceratostomello Fimbriata ., Edward Orlando Olson

LSU Historical Dissertations and Theses

No abstract provided.

Decays Of Citrus Fruits And Their Control., Jaime Guiscafre-Arrillaga

LSU Historical Dissertations and Theses

No abstract provided.

Insertion Of The Extrinsic Eye Muscles Of Vertebrates., Aeleta Nichols Barber

LSU Historical Dissertations and Theses

No abstract provided.

Agarics Of The Louisville Area : A Taxonomical Problem., Eugene H. P. Mondeau

Electronic Theses and Dissertations

No abstract provided.

Separation Of The Selenium Compounds In Seleniferous Plant Protein Hydrolysates By Paper Partition Chromatography, Arnold L. Smith

Electronic Theses and Dissertations

In 1943 Franke reported that the protein of "allolied" or "toxic" wheat carried the toxicant, and Franke and Painter in 1935 reported that those "toxic" proteins contained selenium which was in organic combination in the protein. There has been much speculation regarding the possibility of selenium replacing sulfur in the amino acids cysteine and methionine. The toxicity of selenium in selenium analogs of these compounds is similar to that of selenium occurring naturally in proteins seleniferous cereals, which indicated that the selenium may be present in the proteins as the analogue of these sulfur amino acids.

A Study Of The Heel Flies, Hypodermia Lineatum Devillers And Hypoderma Novis Degeer, In South Dakota, John A. Lofgren

Electronic Theses and Dissertations

The heel flies or ox-warble flies and their larvae, commonly called cattle grubs or warbles, are among the most troublesome and costly insect pests of livestock producers in South Dakota. These parasites attack cattle almost exclusively although they may occur at times in other domestic and in wild animals. Infestations in man have been recorded, but these cases are quite rare. This work deals only with the occurrence of the parasites in cattle.

Variations In The Gross Anatomy Of The Heart Of Rana Pipiens, Leslie Wingate Wilson

Masters Theses

There were three purposes for this study. The first purpose was to determine the normal anatomy of the major structure of the heart of Rana pipiens. The second purpose was to determine if any variations or anomalies existed in these structures. The third purpose was to determine if any similarity existed between any variations found and the hearts of other animals.

The normal anatomy of the frog heart, as described in most books, is either incomplete, wrong, or applies to species other than Rana pipiens. In no case was there an adequate description found of the heart as …

Distribution Of The Herpetofauna Of Kentucky., Symoine Kamin Laufe

Electronic Theses and Dissertations

Although the herpetofauna of Kentucky is extensive and varied. it has received much less attention than that of most other states. Many herpetologists have reported on various phases of the state's amphibians and reptiles, but for the most part these reports are discrete, either pertaining to a collection, or a generic or specific study. Hence, there is no single adequate work which aptly describes the herpetology of Kentucky as a whole. When one realizes the keystone position of Kentucky in relation to northern and southern forms, the need of a zoogeographical summary of the state becomes even more apparent. Therefore, …

A Study Of The Effects Of Some Chemical And Physical Factors On Plankton In An Artificial Lake, Archie Garnett Smither

Master's Theses

It has been well established that chemical and physical factors exert a marked effect upon the plankton population in bodies of water. However, the literature reveals the fact that the same chemical and physical factors not only produce a different effect upon plankton in different bodies of water, but are not consistent in their effects upon plankton in like bodies of water. For example, Birge and Juday (1911) made a study of 150 lakes, not widely separated in distance or varying in topographic conditions. These lakes were also of the same age, yet all were individual as to the amount …

Studies In The Families, Magnoliaceae, Illiciaceae And Schisandraceae Of Szech'uan, China, Ching-Yung Cheng

Masters Theses

Object of this study: Since the family Magnoliaceae was first described by J. H. Jaume St. Hilaire, its limit has been discussed and treated in various ways by different authors. The tendency of the treatments, however, is always to separate the remotely related groups and break this heterogeneous family into more homogeneous and well defined ones. According to Bentham & Hooker, Magnoliaceae includes three subfamilies, namely Magnolieae, Wintereae and Schisandreae. This treatment was followed by most authors until 1926, when Hutchenson broke these into three separate families: Magnoliaceae, Winteraceae and Schisandraceae. Recently, A. C. Smith separated Illicium from Winteraceae, and …

The Importance Of The Spleen In Antibody Formation, Carl Frederick Cramer

Biology ETDs

It was the purpose of the phase of the investigation to ascertain:

(1) If there is a significant difference in infection or fatalities among splenectomized animals.

(2) If splenectomized animals can form antibodies, and to what degree.

Effects Of Various Fluorine Compounds On The Albino Rat, Robert Floyd Pevahouse

Masters Theses

At the beginning of the 19th century, an Italian chemist demonstrated the presence of fluorine in the teeth of both man and animals. This discovery created considerable interest at that time and can probably be considered the initial step in stimulating research on the problem.

In the light of our present day knowledge, there is evidence that the ingestion of small amounts of fluorine may be distinctly beneficial to livestock. However, the primary problem in animal nutrition is concerned with definitely harming effects resulting from an excessive intake.

It was only a few years ago that farmers were using raw …

Studies On The Microcrustacea Of Three Montane Lakes In Glacier National Park, Montana, Robert O. Megard

Biology ETDs

Grinnell Lake, Lake Josephine, and Swiftcurrent Lake, at an elevation of approximately 5,000 feet in northwestern Montana, are comparable with lakes in the montane zone defined by Pennak for lakes at elevations between 8,200 feet and 10,500 feet in the Rocky Mountains of northern Colorado. Five species of Copepoda, six Cladocera, and four Ostracoda were collected in the lakes studied. The population of microcrustacea in these lakes was most dense in or slightly above the masses of rooted aquatic vegetation growing to a height of six to 10 inches above the bottom wherever the water was between three feet and …

The Development Of The Megagametophyte Of Zea Mays Variety Golden Bantam Hybrid, William Richard Widner

Biology ETDs

Ever since the first publication, in 1919, on megasporogenesis in Zea mays, some confusion has existed regarding the detailed sequence of certain changes in the development of the megagametophyte. The present study was made in an attempt to clarify such disputed points.

Studies Of Increment, Height-Weight, And Moisture Content Of Important Western Kansas Grasses., John Launchbaugh

Master's Theses

A logical approach to the question of how much forage is taken by livestock would be, it seems, to study first the growth habits of the important species of p:i.sture and range grasses in the areas where they are used. The purpose of this report, therefore, was to stud y the development of several species of perennial grasses in the mixed prairie of west-central Kamas from near the beginning of the grazing season until the grasses had reached maturity.

The Ecology Of A Pasture In The Dakota Sandstone Formation In Ellsworth County, Kansas, Byron O. Blair

Master's Theses

The vast area of prairie of the United States has long been known as the "feeding grounds" for herbivorous animals. In the past, the standard of living of the people of grassland regions has been measured largely by the ability of the native ranges to produce ·vegetation sufficient to maintain economical livestock production. It has become apparent that if our desired living standard is to be maintained, we must direct our efforts toward a program by the most rapid and efficient means possible, which will bring economic stability to the seventeen million acres of grassland in the Great Plains region. …

The Construction Procedure Of The Saline River Habitat Group In The Fort Hays Kansas State College Museum., William Raymond Eastman

Master's Theses

The development of the museum wild life habitat group in recent years has created much public interest here in the College museum many people have expressed a desire to see such a habitat group related strictly to Kansas , particularly Western Kansas . The year of such a group was not particularly expressed, but as preliminary visions developed, it seemed only reasonable that the public would enjoy a glimpse of Kansas in the days when it was making early history . Thus it was decided to design and execute a life-sized habitat depicting the ecological relationship s found between the …

Minor Elements In Plant Growth, Vangy A. Tilton

Biology Honors Papers

This thesis describes the relationship between plants and elements found in the soil and relates an experiment with lead solutions to determine the effect of that ion on plant growth.