Life Sciences Commons^™

A Determination Of Stelar Patterns In Various Root Divisions Of Certain Angiosperms, Serafin Ramon

Biology ETDs

Root systems from ten species of desert angiosperms were collected and examined histologically to determine the xylem patterns of the primary, secondary, and tertiary roots. The plants used in the study were Cleome serrulata Push, Croton texenis (Klotzch) Muell. Arg., Franseria acanthicarpa (Hook.) Coville, Gutierrezia microphala (D.C.) Gray, Mentzelia albicaulis Dougl., Kochia scoparia (L.), Ratibida columnaris (Sims) D. Don, Salsola kali (S. pestifer A. Nels.), Tribulus terrestris L., and Berbana macdougalii Heller.

Food Availability And Selective Utilization By Juvenile Mallards (Anas Platyrhynchos Platyrhynchos L.) On The Bear River Migratory Bird Refuge, Utah, Nicholas J. Chura

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This investigation was devoted to a study of food availability and the selective utilization by juvenile mallards (Anas platyrhynchos platyrhynchos L.) from hatching through the flight stage. Such information furnishes basic knowledge which may be used for determining the effects of chemical poisons on these organisms, how breeding ground habitats could be manipulated for their most efficient use by duckling species, what nutrients occur in natural duckling foods, and the digestibility of these items. The Bear River Migratory Bird Refuge, Utah, was used as the study area during the waterfowl breeding seasons of 1959, 1960, and 1961. Mallard ducklings …

The Effects Of Radium On Certain Goldfish Blood Constituents And Organs, D. Wayne Linn

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Background radioactivity from radium has long existed in ground and surface waters of the United States, but in the last 15 years radium has become a consequential unnatural contaminant of waters (Coulomb, 1955; Rone, 1952; Schlundt, 1910; Scott and Barker, 1956; Scott, 1961; and Tsivoglou et al., 1958). The onset of the atomic age initiated the increased processing of uranium ore for its uranium content. Radium is a daughter product and a by-product of uranium ore and its purification (Glasstone, 1958; and Tsivoglou et al., 1958). The uranium refinery wastes are released into streams in which all forms of aquatic …

Factors Affecting The Waterfowl Hunter Utilization And The Waterfowl Kill At The Bear River Migratory Bird Refuge, 1960-61, Stephen V. Goddard

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In 1960 there were 1,955, 000 waterfowl hunters in the United States. These hunters spent $89,431, 000 (an average of $45.74 per individual) and 15,158, 000 hunter days in the field. The hunting population will increase 35 percent by 1975 (Anonymous, 1960).

The large increase in hunters will bring a proportional increase in the demand for places to hunt. Many states face the problem of providing enough public hunting for such an army of sportsmen. Studies by Kozlik (1958) in California, Gordinier (1957) and Friley (1959) in Michigan, and Bednarik (1957, 1961) in Ohio point out some of the problems …

A Comparison Of Cock Pheasant Harvests Among Areas Having Different Hunting Pressures, Cache County, Utah, James C. Bartonek

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Parsons (1953) found Utah's posted hunting unit system regulated hunting pressures over much of the state's pheasant range. He found inequalities of hunting pressure among the posted hunting units because of their individualistic methods used to determine the number of hunting permits to be sold. Utah State Department of Fish and Game personnel recommend the number of permits to be sold by the hunting unit; but often, the hunting unit officers use the desired level of hunting pressure, size of cock harvest, and revenue from permit sales as decisive factors. By regulating hunting pressure on their own lands the posted …

A Study Of Body Water In Active And Hibernating Ground Squirrels, Citellus Lateralis Lateralis And Citellus Spilosoma Marginatus, Lawrence R. Klinestiver

Biology ETDs

The present studies were designed to evaluate dehydration as a factor in determining duration of hibernation. Skin temperatures were utilized to indicate the condition of hibernation. Two species of animals, Citellus lateralis and Citellus spilosoma, from two different ecological areas, were studied for the purpose of determining whether tolerance for deprivation of water would indicate changes in water content of tissues during hibernation. If hibernation is limited by dehydration of body tissues, then animals with a greater tolerance for dehydration may hibernate for longer periods. The following experiments were designed to evaluate the effects of dehydration on active and …

A Survey Of Parasitism In A Population Of Pigeons, Robert Flynn Jochen

Master's Theses

Numerous papers relative to parasites in pigeons can be found in the literature, but information concerning parasitic infections in pigeons of Virginia is scant, and no survey of parasitism has been made. Furthermore, no one survey or parasitism in pigeons of North America has included the incidence of both ectoparasites and endoparasites. Information relative to the incidence of individual parasites or groups of parasites, however, is available in recent literature, as well as information concerning isolated cases of parasitism

The present study was undertaken to (1) determine the nature and extent of parasitism in a population of pigeons in Henrico …

Metabolic Rate And Body Weight Measurements Of Dipodomys Ordi And D. Merriami Under Various Stresses Of Dehydration, Nancy Rose Benally

Biology ETDs

It is of interest to investigate the possible effect of a new synthetic steroid, Aldactone, on the total body weight of the rodent Dipodomys. In addition, the present study includes the effect of dehydration and of high salt intake on the oxygen consumption of the Dipodomys, in a resting state.

Redescription Of The Adult Water Mite Hydrachna Miliaria And Description Of Its Life History, David Lou Kass

University of the Pacific Theses and Dissertations

During the summer of 1957 the writer became interested in water mites while collecting insects in an unnamed pond (see map in appendix) near Tomales, California. It was noted during that period that specimens of a giant water-bug, Lethocerus americanus Leidy (1847) had many larval mites attached to their ventral sides, and the lack of information concerning these animals and their life histories stimulated interest in investigating the problem detailed in this thesis. This work was begun in the summer of 1957 and has continued through the summer of 1959 and 1960.

Due to the lack of information and lack …

A Study Of Nematode Parasites Of Some California Salamanders, Herbert Bruce Johnston

University of the Pacific Theses and Dissertations

Little information is available concerning the nematode parasites of salamanders in California. Lehmann (1954) reported the finding of Oxyuris dubia Leidy 1856, in the rectum of 33 Ensatine e. Eschscholtzii from Sonoma County, California, and in 3 of 10 Batrachoseps a. Attenuatus, from San Francisco County, California. He also reported Oxyuris magnivulvaris Rankin 1937 in the rectum of 1 to 2 Aneides flavipunctatus, from Marin County, California and Rhabdias sp., from lungs of 2 of 12 aquatic Triturus torosus from Contra Costa County, California. Lehmann (1960) reported O. dubia from the cloaca of 1 Aneides flavipunctatus and 3 Aneides lugubris …

Cytochemical Studies On Trypanosoma Ranarum, Richard Cecil Brown

University of the Pacific Theses and Dissertations

The location of structures within an organism and the chemical nature of these structures can be determined by cytochemical techniques. Further, such techniques may be used to demonstrate the presence of an enzyme or an enzyme system within the cell. This information can assist in the elucidation of metabolic pathways available to an organism. Despite the apparently large potential value of cytochemical information, few investigations of the cytochemistry of trypanosomes have been reported, and there are no reports available of studies upon cultural forms.

Nigrelli (1929) utilized vital stains and osmic acid impregnation in studies on cytoplasmic inclusions in Trypanosoma …

Studies On The Gonadal Pigments Of Cryptochiton Stelleri (Middendorff), Robert Eugene Senff

University of the Pacific Theses and Dissertations

The large gumboot chiton, Cryptochiton stelleri, (Middendorf, 1846) annually undergoes a reproductive cycle terminated by spawning in the spring. Cryptochiton stelleri is one of the marine invertebrates which possess carotenoid prognosis. Cryptochiton acquired its carotenoid moiety from the algae upon which it feeds. Following digestion carotenoids are transported to various sites in the body. The mechanisms and routes of this transport, as well as the eventual fate of the carotenoids in nutrition, are unknown. Perhaps storage in the animal occurs because of an inability to eliminate the carotenoids. On the other hand, the presence of carotenoids in the gonads would …

Relative Growth In Some Antarctic Pycnogonida, William Granow Fry

University of the Pacific Theses and Dissertations

Work on the systematics of a large collection of Antarctic Pycnogohida has revealed very forcibly the limitations of existing systems of classification of this group. In an attempt to rectify some of these shortcomings for a monograph on the pycnogonid fauna of the Ross Sea area, the author has been led to seek new characters and character states which will be useful in taxonomy.

Virtually nothing is known of pycnogonid behaviour and ecology, and it seems unlikely that additional knowledge in these fields will be forthcoming in the near future. Our knowledge of pycnogonid comparative anatomy and histology is also …

The Origin And Development Of Sclereids In The Leaves Of Camellia Reticulata Lindl, Chris Kelvin Kjeldsen

University of the Pacific Theses and Dissertations

This study is concerned primarily with sclerenchymatous idioblasts. These idioblasts are polymorphic, and are commonly termed sclereids. The term sclereid is derived from the Greek work skleros (meaning hard). The hardness of sclereids and sclerenchyma tissue is due to their thickened cell walls, which are for the most part lignified. Their principal function is mechanical giving strength to plant tissue organs, therefore, enabling them to withstand various environmental stresses.

This paper deals with the foliar sclereid type of sclerenchymatous idioblast. The study of sclereids raises many of the fundamental problems of botany. Some of these are: growth and development, senescence …

Biology Laboratories, Facilities, And Activities In Representative Oregon High Schools, Norman D. Graybeal

Dissertations and Theses @ UNI

The laboratory activities that are included in high school biology and the laboratory facilities that are available for use in these activities will be considered in this investigation. Information for this study will be obtained from public senior high schools of the state of Oregon.

Taxonomy And Ecology Of Fresh-Water Ostracods Of South-Central Texas, Charles Davidson Wise

Biology ETDs

The Ostracoda (Gk. ostrakon, a shell, and eidos, form) are extremely interesting crustaceans that differ from most crustaceans in possessing strongly calcified, bivalve carapaces, Ostracods occur in great abundance in all types of waters, both marine and non-marine. With the exception of very transient waters, probably as many as 90% or more of the bodies of fresh water in North America contain ostracods. Because the carapaces are easily fossilized, ostracods are abundant in deposits ranging from the Ordovician to the present.

Investigation In The Physiology Of The Spore Formation Of Pseudoples Trifolii (Rostr.) And Petr., Emory S. Crosby

Masters Theses & Specialist Projects

Plant pathologists have worked to some extent for many years in an attempt to describe the complete physiology of the organism responsible for pepper spot of clover, particularly as found on white clover (Trifolium repens, L.). These works have not been extensive or concentrated and at the present time, no definite conclusions have been reached.

The causal agent of pepper spot of clover is Pseudoples trifolii (Rostr.).

Pseudoples trifolii usually is found parasitizing clover in the early spring and continues throughout the spring until the temperature exceeds thirty degrees centigrade. Elliott established that Pseudoples trifolii will not produce infectious spores …

The Hemodynamic Changes In Anesthetized Dogs Subjected To Hypoxia And Cold, Virden A. Dohner

Biology ETDs

The combined effects of hypoxia and cold no doubt were known by the ancients in the areas of the world where there are mountains of considerable height. But the ancients feared the mountains (6) and therefore have left no precise information which might incline one to believe they noted symptoms of physiological significance.

Determinants Of Occurrence And Distribution Of Fungi In Marine Environments, Paul W. Kirk

Master's Theses

Studies ware made of the effects of temperature and nutrient levels on salinity optima for growth and sporulation of Chaotomium Globosum and two marine Pyranomycetes, Torpedospora radiata, and Halosphaeriopais sp. Methods of culture and evaluation of sporulation were also investigated.

Discussion focused on ecological implications of data, in particular, on the probable survival value to a marine-fit fungus or a Phoma pattern mechanism-envolving vegetative and reproductive phases. As the seasons progress, the region where concentrations and proportions or salts are most favorable remains similar to that where vitamin requirements are least and biotic factors are most favorable.

Evaluation Of Hydroxyprogesterone Acetate In The Prevention Of Canine Estrus, Kenneth B. Haas

Masters Theses

Foreword

Thirty years ago, endocrinology was a laboratory curiosity appreciated by few veterinarians. In those rare instances when the new science escaped from the laboratory and reached the clinic, the endocrine preparations used were extremely crude and often ineffective. In the growth of endocrinology as a science, availability of pure crystalline hormones has played an essential role, and to chemical synthesis must be credited the preparations which make specific endocrine therapy possible today.

In the last two decades endocrinology has come into its own in veterinary medicine, especially in regard to sex endocrinology. But only in the last ten years …

Blood Oxygen Capacity Of Birds, J. R. Powell

Master's Theses

Avian blood oxygen capacity (BOC: Vol. %) was measured by a modified Roughton - Scholander syringe method with regard to parameters of body weight and sex. Two samples, collected from the Richmond vicinity, were investigated: the domestic pigeon (Columba livia Gmelin) and 25 other bird species.

A Study Of The Mitotic Karyotypes Of Five Species Of Culicine Mosquitoes Found In New Mexico, David A. Laycock

Biology ETDs

Karyotypic studies were made of five species of mosquitoes: Culex tarsalis Coquillett, Culex pipiens quinquefasciatus Say, Culiseta incidens (Thomson), Psorophora signipennis (Coquillett), and Aedes dorsalis (Meigen). Slides of tissue from the limb buds were prepared by the squash technique. All five species were found to have a diploid number of six. The study shows that Aedes dorsalis, Psorophora signipennis, and Culiseta incidens have virtually identical mitotic karyotypes, with two pairs of large and one pair of somewhat smaller chromosomes. Culex tarsalis and Culex pipiens quinguefasciatus have karyotypes that contain three sizes of chromosomes. In Culex tarsalis there are obvious size …

A Comparative Study Of The Antidiuretic Hormone Bio-Assay Using Three Species Of Bufo, Jeanne Marie Jordan

Biology ETDs

This study was designed to (1) determine and compare the sensitivity of three species of Toads of the genus Bufo to the hormone Pitressin, a commercial anti-diuretic hormone, (2) determine and compare the suitability of three species of Bufo as subjects in anti-diuretic hormone bio-assay, and (3) compare the physiological responses of the three species to the injected hormone.

Influence Of Auxins On Growth And Development Of Excised Embryos Of Pinus Ponderosa, Virgil K. Howe

Biology ETDs

The purpose of the experiment was to examine the influences of selected auxins upon seedling development post germinal cultures of excised embryos of Pinus ponderosa Laws (ponderosa pine). Seedlings were studied on an agar medium and later in quartz sand with added nutrients.

Some Aspects Of The Life History Of The Silky Pocket Mouse In New Mexico, Richard B. Forbes

Biology ETDs

Pocket mice of the subgenus Perognathus, especially those of the little known species Perognathus flavus Baird, present several interesting ecologic and taxonomic problems. A prerequisite of studies of these problems is a knowledge of extent of individual morphological variation attributable to age. A purpose of his paper is to investigate the relationship of age to size, molt and pelage, reproductive activity, and season in the silky pocket mouse. Another purpose is to analyze the summer food habits of P. flavus as revealed by study of several large series of pocket mice collected during August of 1958.

Mammals Of Mount Taylor, Valencia County, New Mexico, Eugene E. Schroeder

Biology ETDs

During the summer of 1960, three months were spent in making a comprehensive study of the kinds and ecological distribution of native mammals in and above the Transition Zone on Mount Taylor of Valencia County, New Mexico.

Mount Taylor, and old volcanic pile, rises 11,301 feet above sea level. Three boreal life zones, the Transition, Canadian, and Hudsonian were assigned to Mount Taylor.

Small mammals were collected by two sampling methods, quadrant and line trapping. However, mist nets were used for capturing bats. Quadrants were placed in various plant communities for three successive nights. Numbers and kinds of mammals recorded …

Science: In The Pursuit Of Truth And The Furtherance Of Understanding, Wayne Warde Wantland

Honorees for Teaching Excellence

No abstract provided.

Geographic Variation Of The Hispid Cotton Rat In New Mexico, A.L. Gennaro

Biology ETDs

A total of 520 cotton rats, Sigmodon hispidus, was examined to determine the kind and amount of geographic variation of these animals in New Mexico.

The distributional history of Sigmodon hispidus in New Mexico may be revealed by a relationship between color variation of these animals and soil color of areas from which these animals were taken. This relationship suggests, firstly, that Sigmodon hispidus has occupied the southern Rio Grande Valley for a longer period of time than it has areas east of the Rio Grande Valley, and secondly, that Sigmodon hispidus has only recently occupied the Deming Plain. …

The Effects Of Certain Environmental And Biological Factors On Rally Calling In The Chukar Partridge, H. Warrington Williams

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Naturalists for many years have known that birds sing most at dawn and at dusk, but to which of many physical variables they are responding has not been completely determined. This problem has taken on importance in the field of wildlife management because calling rate has been used as an index of abundance for numerous game birds, namely the Pheasant, Phasianus colchicus (Kimball, 1949); the Mourning Dove, Zenaidura macroura (McClure, 1939); the Bobwhite Quail, Colinus virginianus (Bennitt, 1951; Rosene, 1957): and the Woodcock, Philohela minor (Pitelka, 1943).

Studies On The Relationship Of The Redside Shiner (Richardsonius Balteatus) And The Longnose Sucker (Catostomus Catostomus) To The Cutthroat Trout (Salmo Clarki) Popluation In Yellowstone Lake, Kenneth E. Biesinger

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Biologists have been concerned about the presence of longnose suckers (Catostomus catostomus) and redside shiners (Richarsonius balteatus)and their effect on the cutthroat trout population in Yellowstone Lake. This investigation was made to determine the distribution and certain interactions of these species with cutthroat trout in Yellowstone Lake. The effects of the presence of lake chub (Hybopsis plumbea) and longnose dace (Rhinichtys cataractae) are considered to a lesser extent.