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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 …

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 …

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 …

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.

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 …

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.

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. …

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.

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).

A Physiological Comparison Of Isopods In The Transition From A Marine To A Terrestrial Habitat : With Notes On Their Morphology And Behavior, Gary John Brusca

University of the Pacific Theses and Dissertations

This study is of five species of isopods common to the Dillon Beach area, each of which represents a different level in the transition toward land life. Cirolana harfordi was used as a completely marine form. Idothea (Pentidotea) wosnesenskii represents a step toward land life as it inhabits an area uncovered by most low tides. Ligia occidentalis is found in the splash zone, receiving spray from the action of the surf. This illustrates another, higher, level in the transition. Alloniscus perconvexus was the fourth species studied. It is commonly found burrowed in the sand in the area of the berm, …

The Taxonomy Of A Pentastomid Parasite From An Indian Calotes Versicolor, Shirangam Kuppuswami Krishnaswami

University of the Pacific Theses and Dissertations

The Class Pentastomida is ranked under the Phylum Arthropoda by most authors, but its position is questionable in view of its unusual body structure, and probably the group should be regarded as occupying an isolated place among the invertebrates. The members of the Class Pentastomida are endoparasitic in the respiratory passages and lungs of vertebrates. They are veriform with flattened cylindrical annulated body; they are unique in that the body is non-segmented, but the muscles are metamerically arranged and the integument is chitinous with numerous glands. These data alone would justify the argument that they should be assigned an isolated …

Factors Of The Microclimate Affecting The Activity Of Fox Squirrels In Southwestern Michigan, Frederick K. Courville

Masters Theses

The fox squirrel, Sciurus niger rufiventer, is an important small game animal throughout much of the Midwest. Within the last thirty years several scientific investigations have been focused on this animal, the result being that its life history and ecology are fairly well known.

Concerning the range of the fox squirrel, D. L. Allen (1943:33) states that, in Michigan, the range began to increase with the advent of the pioneers. Baumgartner (1940) and J. M. Allen (1952) noted similar occurrences in their respective states, Ohio and Indiana. In Kansas, the fox squirrel, aided by agricultural land-use, has spread westward throughout …

The Effects Of Hypothermia On Maze Retention In Citellus Spilosoma And Mesocricetus Auratus, John T. Walsh, O.P

Biology ETDs

No abstract provided.

Description Of Elements Of The Life Cycle Of A New Species Of Leucochloridiomorpha (Trematode: Brachylaemidae) From Southwestern Michigan, Jon Shoemaker

Masters Theses

Introduction

During the period extending from September, 1959 to July, 1960, 553 snails, of the species Campeloma decisum, were collected from Portage Creek in the southeast corner of the SE 1/4, Sec. 34, T. 2 S., R. 11 W., Kalamazoo County, Michigan. Metacercariae, closely related to Leucochloridiomorpha constantiae of the monotypic genus, Leucohloridiomorpha, were found in the uteri of several snails. Subsequent studies showed the metacercariae to be an undescribed species. Life history studies showed that this form developed experimentally in the chicken and domestic duck. In this paper stages in the life cycle are described.

Allison (19430, after his …

Notes On The Tardigrades Of Southwestern Michigan, James J. Sawtell

Masters Theses

Introduction

Tardigrades, comprising fewer than 350 species, are microscopic animals which inhabit mosses, lichens, and algae. Tardigrades or "water bears" are distributed throughout the world. These invertebrates are found in fresh-water substrates (Cooke, 1959; Marcus, 1939, Moore, 1939; Pennak, 1940), marine substrates (Chitwood, 1951; Green, 1950; Jeannel et al., 1940; Marcus, 1927, 1946; Pennak, 1953:240; Wieser, 1959) and terrestrial habitats (Cuenot, 1929; Marcus, 1960; Rodriguez-Roda, 1948; Pennak, 1953:240). The "water bears" have also been found in the psammolittoral zone where they live between grains of sand, (Pennak, 1940) and there feed on algal cells (Marcus, 1929). Tardigrades puncture the cell …

Studies On The Role Of The Seed Coat In The Germination Of Rhodotypos Kerrioides, Glenn H. Campbell

Masters Theses

Introduction

The propagation of plants by seeds is often made difficult by dormancy in seeds. A dormant seed is one that will not germinate when it is exposed to conditions favorable for germination. Such seeds will begin growth, however, after they have been subjected to the proper after-ripening conditions. Therefore, the grower must wait several months in many cases before his seeds will germinate. Since it is often desirable to determine the viability of seeds at an early date, seed dormancy has presented a major problem to the farmer. The testing of dormant seeds (4,6,44,56,64,) is widely practiced and rules …

Serum Protein Electrophoresis Study Of Citellus Species, Rondal E. Bell

Biology ETDs

The systematic separation of species of the genus Citellus is based principally on external and cranial features. These features are well known in most of the genus, but there has been considerable uncertainty concerning the subgeneric allocation and a more comprehensive study is needed.

Distribution And Variation Of The Mexican Vole In New Mexico, Clyde Jones

Biology ETDs

The purpose of this investigation is to describe kind and amount of geographic variation of Microtus mexicanus, a grass-inhabiting vole, in New Mexico and some adjacent areas. It was found that environmental conditions, such as amount of moisture, and amount and type of vegatational cover, as well as ecological competition with similar species, seemingly affect geographic variation among populations of M. mexicanus. Among the populations studied, geographic variation in color and size of the auditory bullae is more apparent than geographic variation in other features.

A Study Of The Roots On Stem Cuttings Of Pedilanthus Tithymaloides Smallii (Millsp.) Dressler, Leonard Morrow

Master's Theses

The geographical distribution of Pedilanthus tithymaloides is variously listed as Tropical America (Engler, 1919); from Florida to Venezuela (Taylor, 1936); and Caribbean America (Dressler, 1957). Because of its use as an ornamental, the plant is also found in Mexico, China and Java (Dressler, 1957); Hawaii (Degener. 1940); and Bermuda (Britton, 1918). Banerji (1951) and Rao (1956) have worked with fresh hedge material from India. White et al (1941) report that the species is found growing on the graves of natives in Zululand and Rhodesis, and acknowledge that the introduction "from American into the native kraals is a mystery."

The present …

Relationship Of Certain Environmental Factors To Benthic Fish Densities In Bear Lake, Idaho-Utah, Thomas J. Hassler

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The project was initiated in June of 1958 and financed by the National Science Foundation and the Wildlife Management Department of Utah State University.

The broad aspects of the study were to determine if a relationship exists between certain physical and biological factors and benthic fish densities. The project vas divided into two parts: (l) to determine the time and extent of thermal stratification, zooplankton densities, conductivity changes within the lake and conductivity differences between the lake and its tributaries; (2) to determine it a relationship exist between benthic fish densities, temperatures, depths, conductivities and benthic zooplankton densities. The data …