Digital Commons Network^™

Interrelationships Between Benthic Macroinvertebrates And Habitat In A Mountain Stream, John M. Payne

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study to determine habitat differences of benthic macroinvertebrates was conducted on the upper Strawberry River, Utah. The investigation was part of a large scale project to determine minimum stream flow requirements for trout. The effects of time, habitat, depth and velocity on the distribution of benthic fauna were evaluated.

Samples of benthic invertebrates (146 total) were collected every 2 months at 8 stations on the river from November, 1975 through August, 1976. Representatives of 59 taxa were collected. Eight taxa comprised 90 percent of the mean annual community standing crop in numbers. Biomass was not dominated by any group …

Spectral Signature Studies For Application In Deer Census Using Remote Sensing Techniques, Maran C. Pate

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was performed to determine the spectral signatures of deer and their natural background elements for censusing purposes. Consideration was given to atmospheric transmittance, acceptable flying weather, and terrain. Possible spectral bands between 0.3 and 14.0 μm were obtained (over a pathlength of 1500 feet at an altitude of 5000 feet) based upon atmospheric transmittance using the LOWTRAN 3B computer program. They are: 0.30 - 1.33, 1.49 - 1.79, 2.00 - 2.50, 3.00 - 3.16, 3.38 - 4.10, 4.59 - 5.05, and 8.00 - 13.33 μm, for transmittance greater than 75%. Weather conditions are favorable for flying and taking …

Effects Of Forage Availability On Voluntary Intake And Feeding Behavior Of Grazing Heifers, Anastasios S. Nastis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Forage intake by animals is an important factor in determining production of livestock products from rangelands. However, relatively little is known of effects of such forage variables as availability and distribution in space upon intake. Even less is known about how the grazing animal modifies its feeding tactics when confronted with diminishing or limited supplies of available forage and how such altered behavior may affect the animal's energetic cost for existence. Forage intake, body weight gain, grazing time and biting rate of Angus heifers was related to forage availability and plant height on semiarid crested wheatgrass rangeland during the late …

Population Limitation Of Jackrabbits: An Examination Of The Food Hypothesis, William R. Clark

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The study was conducted to examine the importance of forage resources in limiting peak population density of black-tailed jackrabbits (Lepus californicus). The research design combined field studies of jackrabbit diet and vegetation impact with computer simulation of herbivore nutrition and population dynamics. The relationships between available forage, dietary intake, energy and protein balance and population changes were compared for high and low population density. Hypotheses tested were : (1) Dietary composition is unaffected by availability above 10 kg/ha; (2) Jackrabbits do not require more forage than is available at high population densities; (3) Dietary composition is not significantly …

The Covalent Interaction Of Hepatic Metabolites Of The Insecticide Chlordane With Cellular Macromolecules In The Rat And Mouse In Vitro, Alan A. Brimfield

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This investigation addressed several aspects of the covalent interaction of metabolites of the insecticide chlordane with cellular macromolecules in vitro. Microsomal preparations from the liver of mice and rats were used and covalent binding to microsomal protein and RNA or to added calf thymus DNA was studied. Pure ¹⁴C-labelled cis- and trans-chlordane isomers as well as an isomeric mixture (¹⁴C-cis-chlordane plus ¹⁴C-trans-chlordane 3:1, w:w) were used as substrates for the in vitro system. Biochemical parameters investigated included inhibition of microsomal mixed-function oxidase and epoxide hydratase plus the induction of these enzymes by pretreatment with chlordane …

The Flora Of Leslie Gulch Malheur County, Oregon, James W. Grimes

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study of the flora of Leslie Gulch Malheur County, Oregon was undertaken to elucidate the relationships of the flora and of the endemic species in the flora, and to determine if these endemic species are restricted to their present distribution by chemical factors of their substrate.

A checklist of native plants and a description of the major communities was made and floristic relationships were studied.

Chemical and mineralogical tests such as emission spectrography, x-ray diffraction and cation-exchange capacity as well as physical tests such as particle-size distribution and gravimetric water content were performed.

The results of the tests gave …

A Rapid And Specific Gas Chromatographic Analysis For Cysteine-S-Sulfonate To Determine The Distribution Of Sulfite In Mammalian Plasma, Joseph Don Debethizy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It has been shown in previous studies that when sulfite is absorbed by rabbits via either inhalation of SO₂ or oral exposure to sulfite, the hydrated form, bisulfite, interacts with plasma disulfides where it is suspected to be in the form, cysteine-S-sulfonate. A rapid and specific gas chromatographic analysis procedure for cysteine-S-sulfonate has been developed to better study the distribution of sulfite in biological systems. Sulfonated proteins are enzymatically hydrolyzed to ensure stability of the acid labile S-sulfonate disulfide. The hydrolysate is then applied to a 6 cm cation-exchange column and eluted with 0.1 N HCl which elutes the …

Linear Models For Estimating The Nutritive Value Of Sheep Diets, Michael L. Christiansen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Digestibility data were determined in 2 replications of a 2 x 3 x 2 x 2 factorial arranged experiment to: (1) determine the effects of forage type (grass vs alfalfa), forage maturity (late vegetative vs midbloom vs fullbloom), diet ingredients (forage only vs 50:50 forage plus corn), and diet texture (coarsely chopped vs pelleted) on the digestibility of diet chemical constituents by sheep; (2) develop equations to estimate digestible energy of sheep diets from nutrient content of the diet; and (3) compare popular chemical methods used to partition feed dry matter into fibrous and soluble components. Diets were fed to …

Larval Biology Of Some Utah Chrysididae, Bakary Vassery Ouayogode

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Biologies of eight chrysidid species were described. These wasps parasitized bees and wasps collected in trap nests set at several sites in two canyons near Logan, Utah. The completed nests were taken to the laboratory and the parasitized ones were kept for study of the development a l biology and behavior of both host and parasites.

The larval stages of Chrysura smaragdicolor, Chrysura sonorensis, Chrysis parkeri, Chrysis derivata, Chrysis coerulans, Cerotachrysis enhuycki, Trichrysis doriae and Hedychridium solierellae were studied. Omalus iridescens and Omalus purpuratus larvae were observed only in the fifth instar. The major …

Sodium And Potassium Nutrition Studies Of Halogeton Glomeratus (M. Bieb) C.A. Mey, Ali A. Alhelal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Halogeton glomeratus (M. Bieb) C.A. Mey when grown in nutrient solution, caused the solution pH to decrease very rapidly as plants increased in size, especially during the fifth week of growth. This might be attributed to hydrogen ion exchange for cations. Also, the cation uptake, especially K and Na, may exceed that of the major anions. The control of pH is effective in increasing shoot weights markedly.

In general there was no difference between plants grown at the same NaCl concentration at low and high relative humidity. An increase in plant size, shoot weights, leaf length and diameter was detected …

Coyote-Prey Relationships In Curlew Valley During A Period Of Low Jackrabbit Density, Stephen W. Hoffman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Coyote-prey relationships were examined in Curlew Valley, northern Utah and southern Idaho, during a period of low jackrabbit density (from September 1973 to May 1975). The Utah and Idaho portions of Curlew Valley were treated separately. Field work provided estimates of relative and absolute rodent densities as well as relative coyote density each spring and fall. Laboratory analysis of over 2,300 scats and 249 stomachs provided detailed information on coyote diets. Jackrabbit population data for northern Utah were obtained from L. Charles Stoddart.

Four species, Peromyscus maniculatus, Perognathus parvus, Eutamias minimus, and Dipodomys ordii comprised over 90 …

Pollination Dynamics In Two Subalpine Flower Meadows, Peter Andrew Beedlow Iii

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Plant-pollinator interactions were studied in two subalpine meadows to determine the role of pollination in structuring the herbaceous flower communities. The majority of the entomophilous plant species set significantly less seed when caged to prevent visitation than when exposed to flower visitors. Visitation rate was directly related to temperature and radiation. The number of animal species visiting flowers each week was directly related to the number of plant species in bloom. Most visitor species used ≤3 species of plants, while most plant species hosted ≤8 species of flower visitors. Floral niche breadth increased with increasing animal species diversity, but animal …

An Electron Microscopic Examination Of Spermiogenesis In The Recessive Sex-Linked Male-Sterile Mutant, Ms(1)10s Of Drosophila Melanogaster, Lizabeth A. Perkins

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Electron microscopy of the testes of mutant ms(1)10S of Drosophila melanogaster is characterized by three major defects in the tail region of the developing spermatid. One is the apparent lack of paracrystalline body formation. The second is the loss of the primary derivative as development proceeds, and the third is the breakup and incorporation of the plasma membrane and periaxonemal sheath into membranous whorls. The mutant shows different patterns of axonemal breakup depending on the stage of differentiation in which degeneration begins. Degeneration continues until only cellular debris, scattered axonemal profiles and membranous whorls are all that are seen …

Flowering Vegetation Of South Texas As An Aggregation Site For Screwworm Flies, Cochliomyia Hominivorax (Coquerel), Geral Lenford Long

Theses and Dissertations - UTB/UTPA

Flowering vegetation was investigated to determine its potential as an aggregation site for the mating of screwworm flies, Cochliomyia hominivorax (Coquerel). Fly activity was observed at vegetation on a typical south Texas shrub community. Noted were the species of vegetation present and the phenology of their flowering. Screwworm flies were found to be attracted to specific species of brush; however, in the absence of the most attractive species, the flies responded to secondary species. Both feeding and mating behavior were observed on vegetation.

Olfaction and visual mechanisms of aggregation were investigated. Results from an olfactometer showed the attractancy of some …

Clinical Identification Of Mycobacteria Using Character Order Separation Theory, Mary Beth Frankenfeld

Biology ETDs

The intent in undertaking this thesis project was to set up a practical, economic, and reliable method of species identification for Mycobacteria. This was directed specifically at the clinical laboratory setting.

I began by testing the commonly published identification

tests for accuracy and reproduceability. For many of the commonly used tests the reliability left much to be desired. Several months after beginning my research I learned of an evaluation method developed by Dr. Eugene Rypka at Lovelace Foundation. The evaluation method developed by Dr. Rypka (1960) is based on a separation of characters by considering positive, negative or variable results. …

Unequal Sex Ratios In An Unhunted Mule Deer Population In New Mexico, Pamela Cotton

Biology ETDs

The adult sex ratio and the sex ratio at birth was determined for the unhunted mule deer (Odocoileus hemionus) population occupying the riverbed area of the Bosque del Apache National Wildlife Refuge, Socorro County, New Mexico. The adult sex ratio was computed as the number of yearling and adult males per number of yearling and adult females observed within the effective area of seven linear one-mile transects established on the study area in accordance with the Stake Estimator Technique (Evans 1975). The ratio of 586 males:501 females (117:100) was significantly different from a 50:50 ratio. No evidence was found for …

Abstracts, 91st Session [Iowa Academy Of Science], April 20-21, 1979, Iowa Academy Of Science

Iowa Academy of Science Documents

Presentation abstracts from the annual meeting of the Iowa Academy of Science

The Annual Meeting Of The Iowa Academy Of Science April 20-21, 1979 [Program, 91st Meeting], Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

A New Dipsadine Snake Of The Genus Sibynomorphus From Peru, Douglas A. Rossman, Richard Thomas

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.

Type Specimens Of Birds In The Museo De Historia Natural "Javier Prado," Lima Peru, Manuel A. Plenge

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.

The Relationship Of The Groundsnakes Sonora Semiannulata And S. Episcopa (Serpentes: Colubridae), Darrel R. Frost, Thomas R. Van Devender

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.

Status Of The Nominal Species Of The Fish Genus Xenoophorus (Goodeidae, Cyprinodontiformes) From Mexico, John M. Fitzsimons

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.

Regulation Of The Immune Response To H-Y Antigen In The Mouse, Teresa A. Coons

Biology ETDs

The ability of female mice to reject tailskin grafts from male mice of the same inbred strain appears to be regulated by genes located in the major histocompatibility complex of the female recipient. Cell-meditated responses of “nonrejector” strain female mice, grafted with male tailskin, were studied to better understand regulation of the immune response to H-Y (male) antigen. Both in vivo and in vitro experimental systems were used. Survival of male skin grafts on splenectomized female recipients was compared with survival of grafts on untreated females and on splenectomized females reconstituted with spleen or thymus cell preparations. In addition, we …

Ua77/1 Western Alumnus, Vol. 50, No. 4, Wku Alumni Association

WKU Administration Documents

Alumni magazine published by WKU. This issue has the following articles:

• Harrison, Lowell. Wanted: Your Memories
• Highland, Jim. Dr. John Minton Named Interim President
• An Emotion-Filled Thanks for Harriet and Dero Downing
• Armstrong, Don. C. Ray Franklin Gives Priceless Antiques for Display at Kentucky Museum
• Conway, Sheila. An Iranian Ordeal for Carlton Jackson
• Tharp, Kerry. Larry Cuzzort Blazes to Two-Mile Record
• Salato, Nancy. Speech Clinic Gets New Quarters
• Western Offers Courses for Study Abroad
• Newspaper Course Covers Death & Dying
• Grant Provides Course for Understanding Arts
• Public Relations Students Promote Financial Aid Information
• Medical Technology Students Study in Rural Areas …

Bulletin 3992 - Nitrogenous Fertilisers For Cereal Production, M. G. Mason

Bulletins - 3000 - 3999

Because fertiliser prices continue to rise, it is becoming increasingly important to understand what affects the response to fertilisers by crops.

Among the many factors influencing crop response to nitrogen applications, the most important are the season, soil type, paddock history, time of application and source of nitrogen. Before deciding whether to use nitrogen on a cereal crop, which source to use and at what rate, the farmer needs some understanding of how these factors work.

Immunobiology Of Malaria, Clarence Lee, Yvonne Hogan, Georgiana Aboko-Cole

Department of Biology Faculty Publications

Malaria, the number one disease in the world, is caused by intracellular protozoans belonging to the Subphylum, Sporozoa; Suborder, Haemosphoridia; and Family, Plasmodiidae. The four classical organisms producing disease in man are Plasmodium vivax, P. falciparum, P. malariae, and P. ovale. Although malaria has been known to man for centuries, attempts are still being made to control and eliminate its devastating effects in tropical and subtropical areas of the world. Current active interest in malarial immunology and immunopathology derives from two main facts: (1) that human malaria is still one of the chief health problems in a broad tropical and …

Agricultural Experiment Station News April 1979

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR'S DESK
PERSONNEL ACTION
GRANTS & CONTRACTS
GENERAL NOTES
Journal Abstracts - Submitted for Publication
BULLETINS PRINTED
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - March 1979

Number 8 (April 1979), Southern Fishes Council

Southeastern Fishes Council Proceedings

Distributional Notes on Fishes from Northern Georgia with Comments on the Status of Rare Species. By R.T. Bryant, et al., 4 pp.

Distributional Notes On Fishes From Northern Georgia With Comments On The Status Of Rare Species, Richard T. Bryant, Bruce H. Bauer, Michael G. Ryon, Wayne C. Starnes

Southeastern Fishes Council Proceedings

No abstract provided.

Spermatogenesis In Limnodrilus Hoffmeisteri (Clap); A Morphological And Environmental Study Of The Development Of Two Sperm Types, Edward Michael Block

Dissertations

No abstract provided.