Search Constraints

Start Over
Filtering by: Advisor Smith, David C. Remove constraint Advisor: Smith, David C. Academic Affiliation Animal Science Remove constraint Academic Affiliation: Animal Science

Search Results

  • The relationship of initial weight to growth rate in preweaning pigs

    Creator:
    Keeler, Joseph Lambert
    Abstract:
    Growth data compiled in this study were collected by using pigs farrowed during the fall, 1963 and spring, 1964 farrowing seasons of the Oregon State University swine herd. Thirty-seven trios of light-, medium- and heavy-birth-weight suckling pigs were used to determine the effect of birth weight on subsequent rate of...
    Resource Type:
    Masters Thesis
    Full Text:
    wishes to express his sincere thanks to Dr. David C, England, associate professor of Animal Science, for

  • Selection for hybrid female reproductive performance in the mouse

    Creator:
    Chapman, Verne Merrill
    Abstract:
    The design of this study was suggested by the following observations: (1) the successful application of recurrent selection techniques in obtaining improvement of hybrid performance in corn and Drosophila, (2) the increased production realized by rotational crossbreeding, and (3) the expression of a relatively large degree of hybrid vigor in...
    Resource Type:
    Dissertation
    Full Text:
    and significant learning experiences and I would like to thank Dr. David C. England for the

  • The fatty acid composition of certain bovine tissues

    Creator:
    Thompson, Robert Charles, 1927-
    Abstract:
    In this study subcutaneous, inter- and intramuscular fats from 42 Hereford steers were analyzed for their fatty acid composition using gas-liquid chromatography. The same tissues were analyzed from one pair each of identical twins of Angus and Shorthorn breeding. Muscle and liver lipids from these latter four animals were fractionated...
    Resource Type:
    Dissertation
    Full Text:
    appreciation to Dr. David C. Church, Associate Professor of Animal Science, for his encouragement and

  • Response of market hogs to periodic changes among nutritionally similar rations

    Creator:
    Hamstreet, John Leslie, 1940-
    Abstract:
    An experiment was conducted during the period November 1967 to November 1968 at Oregon State University (OSU) and the Umatilla Branch Experiment Station (BES) at Hermiston, two trials at each location, to answer several questions: (1) could comparable rations for swine be formulated by a computer on a least-cost basis;...
    Resource Type:
    Masters Thesis
    Full Text:
    MARKET HOGS TO PERIODIC CHANGES AMONG NUTRITIONALLY SIMILAR RATIONS Abstract approved: David C

  • The relationship of blood glucose levels to ovulation rate and early embryonic mortality in gilts

    Creator:
    Day, Paul E.
    Abstract:
    A study was made of blood glucose levels and their relationship to reproduction in gilts. Twelve blood samples, two in each of three successive weeks, before and after breeding were taken. Half of the samples were obtained from gilts in a fasting state and half after feeding. All samples were...
    Resource Type:
    Masters Thesis
    Full Text:
    MORTALITY IN GILTS c:-Redacted for Privacy Abstract approved: David C. E land A study was made of blood

  • Criteria for selection and management in the swine breeding herd

    Creator:
    Page, Edward Bryce
    Abstract:
    Oregon State University swine herd records of four genetic groups were analyzed to determine: (1) the association of occurrence of a small litter (≤ 7) at birth with size of subsequent litters for gilts and sows, separately; (2) the effect of parity, genetic background and litter size on mean birth...
    Resource Type:
    Masters Thesis
    Full Text:
    ma j or professor, Dr. David C. England for his assistance and interest throughout the development

  • Management techniques for induction and synchronization of estrus in prepuberal gilts in confinement

    Creator:
    Schiemann, Calvin Aloysius
    Abstract:
    At weights of 81.5-90.5 kg, 187 prepuberal crossbred gilts were subjected to specific environmental stimuli, for up to 17 days, to determine which stimuli or combinations of various ones would initiate onset of estrus in prepuberal gilts. The stimuli used were: movement to new building, mixing or non-mixing of gilts,...
    Resource Type:
    Masters Thesis
    Full Text:
    ;Redacted for Privacy David C. England, Professor of Animal Science At weights of 81.5-90.5 kg, 187

  • Digestibility of by-product feeds by sheep

    Creator:
    Champe, Karla Ann
    Abstract:
    Two digestibility trials using sheep were conducted to determine the digestibility coefficients of a commercially processed NaOH treated annual ryegrass straw cube. Comparisons were made with loose, chopped ryegrass straw and a ryegrass straw cube processed with molasses as a binder. The NaOH cubed straw was produced by spraying a...
    Resource Type:
    Masters Thesis
    Full Text:
    Champe ACKNOWLEDGEMENTS Many thanks are due to my major professor, Dr. David C. Church, without

  • Cycling and reproductive phenomena in gilts

    Creator:
    Knott, Robert Edward
    Abstract:
    Purebred Yorkshire gilts from a confinement managed herd were reared to test weights away from the sow and boar herd. Thirty-eight gilts weighing between 73 and 80 kilograms constituted group A gilts; 38 gilts weighing between 91 and 100 kilograms constituted group B gilts; and 47 gilts weighing 114 kilograms...
    Resource Type:
    Masters Thesis
    Full Text:
    : Redacted for privacy David C. England, Profa or of Animal Science Purebred Yorkshire gilts from a

  • Reproductive and litter performance of sows mated during lactation

    Creator:
    Walker, Calvin
    Abstract:
    An experiment was conducted with 51 control and 51 experimental confinement- managed purebred Yorkshire sows of various parities to (1) determine whether confinement-managed sows during lactation would exhibit estrus, mate, and conceive as a consequence of a daily regimen of a short period of separation from their litters, mixing sows...
    Resource Type:
    Masters Thesis
    Full Text:
    . To my major professor, Dr. David C. England, for his counseling and guidance throughout my Master of