rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    non sort: An
    title: Evaluation of Growth and Body Composition of Droughtmaster Cattle in Northern Queensland
  name:
    name part: Tucker, Stefen Miles
    role:
      role term: creator
    role:
      role term: author.
  name:
    name part: Herring, Andy D.
    name part: 1965-
    role:
      role term: thesis advisor.
  name:
    name part: Skaggs, C. L.
    role:
      role term: thesis advisor.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2015
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource.
  abstract: The overall objective of this research was to evaluate impacts on growth of Droughtmaster cattle in northern Queensland based on four years (2009-2012) of repeated weight records from a single operation. Animals (total records n = 1,717) were identified by management group (n = 43). Gender consisted of females (n = 786), bulls (n = 386), and steers (n = 545). Age at weight evaluation varied substantially across management groups and was therefore nested within each management group to create a 90-day window. Age, sire, and age of dam, impacted (P < 0.001) weights taken at branding, and, sire and age showed significance at every weight taken (P < 0.001). Age of dam was significant for weaning weight (P = 0.002), but became irrelevant for yearling (P = 0.7252) and final (P = 0.1423) weights. Heritability values for branding, weaning, yearling, and final weight were calculated from estimates of sire variance to be 0.35, 0.42, 0.23, and 0.49, respectively. Heritability values of weight gain from birth to branding, branding to weaning, weaning to yearling, and yearling to final weights were estimated to be 0.23, 0.09, 0.26, and 0.29, respectively. Simple correlations among these traits were evaluated within gender. Female, bull, and steer weights were moderate to highly correlated (0.53-0.77, 0.49-0.85, and 0.70-0.91 respectively). Ranges in correlations were mostly high depending on gender (females 0.68-0.92, bulls 0.53-0.81, and steers 0.70-0.91). Correlations between age and weight varied in strength depending on sex (females, 0.53-0.77; bulls, 0.24-0.79;, steers, 0.48-0.81). Correlations were stronger for traits measured closer in time, and for steers compared to bulls and females. Results correspond to previous reports in numerous breeds. Sire, calf age, and age of dam significantly impact animals' growth during pre-weaning stages; however, influences of these effects were not identical across all genders. The last weight, which was closest to maturity, showed to be…
  note: by Stefen Miles Tucker.
  note: "Major Subject: Animal Science"
  note: Includes vita.
  note: Master of Science Texas A & M University 2015 http://hdl.handle.net/1969.1/155229
  note: Includes bibliographical references.
  note: Text (Thesis)
  subject:
    topic: Major animal science
  subject:
    topic: Growth
  subject:
    topic: Droughtmaster
  subject:
    topic: Beef cattle
  subject:
    topic: Weight
  identifier: http://hdl.handle.net/1969.1/155229
  record info:
    record content source: TXA
    record creation date: 160211
    record change date: 20170928111610.0
    record identifier: in00003607330
    language of cataloging:
      language term: eng