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:
    title: Characterization of circadian patterns of LH release in stallions in summer and winter
  name:
    name part: Lang, Anita Lynn.
    role:
      role term: creator
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: xx
    date issued: 1993
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    form: remote
    extent: xii, 49 leaves : illustrations ; 28 cm.
  abstract: The objective of this study was to characterize the pattern of plasma LH release in a group of normal stallions in the breeding (summer) and non-breeding (winter) season using frequent blood sampling techniques. Stallions were classified as normal based on semen parameters. Blood samples were collected at 15 min intervals for a period of 24 h in both seasons using an indwelling jugular catheter. A double-antibody radioimmunoassay was used to determine plasma LH concentrations. Mean LH concentration ranged from .39 ︢ .034 ng/ml to 4.34 ︢.191 ng/ml in the summer period and from .34 ︢.027 ng/ml to 5.43 ︢.174 ng/ml in the winter period, with all stallions exhibiting a significant (p< .001) difference in mean plasma LH concentration across the two seasons. However, contradictory to prevalent literature, 4 of the nine stallions had higher mean LH concentration in the winter collection period. No obvious reason was stallions for LH means when samples were pooled across seasons. When the data were separated based on day (0600 to 1800) and night (1800 to 0600) periods, all stallions had higher LH concentrations (p < .0001) during the day in both seasons. Age was also a significant (p < .0001) factor in the research model. Data from this research indicate that stallions display a wide variability in plasma LH concentration and may not be as seasonally predictable as previous literature would indicate. Circadian LH concentration in stallions is affected by age, time of day and season.
  note: by Anita Lynn Lang.
  note: "Major subject: Animal Science".
  note: Vita.
  note: Also available online.
  note: M.S. Texas A&M University 1993.
  note: Includes bibliographical references.
  subject:
    topic: Major animal science
  identifier: https://hdl.handle.net/1969.1/ETD-TAMU-1993-THESIS-L269
  related item:
    location:
      url: https://hdl.handle.net/1969.1/ETD-TAMU-1993-THESIS-L269
  record info:
    record content source: TXA
    record creation date: 960426
    record change date: 20220103134214.0
    record identifier: in00001289343