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: Physiological indicators of tick-induced stress in grazing
  name:
    name part: Tolleson, Douglas Ray.
    role:
      role term: creator
  name:
    name part: Pinchak, William E
    role:
      role term: thesis advisor.
  name:
    name part: Smeins, Fred E.
    name part: 1941-
    role:
      role term: thesis advisor.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2010
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    form: remote
    extent: 1 online resource.
  abstract: Three studies utilizing a single group of growing beef steers were conducted to ascertain the effects of tick stress on cattle and to evaluate the use of bio-forensic techniques of detection. Steers (n = 28, 194 ℗ł 3.0 kg) were randomly assigned to one of four treatments in a 2 x 2 factorial arrangement: moderate (14.0 ℗ł 1.0% CP, 60 ℗ł 1.5% TDN) versus low (7.0 ℗ł 1.0% CP, 58 ℗ł 1.5% TDN) plane of nutrition, and control (no tick) versus tick treatment (300 pair of adult (Amblyomma americanum) per treated animal). Steers were individually fed experimental diets ad libitum for 35 days prior to and 21 days following the start of tick infestation (day 0), with peak tick feeding occurring 10 to 14 days post tick infestation. In study 1, blood was sampled on day -7, 0, 7, 8, 9, 10, 11, 13, 17 and 21, and plasma analyzed for metabolic and endocrine indicators. Within the low plane of nutrition, IGF-1 (ng/ml) was greater in control (P < 0.05) than in the tick treated (139.57 ℗ł 9.3 vs 111.4 ℗ł 9.3) group. Within the moderate plane of nutrition, tick treated cattle had higher (P < 0.05) plasma cortisol than nontreated. In study 2, fecal samples were analyzed for metabolic, endocrine and immunologic indicators. Fecal cortisol was the only constituent measured that was affected by treatment and not by plane of nutrition. The highest average daily fecal cortisol observed was for day 13, during peak tick feeding and after six days of repeated blood sampling. In study 3, near infrared spectra were obtained in the 1100-2498 nm range. Spectra were assembled into groups by plane of nutrition, treatment, and by plane of nutrition by treatment. Periods of 7 ℗ł 1 days correspond to significant delineations in the tick feeding cycle. There were differences in pre-infestation versus infestation fecal spectra within the tick treated groups in both the moderate and low planes of nutrition. These differences can not be wholly attributed to tick treatment, but may have also been affected by…
  note: by Douglas Ray Tolleson.
  note: "Major Subject: Rangeland Ecology and Management"
  note: Title from author supplied metadata (automated record created 2010-03-12 12:08:51).
  note: Electronic resource.
  note: Doctor of Philosophy Texas A&M University 2007 http://hdl.handle.net/1969.1/ETD-TAMU-2594
  note: Includes bibliographical references.
  note: Text (Dissertation)
  subject:
    topic: Major Rangeland Ecology and Management
  subject:
    topic: Stress
  subject:
    topic: grazing animal
  subject:
    topic: near infrared spectroscopy
  identifier: http://hdl.handle.net/1969.1/ETD-TAMU-2594
  record info:
    record content source: TXA
    record creation date: 100429
    record change date: 20160914082105.0
    record identifier: in00002569347