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: Interactions of hormones and gonadal development of Tilapia aurea fry
  name:
    name part: Kittler, Marjorie Cynthia.
    role:
      role term: creator
  name:
    name part: Arnold, Keith A.
    role:
      role term: degree supervisor.
  name:
    name part: Davis, James T.
    role:
      role term: degree committee member.
  name:
    name part: Lewis, Donald H.
    role:
      role term: degree committee member.
  name:
    name part: Stickney, Robert R.
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1985
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xi, 85 leaves : illustrations ; 29 cm
  abstract: Gonadal differentiation of Tilapia aurea fry reared under various photoperiods was studied. Histological sections were made of fry gonads from the first free-swimming day through day 20 from samples taken every other day. Three feeding treatments were used for each photoperiod: no hormone, 17-[alpha]-ethynyltestosterone, and 17-[alpha]-ethynyl-estradiol. Statistical analyses show no significant difference in percent of differentiated and non-differentiated fry among the photoperiods. There also was no significant difference in size of fry for each feed treatment among the photoperiods. Fry treated with 17-[alpha]-ethynylestradiol initiated differentiation four days earlier than females not receiving hormone. Males fed 17-[alpha]-ethynyltestosterone initiated differentiation two days earlier than non-hormone treated fry. There was no significant difference in percent of differentiated to non-differentiated fry by age but there was a significant difference in size by age. Differentiated fry were significantly larger than non-differentiated fry. Fry treated with 17-[alpha]-ethynyltestosterone were significantly larger than male fry not receiving the hormone and females, which included both those fed 17-[alpha]-ethynylestradiol and those not given this hormone. Females fed 17-[alpha]-ethynylestradiol were not significantly different in size from females not receiving the hormone.
  note: "Major subject: Wildlife and Fisheries Sciences."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. Texas A & M University 1985
  note: Includes bibliographical references (leaves 58-62).
  subject:
    topic: Fishes
    topic: Sexing
  subject:
    topic: Tilapia
  subject:
    topic: Major wildlife and fisheries sciences
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-596424
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-596424
  record info:
    record content source: TXA
    record creation date: 870815
    record change date: 20220103135457.0
    record identifier: in00000580980
    language of cataloging:
      language term: eng