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 freshwater as a treatment for amyloodiniosis in red drum
  name:
    name part: Harris, Courtney Elaine.
    role:
      role term: creator
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: xx
    date issued: 1999
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    form: remote
    extent: x, 55 leaves : illustrations ; 28 cm.
  abstract: The ectoparasitic dinoflagellate Amyloodinium ocellatum is a problem of long standing in marine aquaria and recently has emerged as a cause of mortality also in marine food-sh-production facilities. The parasitic stage (trophont) attaches to the gills, skin, and fins of host fish such as red drum (Sciaenops ocellatus), a euryhaline teleost cultured intensively for seafood in Texas and other Gulf states. Amyloodinium ocellatum has a wide range of tolerance to salinity, but freshwater exposure is considered an effective therapy for infested fish. Bioassays were conducted to determine the intervals of time A. ocellatum-infested red drum need to spend in freshwater to result in various degrees of trophont detachment from the gills. Results resolved the time dependency of trophont detachment on freshwater exposure, but also indicated substantial effects of infestation age and of fish weight and group identity. Freshwater dips were generally effective in causing trophont dislodgment from A. ocellatum-infested red drum at an instantaneous rate of 20% per minute. Within the first 24 h of infestation by a trophont generation, however, effectiveness of a freshwater dip varied markedly with fish group. Fish groups fell into two sets, inferred to be comprised of fish with and without prior exposure to A. ocellatum. In putatively "nav̐e'' fish, freshwater dips were not effective in dislodging A. ocellatum trophonts younger than 24 h; in putatively "immune'' fish, trophonts of any age detached from the gills when exposed to freshwater. A computer simulation model was constructed to represent the A. ocellatum life cycle and the effects that freshwater exposure had on this cycle. Experimental results and information from the literature were integrated to model the joint effects of infestation age, the fish's weight, prior exposure to the parasite, and duration of freshwater exposure. The simulation model was most successful in explaining parasite load for red drum with A. ocellatum…
  note: by Courtney Elaine Harris.
  note: "Major subject: Wildlife and Fisheries Sciences".
  note: Vita.
  note: Also available online.
  note: Issued also on microfiche from Lange Micrographics.
  note: M.S. Texas A&M University 1999.
  note: Includes bibliographical references (leaves 49-53).
  subject:
    topic: Major wildlife and fisheries sciences
  identifier: https://hdl.handle.net/1969.1/ETD-TAMU-1999-THESIS-H373
  related item:
    location:
      url: https://hdl.handle.net/1969.1/ETD-TAMU-1999-THESIS-H373
  record info:
    record content source: TXA
    record creation date: 000405
    record change date: 20220103134241.0
    record identifier: in00001525267