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: The
    title: evaluation of Macrobrachium rosenbergii and Tilapia aurea polyculture in Texas
  name:
    name part: Rouse, David Benjamin.
    role:
      role term: creator
  name:
    name part: Griffin, Wade
    role:
      role term: degree committee member.
  name:
    name part: Klussmann, Wallace G. (Wallace Glenn)
    role:
      role term: degree committee member.
  name:
    name part: Stickney, Robert R.
    role:
      role term: degree supervisor.
  name:
    name part: Strawn, Kirk
    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: 1981
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xi, 108 leaves : illustrations ; 29 cm
  abstract: The feasibility of polyculturing Macrobrachium rosenbergii and Tilapia aurea was examined in 500 m('2) earthen ponds in central Texas. Monoculture of each species was also undertaken to provide comparative data. Secondary production and water quality were monitored to determine their influences on survival, growth and production of the culture species. Production of freshwater shrimp in 500 m('2) in central Texas was similar to that obtained in other temperate regions of the United States where similar stocking densities and initial sizes have been employed. At a density of 9 shrimp per m('2), average production was 1120 kg/ha. Polyculture increased production above that obtained from shrimp alone. At stocking rates of 9 shrimp and 1 fish per m('2), total production reached 2240 kg/ha. Combining fish with shrimp resulted in a recognizable but non-significant reduction in shrimp growth and survival. Competition for food appeared to be the primary interaction between the two species. The primary factors affecting shrimp growth were temperature, dissolved oxygen, stocking density and food availability. Growth rates were significantly reduced when water temperature dropped below 23C. A 54% decrease in growth rate was observed when dissolved oxygen fell below 5 mg/l. Increased stocking density had a positive effect on production and a negative effect on average size and size distribution. When food became limiting, the population mode shifted toward smaller size classes. The percentage of shrimp occurring in the largest size class was unchanged but the percentage of shrimp in the smallest size class was greatly increased. The overall result was a reduction in average size. Partial budget analysis indicated that net return from culture ponds stocked with shrimp at 8 per m('2) was higher than culture ponds with shrimp stocked at 2 or 4 per m('2). Partial budget analysis also indicated that shrimp-tilapia polyculture had a higher net return than shrimp monoculture ponds and…
  note: "Major subject: Wildlife and Fisheries Sciences."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. in Philosophy Texas A & M University 1981
  note: Includes bibliographical references (leaves 101-107).
  subject:
    geographic code: n-us-tx
  subject:
    topic: Aquaculture
    geographic: Texas
  subject:
    topic: Fish culture
    geographic: Texas
  subject:
    topic: Fishes
    topic: Feeding and feeds
  subject:
    topic: Shrimp culture
  subject:
    topic: Wildlife and Fisheries Sciences
  subject:
    geographic: Texas
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-82248
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-82248
  record info:
    record content source: TXA
    record creation date: 820212
    record change date: 20220104090816.0
    record identifier: in00000076541
    language of cataloging:
      language term: eng