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: Reproductive peformance of great egrets (Ardea alba) at High Island, Texas
  name:
    name part: McInnes, Andrew.
    role:
      role term: creator
  name:
    name part: Knock, Susan L.
    role:
      role term: thesis advisor.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2012
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource.
  abstract: Despite habitat perturbations and seasonal fluctuations in reproduction, many studies report no significant inter-annual variation in Great Egret reproductive performance. I examined the reproductive performance of Great Egrets (Ardea alba) for two breeding seasons (2009 and 2010) immediately following Hurricane Ike at High Island, Texas. Breeding success, productivity, and mean brood size did not differ between years (U-test, P > 0.05). Fledging success at 21 days showed no significant difference between years, however fledging success at 28, 35, and 42 days decreased significantly between years (~15% reduction at 42 days; U-test, P = 0.027). The number of deaths per nest also differed significantly between 2009 and 2010 (0.36 and 0.95, respectively) (U-test, P = 0.013). Brood-size dependent mortality was also a significant between-year parameter (H test, P = 0.003). Successful nests in 2009 had a brood size range of 2 to 3, and of these nests, 6% and 50% experienced partial brood reduction, respectively; whereas 2010 brood size range for successful nests was 2 to 4, and 0%, 57%, and 100% of these nests, respectively, experienced partial brood reduction. Other parameters examined were water level, temperature, precipitation, prey availability, and human disturbance. I rejected my hypothesis that habitat conditions would be less conducive to high reproductive success in 2009 than 2010, due to the impacts of Hurricane Ike. My results suggest that Great Egrets have bimodal occurrences of nestling death that are expressed as a function of brood size, hatching spread, and nestling age. Reproductive performance studies should continue through at least fledging age (42 days post-hatching for Great Egrets) to better document the reproductive performance, especially by incorporating the apparent behavioral plasticity of nestlings.
  note: by Andrew McInnes.
  note: "Major Subject: Marine Resources Management"
  note: Electronic resource.
  note: Master of Marine Resources Management Texas A&M University 2011 http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10349
  note: Includes bibliographical references.
  note: Text (Thesis)
  subject:
    topic: Major Marine Resources Management
  subject:
    topic: Reproductive Performance
  subject:
    topic: Great Egret
  subject:
    topic: Productivity
  subject:
    topic: Hatching Spread
  subject:
    topic: Fledging Success
  identifier: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10349
  record info:
    record content source: TXA
    record creation date: 121016
    record change date: 20150922124247.0
    record identifier: in00002763347