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: Ecological correlates of Harris' hawk grouping in southern Texas
  name:
    name part: Appelt, Christopher Warren.
    role:
      role term: creator
  name:
    name part: Packard, Jane M.
    role:
      role term: degree supervisor.
  name:
    name part: De Young, Charles A.
    role:
      role term: degree supervisor.
  name:
    name part: Chavez-Ramirez, Felipe
    role:
      role term: degree comittee member.
  name:
    name part: Wu, X. Ben
    role:
      role term: degree comittee 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: 2002
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xi, 121 leaves : illustrations ; 29 cm
  abstract: I surveyed Harris' hawk (Parabuteo unicinctus) grouping relative to rainfall and landscape patterns at eight southern Texas study sites during the fall non-breeding season. Objectives were to: I) determine relationships among landscape use, grouping and abundance across sites, 2) characterize variation in grouping associated with rainfall patterns in the brushland and grassland ecoregions of the study area, and 3) explore which landscape measures best explained within site variation in grouping, considering 3 spatial scales (mesohabitat, territory, home range). Although abundance was higher (17.1 ± 4.1 hawks/100km) than reported for more arid regions, observations of groups (>2 hawks) varied across sites (0.113 ± 0.037 groups/observation). Groups were not observed at 3 of 4 sites in the wetter, eastern grassland, where abundance was slightly lower than brushland. One grassland site with abundant hawks and groups was a drier, habitat fragment in a landscape devoid o f woody vegetation. Abundance correlated with grouping but not with the landscape variables measured. However, hawks were typically found in areas with less fragmented woody vegetation. Vegetation strata differed between random points and hawk locations at 5 sites, four of which had groups, but differences could not be generalized across sites. Sightings of 3 hawks were more likely to be at brushland than grassland locations (z = 2.34, p < 0.05). Larger groups (4-5 hawks) and groups with young-of-the-year were sighted infrequently with no differences between ecoregions. Two indices of grouping were significantly negatively correlated with rainfall recorded near each site in the same year, but not with indices o f rainfall during the previous year. Only subtle differences in landscape vegetation were found between areas around grouped and non-grouped Harris' hawk locations. I compared vegetation patterns at three ecologically appropriate scales. The greatest differences were observed at the finest scale (s…
  note: Major subject: Wildlife science.
  note: Vita.
  note: Ph. D. Texas A & M University-Kingsville and Texas A & M University 2002
  note: Includes bibliographical references.
  subject:
    geographic code: n-us-tx
  subject:
    topic: Harris's hawk
    topic: Ecology
    geographic: Texas, South
  subject:
    topic: Major wildlife science
  classification: AS36.T3 Appel
  identifier: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  record info:
    record content source: TAI
    record creation date: 021021
    record change date: 20200904152734.0
    record identifier: in00001702656
    language of cataloging:
      language term: eng