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: Occurrence, behavior and genetic diversity of bowhead whales in the Western Sea of Okhotsk, Russia
  name:
    name part: MacLean, Stephen Ahgeak.
    role:
      role term: creator
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: xx
    date issued: 2002
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    form: remote
    extent: xi, 114 leaves : illustrations, maps ; 28 cm.
  abstract: The Okhotsk Sea (OS) stock of bowhead whales was severely reduced by commercial whaling in the late 19th century and again by illegal Soviet pelagic whaling in the 1960s. Estimates of the population prior to exploitation range from 3,000 to 6,000. A crude estimate of the population in the 1980s was 100-300. Two seasons were spent in field camp near Cape Ukurunru in the Shantar Archipelago in the northwestern Sea of Okhotsk to begin to define summer habitat use, behavior, and genetic diversity of the OS bowheads. Bowheads were seen in both Ulbanskiy and Konstantina Bays, with more whale groups seen in Ulbanskiy Bay. Bowhead groups appeared to be concentrated around Cape Ukurunru. Whale groups were seen at an equal rate in August and September. Underwater feeding behavior was observed most frequently. Genetic diversity of the OS stock was compared to the Bering-Chukchi-Beaufort Seas (BCBS) stock with mitochondrial DNA sequences and nine nuclear DNA microsatellite loci. Individuals identified by mitochondrial haplotype, sex, and nuclear DNA microsatellite genotypes were used in a mark-recapture estimate of population size. Sixty seven individuals were identified from the OS stock, resulting in an estimate of 566 with variance from 67 to 189,000. A minimum population estimate with 95% confidence is 247. Seven mitochondrial DNA haplotypes were identified from the OS stock. The OS stock was significantly different from the BCBS population with both an exact test of population differentiation and an AMOVA. A nested clade analysis of haplotype frequency and geographic distribution of haplotypes with the OS and BCBS populations suggested reduced gene flow with segregation by geographic distance and contiguous range expansion between the OS and BCBS at low-level clades, but was unable to differentiate the populations at high-level clades. These results suggest that the OS and BCBS stocks share common ancestry, and have mixed repeatedly throughout the evolution of bowheads in …
  note: by Stephen Ahgeak MacLean.
  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 2002
  note: Includes bibliographical references (leaves 99-110).
  subject:
    topic: Major wildlife and fisheries sciences
  identifier: https://hdl.handle.net/1969.1/ETD-TAMU-2002-THESIS-M33
  related item:
    location:
      url: https://hdl.handle.net/1969.1/ETD-TAMU-2002-THESIS-M33
  record info:
    record content source: TXA
    record creation date: 030123
    record change date: 20220103134557.0
    record identifier: in00001725241