Title page for etd-0707104-164419


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URN etd-0707104-164419
Author Hung-tzu Fang
Author's Email Address No Public.
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Department Marine Environment and Engineering
Year 2003
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Concentrations and characteristics of PCB congeners in the aquaculture oysters (Crassostrea gigas) along west coast, Taiwan
Date of Defense 2004-06-19
Page Count 88
Keyword
  • polychlorinated biphenyls
  • oyster
  • congeners
  • Abstract This study investigates the concentrations and characteristics of PCB
    congeners in aquaculture oysters (Crassostrea gigas) along the western
    coast of Taiwan. Oyster samples were collected from 5 aquacultural areas,
    Hsinchu, Changhua, Yunlin, Chiayi and Tainan, during May 2003 and
    March 2004.
    The results showed that the total PCB concentrations in the oysters
    were between 3.43 and 93.3 ng/g dry weight, and the median
    concentration was 20.3 ng/g dry weight. The highest concentrations were
    found in the oysters collected from Luermen (Tainan) (74.7~93.3 ng/g).
    Samples from other two stations of Tainan aquacultural area, Cigu and
    Anping, were also found relative high total PCB concentrations
    (46.5~72.0 ng/g) than the rest area. This indicates a local pollution source
    should be blamed on. Except the above areas, the total PCB
    concentrations were found evenly distributed throughout the coast
    (3.43~41.2 ng/g with a median concentration of 14.9 ng/g).
    The PCB concentrations were not significantly correlated with lipid
    contents and shell lengths. Therefore, the variation of PCB concentrations
    in all stations might be dependent on the presence of localized sources of
    contamination rather than on the lipid content and shell length variation
    of oysters.
    In some observed stations, the PCB concentrations of oysters in
    autumn are significantly higher than in summer. That is because the
    adoptive tide in winter will lead to the tendency to reduce PCB
    concentrations of oysters.
    Advisory Committee
  • none - chair
  • none - co-chair
  • none - co-chair
  • none - advisor
  • Files
  • etd-0707104-164419.pdf
  • indicate in-campus access immediately and off_campus access in a year
    Date of Submission 2004-07-07

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