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.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0707104-164419 |
| Date | 07 July 2004 |
| Creators | Fang, Hung-tzu |
| Contributors | none, none, none, none |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0707104-164419 |
| Rights | off_campus_withheld, Copyright information available at source archive |
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