Levels of C10-C13 Polychloro-n-Alkanes in Marine Mammals from the Arctic and the St. Lawrence River Estuary
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- 作者：Gregg T. Tomy ; Derek C. G. Muir ; Gary A. Stern ; and John B. Westmore
- 刊名：Environmental Science & Technology
- 出版年：2000
- 出版时间：May 1, 2000
- 年：2000
- 卷：34
- 期：9
- 页码：1615 - 1619
- 全文大小：85K
- 年卷期：v.34,no.9(May 1, 2000)
- ISSN：1520-5851
文摘
Marine mammals from various regions of the Arctic andthe St. Lawrence River estuary were examined for the firsttime for levels of CB>10-C13 polychloro-n-alkanes (sPCAs).Respective mean total sPCA concentrations in the blubberof beluga whales (Delphinapterus leucas) from Saqqaqand Nuussuaq, western Greenland, were 0.23 ± 0.02 (n =2) and 0.164 ± 0.06 
g/g (n = 2), similar to that inbeluga from the Mackenzie Delta in the western CanadianArctic 0.21 ± 0.08 g/g (n = 3). sPCAs levels werehigher in beluga blubber from the St. Lawrence River(0.37 to 1.4 g/g). Mean sPCA concentrations in the blubbersamples from walruses (Odobenus rosmarus) (Thule,northwest Greenland) and ringed seal (Phoca hispida)(Eureka, southwest Ellesmere Island) were 0.43 ± 0.06 (n= 2) and 0.53 ± 0.2 g/g (n = 6), respectively. Relative tocommercial sPCA formulations, samples from the Arcticmarine mammals showed a predominance of the shorterchain length lower percent chlorinated PCA congeners, themore volatile components of industrial formulations. Thisobservation is consistent with long-range atmospherictransport of sPCAs to this region. The profiles of the belugasfrom the St. Lawrence River estuary, however, hadhigher proportions of the less volatile sPCA congeners,implying that contamination to this region is probably fromlocal sources.
g/g (n = 2), similar to that inbeluga from the Mackenzie Delta in the western CanadianArctic 0.21 ± 0.08 g/g (n = 3). sPCAs levels werehigher in beluga blubber from the St. Lawrence River(0.37 to 1.4 g/g). Mean sPCA concentrations in the blubbersamples from walruses (Odobenus rosmarus) (Thule,northwest Greenland) and ringed seal (Phoca hispida)(Eureka, southwest Ellesmere Island) were 0.43 ± 0.06 (n= 2) and 0.53 ± 0.2 g/g (n = 6), respectively. Relative tocommercial sPCA formulations, samples from the Arcticmarine mammals showed a predominance of the shorterchain length lower percent chlorinated PCA congeners, themore volatile components of industrial formulations. Thisobservation is consistent with long-range atmospherictransport of sPCAs to this region. The profiles of the belugasfrom the St. Lawrence River estuary, however, hadhigher proportions of the less volatile sPCA congeners,implying that contamination to this region is probably fromlocal sources.