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Fate of Chlorinated Fatty Acids in Migrating Sockeye Salmon and Their Transfer to Arctic Grayling

Mu, Huiling; Ewald, Göran LU ; Nilsson, Einar LU ; Sundin, Peter and Wesén, Clas LU (2004) In Environmental Science & Technology 38(21). p.5548-5554
Abstract
To investigate whether biotransport constitutes an entry route into pristine ecosystems for nonpersistent, nonvolatile xenobiotic compounds, extractable organically bound halogen in sockeye salmon (Oncorhynchus nerka) from Alaska was determined before and after spawning migration. The major organohalogen compounds in the salmon were halogenated fatty acids, predominantly chlorinated species that accounted for up to 35% of the extractable, organically bound chlorine (EOCl) in the fish tissues. The amount of chlorinated fatty acids in the salmon muscle decreased as a result of spawning migration. The decrease was correlated with that of triacylglycerols in the salmon muscle, indicating the chlorinated fatty acids to be mobilized and... (More)
To investigate whether biotransport constitutes an entry route into pristine ecosystems for nonpersistent, nonvolatile xenobiotic compounds, extractable organically bound halogen in sockeye salmon (Oncorhynchus nerka) from Alaska was determined before and after spawning migration. The major organohalogen compounds in the salmon were halogenated fatty acids, predominantly chlorinated species that accounted for up to 35% of the extractable, organically bound chlorine (EOCl) in the fish tissues. The amount of chlorinated fatty acids in the salmon muscle decreased as a result of spawning migration. The decrease was correlated with that of triacylglycerols in the salmon muscle, indicating the chlorinated fatty acids to be mobilized and metabolized to approximately the same extent as the other fatty acids. Chlorinated fatty acids were also transferred to the maturing roe in a manner similar to that of the unchlorinated fatty acids. Lipids of the Arctic grayling (Thymallus arcticus), a fish resident to the spawning lake of the salmon, contained higher concentrations of chlorinated fatty acids than grayling in a lake without migratory salmon. This may reflect a food-chain transfer of the chlorinated fatty acids originating from the salmon, demonstrating a long-range transport route for this type of pollutants to pristine areas. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Environmental Science & Technology
volume
38
issue
21
pages
5548 - 5554
publisher
The American Chemical Society
external identifiers
  • wos:000224793600018
  • pmid:15575271
  • scopus:7444240310
ISSN
1520-5851
DOI
10.1021/es048744q
language
English
LU publication?
yes
id
232e5baa-2190-4c78-96e9-5d10009bfe1a (old id 141325)
date added to LUP
2007-06-27 12:58:51
date last changed
2017-01-01 07:10:53
@article{232e5baa-2190-4c78-96e9-5d10009bfe1a,
  abstract     = {To investigate whether biotransport constitutes an entry route into pristine ecosystems for nonpersistent, nonvolatile xenobiotic compounds, extractable organically bound halogen in sockeye salmon (Oncorhynchus nerka) from Alaska was determined before and after spawning migration. The major organohalogen compounds in the salmon were halogenated fatty acids, predominantly chlorinated species that accounted for up to 35% of the extractable, organically bound chlorine (EOCl) in the fish tissues. The amount of chlorinated fatty acids in the salmon muscle decreased as a result of spawning migration. The decrease was correlated with that of triacylglycerols in the salmon muscle, indicating the chlorinated fatty acids to be mobilized and metabolized to approximately the same extent as the other fatty acids. Chlorinated fatty acids were also transferred to the maturing roe in a manner similar to that of the unchlorinated fatty acids. Lipids of the Arctic grayling (Thymallus arcticus), a fish resident to the spawning lake of the salmon, contained higher concentrations of chlorinated fatty acids than grayling in a lake without migratory salmon. This may reflect a food-chain transfer of the chlorinated fatty acids originating from the salmon, demonstrating a long-range transport route for this type of pollutants to pristine areas.},
  author       = {Mu, Huiling and Ewald, Göran and Nilsson, Einar and Sundin, Peter and Wesén, Clas},
  issn         = {1520-5851},
  language     = {eng},
  number       = {21},
  pages        = {5548--5554},
  publisher    = {The American Chemical Society},
  series       = {Environmental Science & Technology},
  title        = {Fate of Chlorinated Fatty Acids in Migrating Sockeye Salmon and Their Transfer to Arctic Grayling},
  url          = {http://dx.doi.org/10.1021/es048744q},
  volume       = {38},
  year         = {2004},
}