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Stability of fatty acid composition in seal blubber during long-term storage
Swedish Museum of Natural History, Department of.
Swedish Museum of Natural History, Department of.
University of Agricultural Sciences.
Dalhousie University.
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2012 (English)In: Marine Ecology Progress Series, ISSN 0171-8630, Vol. 461, 283-291 p.Article in journal (Refereed) Published
Abstract [en]

This study was performed to evaluate the stability of the fatty acid (FA) composition of blubber from Baltic grey seals Halichoerus grypus archived at −25°C in the Swedish Environmental Specimen Bank (SESB). Possible alterations of FA compositions with storage time and temperature were evaluated. Blubber from 5 seals was kept at +2°C and at −20°C and sampled for up to 6 mo and 33 mo, respectively. Furthermore, FA profile stability was evaluated in blubber stored in the SESB for 4 and 6 yr. This was done by re-sampling and re-analyzing blubber samples from SESB. In both parts of the study, a principal component analysis was performed on 48 FAs comprising 98 to 99% of the total FAs in blubber of Baltic grey seals. We found no indication of a critically altered FA composition, neither in blubber stored at +2°C for 6 mo nor in blubber stored at −20°C for 33 mo. The re-analysis of samples stored in SESB for ~4 to 6 yr only differed for a few FAs in some samples. The most remarkable differences were a slight increase in some long-chain unsaturated FAs (18:2n-6, 20:3n-3, 20:4n-3, 22:4n-3). As an increase in long-chain polyunsaturated FAs due to storage is highly unlikely, we believe that this is probably more due to the sampling technique than to a critically altered FA composition due to storage. Our results suggest that archived seal blubber may be safely used in retrospective analyses of diet using an FA signature analysis technique.

Place, publisher, year, edition, pages
2012. Vol. 461, 283-291 p.
Keyword [en]
Fatty acid composition · Long-term storage · Blubber · Grey seal · Baltic Sea
National Category
Biological Sciences
Research subject
Man and the environment
Identifiers
URN: urn:nbn:se:nrm:diva-353DOI: 10.3354/meps09769OAI: oai:DiVA.org:nrm-353DiVA: diva2:723706
Available from: 2014-06-11 Created: 2014-06-11 Last updated: 2014-06-12Bibliographically approved

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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