Document Detail

Development of rancidity in salmonoid steaks during retail display. A comparison of practical storage life of wild salmon and farmed rainbow trout.
MedLine Citation:
PMID:  2220079     Owner:  NLM     Status:  MEDLINE    
The quality of wild salmon and farmed rainbow trout from aquaculture, both packed in transparent vacuum-skin packaging, was followed during storage for 6 months in an illuminated freezer cabinet (product temperature -17 degrees C, half of the packs protected against light, and half of the packs fully exposed to light), combining (a) colour determination of the carotenoid-pigment flesh by tristimulus colorimetry, (b) determination of thiobarbituric-acid-reactive substances (TBA value), (c) carotenoid analysis and, at the end of the storage experiment, (d) sensory evaluation. Rancidity developed faster in steaks of wild salmon (TBA increased during 6 months of storage from 2.8 mumols malonaldehyde/kg flesh to 12.5 mumols/kg for light-protected packages, and to 17.6 mumols/kg for packages exposed to fluorescent light) as compared to steaks of farmed rainbow trout (TBA increased from 1.2 to 5.8 mumols/kg, independent of light exposure), a finding also confirmed by sensory evaluation. In both products, the carotenoid pigment was identified as astaxanthin; salmon steaks, the product more susceptible to developing rancidity, had the lower astaxanthin content (rainbow trout 9.1 mg/kg flesh, salmon 4.9 mg/kg, prior to storage). While the astaxanthin content remained virtually constant in salmon steaks during storage, the content decreased significantly in steaks of rainbow trout, an observation which suggests the role of astaxanthin as a sacrificial protector against radical processes.
H J Andersen; G Bertelsen; A G Christophersen; A Ohlen; L H Skibsted
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Zeitschrift für Lebensmittel-Untersuchung und -Forschung     Volume:  191     ISSN:  0044-3026     ISO Abbreviation:  Z Lebensm Unters Forsch     Publication Date:  1990 Aug 
Date Detail:
Created Date:  1990-11-07     Completed Date:  1990-11-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7509812     Medline TA:  Z Lebensm Unters Forsch     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  119-22     Citation Subset:  IM    
Department of Dairy and Food Sciences, Royal Veterinary and Agricultural University, Frederiksberg, Denmark.
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MeSH Terms
Carotenoids / analysis
Chromatography, High Pressure Liquid
Food Analysis
Food Preservation*
beta Carotene* / analogs & derivatives*
Reg. No./Substance:
0/Xanthophylls; 36-88-4/Carotenoids; 472-61-7/astaxanthine; 7235-40-7/beta Carotene

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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