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Nutritional quality and shelf-life of frozen bream (sparus aurata) from different farming systems.
Author(s) : ORBAN E., PIZZOFERRATO L., NICOLI S., CASINI I., CAPRONI R.
Summary
The aim of the study was to compare the chemical composition, the fatty acid profile and the unsaponifiable fraction, particularly alpha-tocopherol, and to study the effects of cold storage at -18 and -30 deg C on frozen bream fillets from intensive and extensive farming systems. The results on chemical composition showed that the total lipid content and monounsaturated fatty acid content were higher in samples from intensive farms, whereas the total polyunsaturated content of fillets from extensively farmed bream was higher than in fillets from intensively farmed bream (+ 22%). Differences in linoleic, arachidonic and eicosapentaenoic acids were observed. The unsaponifiable fraction brought out differences mainly in alpha-tocopherol content, which was higher in fillets from extensive farms. As regards the effects of cold storage, the samples from intensive farms had higher TBA values than those from extensive farms. As compared to the fatty acid composition of fresh fillets after six months, the docosahexaenoic acid decreased by 40% in the fillets from both types of farms. The extractability of the myofibrillar proteins (parameter of their denaturation), showed a general reduction during storage which was greater in fillets stored at -18 deg C than in these stored at -30 deg C.
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Details
- Original title: Nutritional quality and shelf-life of frozen bream (sparus aurata) from different farming systems.
- Record ID : 1997-1675
- Languages: English
- Source: Refrigeration and Aquaculture.
- Publication date: 1996/03/20
- Document available for consultation in the library of the IIR headquarters only.
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Indexing
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Themes:
Food quality and safety. Microbiology;
Fish and fish product - Keywords: Aquaculture; Nutritional value; Fish; Sea bream; Freezing; Storage life
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