Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/2798
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dc.contributor.authorMourente, Gabriel-
dc.contributor.authorDiaz, Esther-
dc.contributor.authorTocher, Douglas R-
dc.contributor.authorBell, J Gordon-
dc.date.accessioned2013-10-07T23:50:40Z-
dc.date.available2013-10-07T23:50:40Z-
dc.date.issued2000-11-
dc.identifier.urihttp://hdl.handle.net/1893/2798-
dc.description.abstractLipid peroxidation, specifically polyunsaturated fatty acid (PUFA) oxidation is highly deleterious, resulting in damage to cellular biomembranes, and may be a principal cause of several diseases in fish including jaundice and nutritional muscular dystrophy. Tissue lipid PUFA content and composition are critical factors in lipid peroxidation, as is the level of endogenous antioxidant molecules such as vitamin E. The primary objective of the present study was the characterization of antioxidant systems in a cultured juvenile marine fish, gilthead sea bream (Sparus aurata) with the underlying aim to understand how to avoid oxidation problems that may cause pathologies and disease and so to enhance growth and quality of early ongrowing stages. Juvenile sea bream were fed diets having either high or low levels of fish oil and supplemented or basal levels of vitamin E with PUFA/vitamin E ratios ranging from 117 ± 12 in the diet with low PUFA supplemented with vitamin E to 745 ± 48 in the diet with high PUFA with no additional vitamin E. None of the diets had serious deliterious effects on growth or survival of the fish, but the different dietary regimes were effective in significantly altering the PUFA/vitamin E ratios in the fish livers with values ranging from 5.7 ± 0.4 in fish fed the diet with low PUFA supplemented with vitamin E to 91.1 ± 13.2 in fish fed the diet with high PUFA with no additional vitamin E. This had effects on the peroxidation status of the fish as indicated by the significantly altered levels of in vivo lipid peroxidation products measured in liver, with fish fed the diet rich in PUFA and low in vitamin E showing significantly higher values of thiobarbituric acid reactive substances (TBARS) and isoprostanes. The isoprostane levels generally followed the same pattern as the TBARS levels supporting its value as an indicator of in vivo oxidative stress in fish, as it is in mammals. However, few significant effects on antioxidant enzyme activities were observed suggesting that more severe conditions may be required to affect these activities such as increasing the PUFA/vitamin E ratio or by increasing peroxidative stress through the feeding of oxidized oils.en_UK
dc.language.isoen-
dc.publisherSpringer-
dc.relationMourente G, Diaz E, Tocher DR & Bell JG (2000) Effects of dietary polyunsaturated fatty acid/vitamin E (PUFA/tocopherol) ratio on antioxidant defence mechanisms of juvenile gilthead sea bream (Sparus aurata L., Osteichthyes, Sparidae), Fish Physiology and Biochemistry, 23 (4), pp. 337-351.-
dc.rightsPublished in Fish Physiology and Biochemistry by Springer.; The original publication is available at www.springerlink.com-
dc.subjectGilthead seabreamen_UK
dc.subjectSparus aurataen_UK
dc.subjectFish oilen_UK
dc.subjectOxidised oilen_UK
dc.subjectPolyunsaturated fatty acidsen_UK
dc.subjectVitamin Een_UK
dc.subjectAlpha-tocopherolen_UK
dc.subjectPUFA/Vitamin E Ratioen_UK
dc.subjectLipid peroxidationen_UK
dc.subjectAntioxidant defence enzymesen_UK
dc.subjectMDAen_UK
dc.subjectIsoprostanesen_UK
dc.subject.lcshFishes Nutrition Requirements-
dc.subject.lcshFood analysis-
dc.subject.lcshFishes Feeding and feeds-
dc.subject.lcshFishes Nutrition Requirments-
dc.titleEffects of dietary polyunsaturated fatty acid/vitamin E (PUFA/tocopherol) ratio on antioxidant defence mechanisms of juvenile gilthead sea bream (Sparus aurata L., Osteichthyes, Sparidae)en_UK
dc.typeJournal Articleen_UK
dc.identifier.doihttp://dx.doi.org/10.1023/A:1011128510062-
dc.citation.jtitleFish Physiology and Biochemistry-
dc.citation.issn0920-1742-
dc.citation.volume23-
dc.citation.issue4-
dc.citation.spage337-
dc.citation.epage351-
dc.citation.publicationstatusPublished-
dc.citation.peerreviewedRefereed-
dc.type.statusPost-print (author final draft post-refereeing)-
dc.identifier.urlhttp://www.springerlink.com/content/0920-1742/-
dc.author.emaildrt1@stir.ac.uk-
dc.contributor.affiliationUniversity of Cadiz-
dc.contributor.affiliationUniversity of Cadiz-
dc.contributor.affiliationAquaculture-
dc.contributor.affiliationAquaculture-
dc.identifier.isi000167924500007-
Appears in Collections:Aquaculture Journal Articles

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