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Titolo:
EFFECT OF A DIETARY PHOSPHOLIPID SUPPLEMENTATION ON GROWTH AND FATTY-ACID COMPOSITION OF EUROPEAN SEA BASS (DICENTRARCHUS-LABRAX L) AND TURBOT (SCOPHTHALMUS-MAXIMUS L) JUVENILES FROM WEANING ONWARDS
Autore:
GEURDEN I; COUTTEAU P; SORGELOOS P;
Indirizzi:
STATE UNIV GHENT,AQUACULTURE LAB,ROZIER 44 B-9000 GHENT BELGIUM STATE UNIV GHENT,ARTEMIA REFERENCE CTR B-9000 GHENT BELGIUM
Titolo Testata:
Fish physiology and biochemistry
fascicolo: 4, volume: 16, anno: 1997,
pagine: 259 - 272
SICI:
0920-1742(1997)16:4<259:EOADPS>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
STANDARD EXPERIMENTAL DIET; FIRST ONGROWING STAGES; DOCOSAHEXAENOIC ACID; DIGESTIVE ENZYMES; SPARUS-AURATA; LIVE FOOD; LARVAE; SURVIVAL; LIPIDS; BRAIN;
Keywords:
PHOSPHOLIPIDS; ESSENTIAL FATTY ACIDS; WEANING; MARINE FISH; EUROPEAN SEA BASS; DICENTRARCHUS LABRAX; TURBOT; SCOPHTHALMUS MAXIMUS;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
I. Geurden et al., "EFFECT OF A DIETARY PHOSPHOLIPID SUPPLEMENTATION ON GROWTH AND FATTY-ACID COMPOSITION OF EUROPEAN SEA BASS (DICENTRARCHUS-LABRAX L) AND TURBOT (SCOPHTHALMUS-MAXIMUS L) JUVENILES FROM WEANING ONWARDS", Fish physiology and biochemistry, 16(4), 1997, pp. 259-272

Abstract

Two 40-day feeding trials using extruded diets were conducted to assess the effect of a dietary phospholipid (PL) supplementation on growth, survival and fatty acid composition of European sea bass (Dicentrarchus labrax) and turbot (Scophthalmus maximus) from weaning onwards. Two dietary treatments (FO and PL) were tested; both had an identical extruded basis (92.5% total diet weight) coated with a different lipid fraction (7.5% total diet weight). Diet PL contained 2% egg yolk PL (69% pure). In diet FO the PL was replaced by hydrogenated coconut oil. The isolipidic diets contained an equal amount of fish oil ethyl estersproviding 1.6% (% diet dry weight) of n-3 highly unsaturated fatty acids (HUFA). A diet water stability test showed no effect of the PL supplementation on the leaching of the dietary fatty acids. In both fish species weight, but not survival, significantly increased as a result of PL supplementation. Weaning onto the experimental diets resulted insimilar changes in the relative percent levels of fatty acids in bothspecies. In general, the percentage of saturated fatty acids levelledoff after a rapid increase, while monoenes increased after an initialdecrease. Total n-3 polyunsaturated fatty acids (PUFA) decreased and total n-6 PUFA remained almost constant. The major effect of the dietary PL on fish fatty acid composition was a 50% increase in n-6 and n-3HUFAs compared to the PL-free FO diet. The rise in n-6 HUFA may have reflected the higher moiety in the dietary FL. On the other hand this was not the case for the n-3 HUFA since they represented only low levels In the PL fraction (0.1%) compared to that provided by the ethyl esters (1.6%) suggesting a more efficient incorporation of the PL n-3 HUFA than of the ethyl ester n-3 HUFA. A second hypothesis is that the dietary PL may have favored the incorporation of the dietary ethyl ester n-3 HUFA.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 08:20:02