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Titolo:
Use of Chlorella vulgaris as a carotenoid source for rainbow trout: effectof dietary lipid content on pigmentation, digestibility and retention in the muscle tissue
Autore:
Gouveia, L; Choubert, G; Gomes, E; Rema, P; Empis, J;
Indirizzi:
InstlSuper Tecn, Seccao Biotecnol, Engn Bioquim Lab, P-1096 Lisbon, Portuga Inst Super Tecn Lisbon Portugal P-1096 oquim Lab, P-1096 Lisbon, Portuga Univ Tras Os Montes & Alto Douro, Vila Real, Portugal Univ Tras Os Montes & Alto Douro Vila Real Portugal Vila Real, Portugal Univ Porto, Inst Ciencias Biomed, P-4000 Porto, Portugal Univ Porto Porto Portugal P-4000 Ciencias Biomed, P-4000 Porto, Portugal INRA,FranceER, Unite Mixte, Lab Nutr Poissons, F-64310 St Pee sur Nivelle,INRA St Pee sur Nivelle France F-64310 sons, F-64310 St Pee sur Nivelle, INETI, P-1699 Lisbon, Portugal INETI Lisbon Portugal P-1699INETI, P-1699 Lisbon, Portugal
Titolo Testata:
AQUACULTURE INTERNATIONAL
fascicolo: 4, volume: 6, anno: 1998,
pagine: 269 - 279
SICI:
0967-6120(199808)6:4<269:UOCVAA>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
ALGA HAEMATOCOCCUS-PLUVIALIS; SALMO-GAIRDNERI RICH; ONCORHYNCHUS-MYKISS; FRESH-WATER; CANTHAXANTHIN; ASTAXANTHIN; DEPOSITION; SALTWATER; FLESH;
Keywords:
carotenoids; Chlorella vulgaris; digestibility; pigmentation; rainbow trout (Oncorhynchus mykiss);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Empis, J Inst6Super Tecn, Seccao Biotecnol, Engn Bioquim Lab, Av Rovisco Pais, P-109 Inst Super Tecn Av Rovisco Pais Lisbon Portugal P-1096 is, P-109
Citazione:
L. Gouveia et al., "Use of Chlorella vulgaris as a carotenoid source for rainbow trout: effectof dietary lipid content on pigmentation, digestibility and retention in the muscle tissue", AQUACUL INT, 6(4), 1998, pp. 269-279

Abstract

Apparent digestibility, deposition and retention of carotenoids in the muscle of rainbow trout, Oncorhynchus mykiss, were investigated comparing the feeding of pigments from Chlorella vulgaris against commercially available pigments at two different total lipid contents (15% and 20% lipid). Algal biomass (ALG) was included in rainbow trout diets and muscle pigmentation was compared to that obtained in trout fed diets containing a 5:3 mixture of canthaxanthin and astaxanthin (MIX) (reflecting the relative concentrationsof these carotenoids in the dry alga) or those fed a diet containing astaxanthin only (AST). Apparent digestibilities of pigments and nutrients were determined by the indirect method, using Cr2O3 as indicator, and the colourintensity and pigment concentration were assessed in the muscle, using theRoche colour card for salmonids and W-vis spectrophotometry. After 6 weeksfeeding, colour intensity was similar for the various pigment sources, achieving levels 12 to 13, yet significantly higher in fish fed the diet with the higher lipid content (approximate to 20%) p<0.05). Pigment concentration in the muscle was also higher in the fish fed the high-fat diet. Muscle pigment concentrations were similar for fish fed diets ALG and MIX, and over1.5 times higher than for diet AST (p < 0.05) after 6 weeks. Apparent digestibility of dry matter, crude protein, lipid, total energy and specific carotenoid concentrations were also measured. Increased dietary fat content was shown to increase the deposition and the retention of carotenoids in muscle, and the difference increased with time (deposition increase of 10-20% at week 3 and 30-40% at week 6 and retention increase of 10-15% at week 3 and 30% at week 6). Pigment digestibility also apparently increases (10-20%)under those conditions despite the fact that no significant effects in terms of apparent digestibility increase were found for dry matter, protein, lipids or energy.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 14:33:06