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Carotenoids in diets for salmonids: I. Pigmentation of rainbow trout with the individual optical isomers of astaxanthin in comparison with canthaxanthin
Ist Teil von
Aquaculture, 1984-10, Vol.41 (3), p.213-226
Ort / Verlag
Amsterdam: Elsevier B.V
Erscheinungsjahr
1984
Quelle
Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)
Beschreibungen/Notizen
Visual and chemical determinations revealed that the individual optical isomers of astaxanthin were more efficacious than canthaxanthin in pigmenting the flesh of rainbow trout (
Salmo gairdneri, Richardson). The visual assessment of the astaxanthin pigmentation by means of a colour scale correlated well with the chemical determination. The same utilization was found for all three astaxanthin isomers, (
3S, 3′S)-, (
3R, 3′S)-, (
3R, 3′R)-astaxanthin and a 1 : 2 : 1 mixture of the three isomers.
No epimerization took place at the chiral centres of C-3 and C-3′ in astaxanthin. Astaxanthin and canthaxanthin were not interconverted. No metabolites were detected in the flesh.