Aquaculture International

, Volume 3, Issue 3, pp 205–216 | Cite as

Utilization of carotenoids from various sources by rainbow trout: muscle colour, carotenoid digestibility and retention

  • Georges Choubert
  • José-Carlos G. Milicua
  • Ramon Gomez
  • Sophie Sancé
  • Hélène Petit
  • Geneviève Nègre-Sadargues
  • René Castillo
  • Jean-Paul Trilles

Rainbow trout (Oncorhynchus mykiss) with a mean (sd) weight of 120 (2) g were fed diets supplemented with astaxanthin extracted from the yeast Phaffia rhodozyma (OY1 = 50 mg carotenoids kg−1 feed, OY2 = 100 mg carotenoids kg−1 feed), astaxanthin (AX = 100 mg astaxanthin kg−1 feed) and canthaxanthin (CX = 100 mg canthaxanthin kg−1 feed) for 4 weeks. Muscle analyses at the end of the experiment indicated a significantly higher carotenoid concentration in the AX group, while CX and OY1 groups were similar in spite of the differences in dietary concentration. The measure of total muscle colour difference (ΔE*ab) between initial samples and 4 week ones was higher for the AX fish group but showed no significant difference between OY1, OY2, and CX. The hue and the reflectance ratio (R650:R510) of fish muscle increased in proportion to carotenoid intake. Digestibility (ADC) of yeast astaxanthin in OY1 and OY2 groups was significantly higher than that in the AX group. Canthaxanthin ADC was about one sixth of that of astaxanthin (AX group). Carotenoid retention in the muscle, expressed as a percentage of carotenoid intake, was higher for the AX group than that recorded for OY1 and OY2. According to ADC, carotenoid retention showed a marked lower value for the CX group. Muscle retentions were similar for astaxanthins from both sources.


Astaxanthin Canthaxanthin Carotenoids Colour Digestibility Rainbow trout (Oncorhynchus mykissRetention Yeast (Phaffia rhodozyma


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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • Georges Choubert
    • 1
  • José-Carlos G. Milicua
    • 2
  • Ramon Gomez
    • 3
  • Sophie Sancé
    • 4
  • Hélène Petit
    • 4
  • Geneviève Nègre-Sadargues
    • 4
  • René Castillo
    • 4
  • Jean-Paul Trilles
    • 4
  1. 1.Unité mixte INRA/IFREMERLaboratoire de Nutrition des Poissons, Station d'HydrobiologieSaint-Pée-sur-NivelleFrance
  2. 2.Departamento de Bioquimica, Facultad de CienciasUniversidad del Pais VascoBilbaoSpain
  3. 3.Departamento de Technologia de los Alimentos, Facultad de FarmaciaUniversidad del Pais VascoVitoriaSpain
  4. 4.Laboratoire d'Ecophysiologie des Invertébrés, Université de Montpellier II, Sciences et Techniques du Languedoc, Place Eugène BataillonMontpellier Cedex 5France

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