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Carotenoid Pigments in Goldfish-IV

Masahiro Hata, Mitsuo Hata

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Abstract

1) Zeaxanthin and β-carotene were metabolized to astaxanthin. Zeaxanthin was metabolized easily, but β-carotene was metabolized very slightly. Echinenone and canthaxanthin were not metabolized distinctly to astaxanthin. Lutein was metabolized to 4-ketolutein but not to astaxanthin. 2) The rates of accumulation and absorption of carotenoids differed. OH groups and α-structure increased the absorption but carbonyl group decreased it. 3) The hepatopancreas did not accumulate all given carotenoids.

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1) Zeaxanthin and β-carotene were metabolized to astaxanthin. Zeaxanthin was metabolized easily, but β-carotene was metabolized very slightly. Echinenone and canthaxanthin were not metabolized distinctly to astaxanthin. Lutein was metabolized to 4-ketolutein but not to astaxanthin. 2) The rates of accumulation and absorption of carotenoids differed. OH groups and α-structure increased the absorption but carbonyl group decreased it. 3) The hepatopancreas did not accumulate all given carotenoids.

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Available abstract

1) Zeaxanthin and β-carotene were metabolized to astaxanthin. Zeaxanthin was metabolized easily, but β-carotene was metabolized very slightly. Echinenone and canthaxanthin were not metabolized distinctly to astaxanthin. Lutein was metabolized to 4-ketolutein but not to astaxanthin. 2) The rates of accumulation and absorption of carotenoids differed. OH groups and α-structure increased the absorption but carbonyl group decreased it. 3) The hepatopancreas did not accumulate all given carotenoids.

Key concepts: Astaxanthin, Canthaxanthin, Zeaxanthin, Carotenoid, Lutein, Pigment, Hepatopancreas, Chemistry

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