サクラマスの成熟産卵過程におけるカロテノイドの挙動〔英文〕

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The behavior of carotenoids in the course of maturation of the masu salmon was investigated in comparison with that of the chum salmon.The behavior of carotenoids in the masu salmon during anadromous migration was similar to that of the chum salmon. With advancing maturation, the amount of carotenoids decreased in the muscle (0.76→0.06mg/100g) and increased in the skin (1.17→2.80mg/100g) and ovaries (1.24→1.72mg/100g)As the matured masu salmon, the absorption spectra of crude carotenoids extracted from the muscle and the skin changed. In the ovaries, there was no changed observed.With the advance of maturation, the astaxanthin rate in the muscle was largely reduced (80→55%). In the skin, the salmoxanthin rate decreased (39→22%) but the astaxanthin rate increased considerably (2→22%). In the ovaries, the composition of carotenoid did not change.In the masu salmon during the anadromous migration period, astaxanthin was presumed to be converted into zeaxanthin, as was presumed for the chum salmon during the spawning period.
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