飼料によるニシキゴイ体色の鮮明化

概要

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In order to improve the color of fancy carp, test diets containing alralfa meal, mysis, lutein or astaxanthin were fed to solid red yearlings and red mottled 3-year-old fish for 63 days. The redness of the fish skin increased proportionally to the amounts of the carotenoids in the diets. Astaxanthin was more effective in color development than lutein, and produced bright red color. Cholesterol added to the test diets had no effect on the accumulation of carotenoids. Accumulation rate of dietary carotenoids in the fish skin was calculated to be 2% in average.
日本水産學會の論文