Abstract
1. 1. Previously reported carotenoids from sea-urchins are compiled. 2. 2. By modern techniques, including mass spectrometry, adult Ps. miliaris were shown to contain β,β-carotene (1, 10% of total), β, ϵ-carotene (2, 5%), echinenone (4, 10%), lutein (6, 8%) and fucoxanthinol (8, 68%); whereas unfed larvae were enriched in echinenone (4, 92%) as well as bicyclic carotenes. 3. 3. An overall picture showing the preferential localization of individual carotenoids—in particular organs of sea-urchins—is presented. 4. 4. Echinenone appears to be a specific metabolic product and may, possibly as a protein complex, play a functional role in the reproduction of sea-urchins.
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