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Open AccessArticle

Carotenoids of Sea Angels Clione limacina and Paedoclione doliiformis from the Perspective of the Food Chain

1
Research Institute for Production Development, Shimogamo-Morimoto-cho 15, Sakyo-ku, Kyoto 606-0805, Japan
2
Okhotsk Sea Ice Museum of Hokkaido, Motomombetsu, Monbetsu, Hokkaido 094-0023, Japan
3
Hokkaido Research Organization, Abashiri Fisheries Research Institute, Minatomachi, Monbetsu, Hokkaido 094-0011, Japan
*
Author to whom correspondence should be addressed.
Mar. Drugs 2014, 12(3), 1460-1470; https://doi.org/10.3390/md12031460
Received: 16 January 2014 / Revised: 19 February 2014 / Accepted: 3 March 2014 / Published: 13 March 2014
(This article belongs to the Special Issue Marine Carotenoids (Special Issue))
Sea angels, Clione limacina and Paedoclione doliiformis, are small, floating sea slugs belonging to Gastropoda, and their gonads are a bright orange-red color. Sea angels feed exclusively on a small herbivorous sea snail, Limacina helicina. Carotenoids in C. limacina, P. doliiformis, and L. helicina were investigated for comparative biochemical points of view. β-Carotene, zeaxanthin, and diatoxanthin were found to be major carotenoids in L. helicina. L. helicina accumulated dietary algal carotenoids without modification. On the other hand, keto-carotenoids, such as pectenolone, 7,8-didehydroastaxanthin, and adonixanthin were identified as major carotenoids in the sea angels C. limacina and P. doliiformis. Sea angels oxidatively metabolize dietary carotenoids and accumulate them in their gonads. Carotenoids in the gonads of sea angels might protect against oxidative stress and enhance reproduction. View Full-Text
Keywords: carotenoids; sea angels; food chain; metabolism carotenoids; sea angels; food chain; metabolism
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Maoka, T.; Kuwahara, T.; Narita, M. Carotenoids of Sea Angels Clione limacina and Paedoclione doliiformis from the Perspective of the Food Chain. Mar. Drugs 2014, 12, 1460-1470.

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