Effect of bleaching on lipid content and composition of Okinawan corals |
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Authors: | Hideyuki?Yamashiro Email author" target="_blank">Hirosuke?OkuEmail author Kyoko?Onaga |
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Institution: | (1) Department of Tourism, Meio University, 905-8585 Nago, Okinawa, Japan;(2) Division of Molecular Biotechnology, Center of Molecular Bioscience, University of the Ryukyus, 903-0213 Nishihara, Okinawa, Japan |
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Abstract: | Lipid contents and compositions of the bleached Okinawan corals were analyzed for the first time. Bleached corals collected
at Sesoko Okinawa, Japan (26°38′N, 127°52′E), after the 1998 bleaching event showed decreased lipid content with a concomitant
decline of wax in the lipid composition. The reductionin the lipid content of corals showed diversity depending on their colony
morphology. On the whole, corals of massive morphology were relatively rich in lipid even after the bleaching event, and hence
lesser reduction in the lipid content compared with the cases for those of branching morphology. Furthermore, there was a
positive correlation between lipid content and zooxanthellae density in the bleached corals, suggesting again the importance
of symbiont for the supply of lipid to the host cells, and hence for the survival of the bleaching event. |
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Keywords: | bleaching lipid composition lipid content reef-building coral |
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