Journal
MARINE BIOLOGY
Volume 158, Issue 1, Pages 87-100Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00227-010-1544-z
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- Ministry of Education, Culture, Sports, Science and Technology of Japan [21310011]
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Loss of zooxanthellae (dinoflagellate Symbiodinium) from corals will sometimes lead to mass mortality of corals. To detect and quantify Symbiodinium released from corals, we developed a zooxanthellae trap and a quantitative PCR (qPCR) system with Symbiodinium clades A-F-specific primer sets. The trap was attached to a branch or the surface of several wild stony corals, and the water samples within the traps, including released Symbiodinium, were subjected to qPCR. All tested corals released clade C Symbiodinium at estimates of similar to 5,900 cells h(-1) cm(-2) of coral surface. Although all tested Pocillopora eydouxi harboured both clades C and D, some of these colonies released only clade C or released a lesser amount of clade D than that in the tissues. Our Symbiodinium quantification system revealed that wild hermatypic corals constantly release Symbiodinium to the environment. Our result suggests that some corals may discharge certain clades of Symbiodinium alternatively.
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