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''Karenia mikimotoi'' is a microbial species from the genus ''Karenia'', which are dinoflagellates. Its first appearance was in Japan in 1935 and since then, it has appeared in other parts of the world such as the east coast of the USA, Norway, and the English Channel. ==Description== ''Karania mikimotoi'' has yellow-brown chloroplasts and, like other species in its genus, is able to activate photosynthetically. It lacks thecal plates, and is more ovular. Blooms usually form during warmer months. The toxicity of ''Karenia mikimotoi'' is not fully understood, whereas other species in ''Karenia'' have identified toxins that are shown to kill marine life. For example, ''Karenia brevis'' has brevetoxins. It is believed that its killing effects are due to a combination of the creation of an anoxic environment by the physical bloom itself in addition to some sort of toxin. New toxins called gymnocin A and B were recently discovered,〔Silke, J., et al. (''Karenia mikimotoi'': An exceptional dinoflagellate bloom in western Irish waters, summer 2005. ) Marine Institute. Marine Environment and Food Safety Services, Galway. November, 2005. Accessed 9 May 2013.〕 but their low toxicity is inconsistent with the high number of deaths ''Karenia mikimotoi'' causes. It is believed that in red tides, ''Karenia mikimotoi'' fills in the fish’s gills, thereby allowing direct contact with toxins. This is a more likely approach to the toxin’s mechanisms. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Karenia mikimotoi」の詳細全文を読む スポンサード リンク
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