Occurrence of domoic acid in tropical bivalves |
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| Authors: | Takata Yoshinobu Sato Shigeru Ha Dao Viet Montojo Ulysses M Lirdwitayaprasit Thaithaworn Kamolsiripichaiporn Somporn Kotaki Yuichi Fukuyo Yasuwo Kodama Masaaki |
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| Institution: | (1) School of Fisheries Sciences, Kitasato University, Ofunato Iwate, 022-0101, Japan;(2) National Institute of Oceanography, 01 Cau Da, Nha Trang, Vietnam;(3) National Fisheries Research and Development Institute, 940 Quezon Avenue, Quezon City, 1100, Philippines;(4) Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand;(5) Asian Natural Environmental Science Center, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan |
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| Abstract: | Domoic acid was found in bivalves belonging to the genus Spondylus collected randomly from the Philippines, Vietnam, Thailand and Ishigaki Island, Japan. This is the first report of domoic
acid accumulating in bivalves from tropical waters. Large differences in domoic acid levels were observed among the Spondylus specimens collected from different areas. The Spondylus specimens from the Philippines and Vietnam showed higher levels of domoic acid whereas the level in Spondylus spp. from Thailand and Japan was low. The highest level of domoic acid—more than four times the safe consumption level of
20 μg/g whole tissue—was found in a specimen from the Philippines. On the other hand, bivalves other than Spondylus collected from the same area at the same time in the Philippines showed very low levels of domoic acid, showing that bivalves
belonging to the genus Spondylus accumulate specifically high levels of domoic acid. These results suggest the wide distribution of causative phytoplankton
in tropical waters. |
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| Keywords: | Domoic acid Isomers Spondylus spp Tropical waters |
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