Accumulation of organotin compounds and marine birnavirus detection in Korean ascidians |
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Authors: | Kaoru Azumi Shinji Nakamura Shin-Ichi Kitamura Sung-Ju Jung Keisuke Kanehira Hisato Iwata Shinsuke Tanabe Satoru Suzuki |
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Institution: | Division of Innovative Research, Creative Research Initiative 'Sousei' (CRIS), Hokkaido University, Sapporo, Hokkaido 001-0021,;Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama, Ehime 790-8577, Japan, and;Department of Aqualife Medicine, Chonnam National University, San 96-1, Dunduk-dong, Yosu 550-749, Korea |
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Abstract: | ABSTRACT: Recently, a serious disease spread extensively in aquaculture sites of the ascidian Halocynthia roretzi in Korea. To understand circumstances of ascidians in Korean aquaculture sites, residue levels of organotin compounds were analyzed, and detection of a marine birnavirus (MABV) in tissues of H. roretzi was attempted. Korean H. roretzi showed high concentrations of butyltins (mono, di, and tributyltins), especially in the gill, hepatopancreas, and digestive tract. However, there was no significant difference in the residues of butyltins in the hepatopancreas between diseased and non-diseased ascidians. The positive rate of MABV detection was high in the hepatopancreas, but also no significant difference was observed between diseased and non-diseased individuals. These observations suggest that an accumulation of tributyltin and a latency of MABV in H. roretzi tissues does not directly relate to the occurrence of the disease. |
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Keywords: | ascidian birnavirus disease Halocynthia roretzi organotin compounds |
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