Spatiotemporal distribution of arsineic species of oysters (Crassostrea gigas) in the coastal area of southwestern Taiwan |
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Authors: | Chen-Wuing Liu Yung-Kay Huang Yu-Mei Hsueh Kao-Hung Lin Cheng-Shin Jang Lan-Ping Huang |
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Institution: | (1) Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, Taiwan, 106, Republic of China;(2) Graduate Institute of Medical Sciences, Taipei Medical University, Taipei, Taiwan, 110, Republic of China;(3) Department of Public Health, School of Medicine, Taipei Medical University, Taipei, Taiwan, 110, Republic of China;(4) Sustainable Environment Research Center, National Cheng Kung University, Tainan, Taiwan, 701, Republic of China;(5) Department of Leisure and Recreation Management, Kainan University, Luzhu, Taoyuan, Taiwan, 33857, Republic of China |
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Abstract: | This study investigated total arsenic (As) and As species contents of oysters (Crassostrea gigas) in different production areas, seasons and sea locations on the southwestern coast of Taiwan. Analytical results indicate
that contents of total As, arsenite, arsenate, dimethylarsinic acid, monomethylarsonic acid and arsenobetaine in oysters are
9.90 ± 3.68, 0.091 ± 0.104, 0.033 ± 0.038, 0.529 ± 0.284, 0.037 ± 0.046 and 3.94 ± 1.33 mg/g (dry wt), respectively. A ratio
of inorganic As concentrations to total As concentrations is 1.26%. Total As contents of oysters cultured in the outer sea
are statistically significantly lower than those of oysters cultured in the inner sea. The total As contents of oysters is
the highest in Putai, where the blackfoot disease prevails. The low As contents in oysters is attributed to the low temperature
in winter, which slows the metabolism of oysters. A maximum value is 33.37 μg/g (dry) in Putai in spring, because a considerable
amount of aquacultural waste water with high As contents is discharged into adjacent drainage channels and rivers there during
that season. |
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Keywords: | Oyster Arsenic species Blackfoot disease Spatiotemporal distribution |
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