Iodine-129 with a long half-time of 1.6 × 107 y was discharged into the Pacific Ocean during the final safety tests of the first commercial nuclear fuel reprocessing plant in Japan, at Rokkasho, Aomori Prefecture. Olive flounder (Paralichthys olivaceus) is an important fishery along this coast. It is necessary to determine whether 129I accumulates in this species to assess the possible public acceptance. We developed a short-term metabolism model of 125I in the flounder using retention data for 1-6 days after the olive flounder had ingested a freshwater fish species, medaka (Oryzias latipes), that had been labeled with 125I by keeping them in water containing 125I for 7 days. A single compartment model constructed from whole-body retention data for 125I in the olive flounder, excluding the gastrointestinal tract and its contents, revealed a biological half-time of 2.9 days for 125I. When the gill and other tissues were separated to individual compartments, the biological half-time in the gill was three times longer than that in the other tissue, though the half-time in the gill is not statistically significant. The distribution of 125I among various tissues in the flounder 6 days after the ingestion of labeled medaka once a day for 6 days differed from that of stable I, suggesting that the biological half-time is longer in certain tissues. Further study is necessary to elucidate the metabolism of radioiodine in the flounder.

中文翻译：

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橄榄比目鱼（Paralichthys olivaceus）摄入的生物掺入的125 I的短期代谢。

半衰期为1.6×107 y的Iodine-129在日本青森县六所所第一座商业性核燃料后处理厂的最终安全测试期间被排入太平洋。橄榄比目鱼（Paralichthys olivaceus）是该海岸重要的渔业。有必要确定129I是否在该物种中积累，以评估可能的公众接受度。在橄榄比目鱼进食了淡水鱼种medaka（Oryzias latipes）之后，我们使用比目鱼1-6天的保留数据，在比目鱼中建立了125I的短期代谢模型，该鱼种通过将它们保存在含有125I的水中125I持续7天。根据橄榄比目鱼体内125 I的全身保留数据构建的单室模型，不包括胃肠道及其内容，揭示了125I的生物半衰期为2.9天。当腮和其他组织分隔成单独的隔室时，腮中的生物学半衰期是其他组织中生物学半衰期的三倍，尽管腮中的半衰期没有统计学意义。每天摄取标记的红花丹6天后6天，比目鱼各组织中125 I的分布与稳定I的分布不同，这表明某些组织的生物半衰期较长。为了阐明比目鱼中放射性碘的代谢，有必要做进一步的研究。尽管the的半场时间在统计上并不显着。每天摄取标记的红花丹6天后6天，比目鱼各组织中125 I的分布与稳定I的分布不同，这表明某些组织的生物半衰期较长。为了阐明比目鱼中放射性碘的代谢，有必要做进一步的研究。尽管the的半场时间在统计上并不显着。每天摄入标记的红花6天后6天，比目鱼各组织中125 I的分布与稳定I的分布不同，这表明某些组织的生物半衰期较长。为了阐明比目鱼中放射性碘的代谢，有必要做进一步的研究。