Caprella watch : new approach for monitoring butyltin levels in the shallow water ecosystem

Caprella 观察：监测浅水生态系统中丁基锡水平的新方法

• 批准号: 09680503
• 负责人: TAKEUCHI Ichiro
• 金额: $ 1.98万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09680503/
• 关键词: acute toxicity; butyltins; Caprella; monitoring; seawater; shallow water ecosystem; チェックリスト; 大槌湾; 海; 生物濃縮係数

The wide impact of tributyltin (TBT) on non-target organisms has led several developed countries to place restrictions on the use of TBT as an antifouling agent for coastal boats and aquaculture beds. A comparative study on the butyltin levels in various organisms showed that marked bioaccumulation occurs in certain lower trophic levels ; i.e., from seawater to phytoplankton and into caprellid amphipods, Caprella spp. Caprella spp., which inhabit algal communities and aquaculture beds in the subtidal zone, are small crustaceans with reduced movement ability and a shortened life-span of less than 3 months. These characteristics indicate that Caprella spp. may be well-suited for monitoring butyltin residue changes over small spatial and temporal scales. Thus, we propose the suitability of using Caprella spp. to monitor temporal and spatial changes in baseline concentrations of butyltins. We compared the acute toxicity of caprellid and gammarid amphipods, both collected from the shallow water ecosystem of Otuschi Bay. The results show LCィイD250ィエD2 at 20℃ after 2 days of caprellids in 1.2-6.6 mg TBT/L are significantly lower than gammarids in 17.8-23.1 mg TBT/L. We have collected Caprella spp. from various areas along Japanese coasts since 1997. The preliminary results on the BTs (TBT, DBT and MBT) indicate that BTs vary from 1 ng/g wet weight in C. penantis R-type from Tobishima Island in the Sea of Japan to 466 ng/g wet weight in C. decipiens from Amakusa Islands, western Kyushu. This indicates that the difference of BTs in Caprella spp. is in the range of at least 500 times along Japanese coasts. The above results indicate that Caprella watch is a useful approach for monitoring butyltin residues in the shallow water ecosystem.

三丁基锡(TBT)对非目标生物的广泛影响导致几个发达国家限制将TBT用作沿海船只和水产养殖床的防污剂。对不同生物中丁基锡水平的比较研究表明，在某些营养水平较低的地方，即从海水到浮游植物，再到角足类动物Caprella spp.，都会发生显著的生物积累。卡普雷拉是一种小型甲壳类动物，生活在潮下带的藻类群落和水产养殖床上，活动能力减弱，寿命缩短不到3个月。这些特征表明，卡普雷拉(Caprella spp.)可能非常适合于监测丁基锡残留在小空间和时间尺度上的变化。因此，我们提出了使用Caprella spp.的适用性。监测丁基锡基线浓度的时间和空间变化。我们比较了采自奥图斯奇湾浅水生态系统的两种两足类的急性毒性。结果表明，LCィイ、D250、ィエ、D2在2天后20℃的浓度为1.2mgTBT/L~6.6mgTBT/L，显著低于伽玛鱼的17.8mgTBT/L~23.1mgTBT/L。自1997年以来，日本沿海的不同地区都出现了这种情况。对BTS(TBT、DBT和MBT)的初步研究结果表明，BTS的变化范围从日本海托比岛R型斑节对虾1 ng/g湿重到九州西部阿马库萨群岛落叶对虾466 ng/g湿重。这说明刺山羊肚菌BTS在不同品种间的差异。在日本沿海至少在500倍的范围内。上述结果表明，Caprella Watch是一种监测浅水生态系统中丁基锡残留的有效方法。

项目成果

Kawashima, H.: "Fatty acid composition in four of caprellid amphipod species (Crustacea) from Otsuchi and Mutsu Bays, Northern Japan."J. Japan Oil Chem. Soc.. 48(6). 595-599 (1999)

Kawashima, H.：“来自日本北部大槌湾和陆奥湾的四种蚱蜢片足类动物（甲壳类）的脂肪酸组成。”J.

Kawashima,H.et al.: "Fatty acid composition in four of caprellid amphipod species(Crustacea) from Otsuchi and Mutsu Bays,northern Japan"Journal of Japan Oil Chemists'Society. 48(6). 595-599 (1999)

Kawashima,H.et al.：“来自日本北部大槌湾和陆奥湾的四种甲壳类片脚类动物的脂肪酸组成”日本石油化学会杂志。

Takahashi,S.: "Distribution and specific accumulation of butyltin compounds in a marine ecosystem." Archives of Environmental Contamination and Toxicology. (印刷中). (1999)

Takahashi, S.：“海洋生态系统中丁基锡化合物的分布和特定积累。”环境污染和毒理学档案（1999 年）。

Kawashima, H. et al.: "Fatty acid composition in four of caprellid amphipod species (Crustacea) from Otsuchi and Mutsu Bays, northern Japan"Journal of Japan Oil Chemists' Society. 48(6). 595-599 (1999)

Kawashima, H.等人：“来自日本北部大槌湾和陆奥湾的四种蚱蜢片足类动物（甲壳类）的脂肪酸组成”日本石油化学会杂志。

Takahashi, S: "Distribution and specific accumulation of butyltin compounds in a marine ecosystem."Arch. Environ. Contam. Taxicol.. 37. 50-61 (1999)

Takahashi, S：“丁基锡化合物在海洋生态系统中的分布和特定积累。”Arch。