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

基本信息

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

项目摘要

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.

Tributyltin（TBT）对非目标生物的广泛影响，导致几个发达国家对使用TBT作为沿海船只和水产养殖床的防污剂的限制。关于丁基蛋白水平的各种生物的比较研究表明，在某些较低的营养水平上发生了明显的生物蓄积。即，从海水到浮游植物，再到卡普雷拉属的卡普雷德·阿普赛脚下，这些属于底部地区的藻类群落和水产养殖床，是小的crusceans，具有降低的运动能力，寿命短，寿命短。这些特征表明Caprella spp。可以非常适合监测小空间和临时尺度上的丁基蛋白住宅变化。那就提出了使用Caprella spp的适用性。监测丁基蛋白基线浓度的暂时和空间变化。我们比较了caprilla和伽马体两栖动物的急性毒性，这些毒性都是从Otuschi湾浅水生态系统收集的。结果表明，在1.2-6.6 mg tbt/L的2天后，LCII D250 d2在20℃下，在17.8-23.1 mg tbt/l中明显低于伽马剂。我们收集了Caprellad spp。 from various areas along Japanese costas 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.这表明Caprella spp中BTS的差异。沿日本科斯塔斯州至少在500次的范围内。以上结果表明，Caprella手表是监测丁基蛋白保留在浅水生态系统中的有用方法。