Han B C, Hung T C
Institute of Oceanography, National Taiwan University, Taipei, Taiwan.
Environ Pollut. 1990;65(4):347-62. doi: 10.1016/0269-7491(90)90126-w.
The first case of green oysters (Crassostrea gigas) broke out along the Charting mariculture area of south-western Taiwan in January 1986. The green color was found to be due to high copper content in the oyster tissue. Since then, a long-term survey around this area shows that total dissolved copper ranges from 4.99 to 23.6 microg/liter and particulate copper ranges from 1.09 to 5.51 microg/liter in sea-water. The green oysters collected from the Erhjin Chi estuary on 26 January, 1989 gave the highest copper content, 4401+/-79 ppm dry wt. Other green oyster cases were occasionally observed in the Hsiangsan and Anpin mariculture areas. Meanwhile, an experiment of copper accumulation in oysters was conducted at three stations (south-western Taiwan) for up to 90 days. Multiple regression analysis indicates that the food pathway may predominate in copper accumulation by green oysters. This bioaccumulation experiment shows that the total uptake of copper per oyster is an exponential function of exposure time for the first 2 weeks with an accumulation rate of 214 ppm Cu/day and then levels off. The average values of concentration factors for oysters (about 5 x 10(5)) were very close to steady-state values under the natural conditions at each station.
1986年1月，台湾西南部养殖区首次爆发绿牡蛎（太平洋牡蛎）事件。人们发现，牡蛎组织呈现绿色是由于其中铜含量过高。自那时起，对该区域进行的长期调查显示，海水中溶解态总铜含量在4.99至23.6微克/升之间，颗粒态铜含量在1.09至5.51微克/升之间。1989年1月26日从二仁溪河口采集的绿牡蛎铜含量最高，干重为4401±79 ppm。在香山和安平养殖区偶尔也会观察到其他绿牡蛎事件。同时，在台湾西南部的三个站点进行了为期90天的牡蛎铜积累实验。多元回归分析表明，食物途径可能是绿牡蛎积累铜的主要方式。该生物积累实验表明，在前两周内，每只牡蛎对铜的总摄入量是暴露时间的指数函数，积累速率为214 ppm Cu/天，之后趋于平稳。各站点自然条件下牡蛎的浓缩系数平均值（约5×10⁵）与稳态值非常接近。
