香港维多利亚港疏浚淤泥对海洋底栖动物的毒性累积效应

为了评价香港维多利亚港疏浚淤泥对倾倒海区海洋底栖动物的影响，进行了两种底栖贝类和一种底栖甲壳类的生物毒性累积试验．结果表明，试验底牺贝类结蚶（Tegillarcanodifera）和缢蛏（Sinonovaculaconstricta）暴露在试验淤泥中240h和480h后，随暴露时间的延长，累积率增大．暴露240h后，结蚶对Cu、Cd、Hg、油类和Zn的累积率分别为9％、20％、97％、188％和265％，其中对Zn、Hg和油类累积效应明显．缢蛏则主要累积Hg和油类，对Cu和Pb的累积作用相对较弱，而对Zn无明显累积作用．暴露240h后，缢蛏对Pb、Cu、Hg和油类的累积率分别为0％、10％、60％和76％；暴露480h后，继蛏对Hg和油类的累积率分别增大到155％和171％，同时对Pb累积率也达到53％，而对Cu的累积效应增大不明显，累积率仅为15％．试验底栖甲壳类远海梭子蟹（Portunuspelagicus）则主要富集淤泥中的Zn、Pb和油类，其累积率分别为40％、100％和205％，对Cu、Cd和Hg累积效应不明显．

Toxicity accumulation effect of the sludge, dredged from Victoria Port of Hong Kong, to marine benthonic animals

To evaluate the toxicity of the sludge, dredged from Victoria Port of Hong Kong, to marine benthonic animals lived in its pouring region, the toxicity test of the sludge to marine benthonic animals, including benthonic shellfish and crustacean, has been conducted. The results are reported as follows: from the contents of some pollutants in the muscle of Tegillarca nodifera, Sinonovacula constricta and Portunus pelagicus which lived in test sludge for 240h and 480h, Tegillarca nodifear accumulated mainly Hg,oil and Zn, and the accumulation levels are 97%, 188% and 265%, respectively.Sinonovacula constricta mainly accumulated Pb, Hg and oil, their accumulation levels are 53%, 155% and 171% respectively; Portunus pelagicus accumulated chiefly Zn, Pb and oil, and their accumulation levels are 40%, 100% and 205% respectively.