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1984—1985年,对苏州地区不同营养类型湖泊9种经济鱼类中26种金属元素含量进行了测定和分析。①在湖泊中污染区的鱼体金属元素含量要比非污染区高。②鱼对金属元素的吸收、富集规律是:底层鱼>中层鱼>上层鱼;食物链长的鱼>食物链短的鱼(即肉食性鱼>杂食性鱼>草食性鱼);鱼鳃>鱼肉。③在相同的环境条件和生长状况下,鱼体中金属元素含量具有相对的稳定性;鱼在污染性湖泊中具有区域性分布的特点,因而鱼也是污染物的指示者之一。④苏州地区湖泊鱼体中金属元素的自然含量不太高,与苏联里海地区的鱼类相近似;它们在鱼体内的排列次序为:铁>锌>锶>铜>铅>钡>锂>铌>镓>镍>铈>钛>锰>钍>钴>铬>砷>汞>镉>钒>锆>钇>镧>铍≥镱>钼。
From 1984 to 1985, 26 kinds of metal elements in 9 kinds of economic fish in different types of lakes in Suzhou area were measured and analyzed. (1) The content of metal elements in fish in the polluted area in lakes is higher than that in non-polluted area. ② fish on the absorption of metal elements, the enrichment of the law are: the bottom of the fish> middle fish> the upper fish; food chain length of the fish> food chain short fish (ie, carnivorous fish> omnivorous fish> herbivorous fish) . ③ Under the same environmental conditions and growth conditions, the content of metal elements in the fish is relatively stable; the fish has the characteristics of regional distribution in polluted lakes, and therefore the fish is also one of the indicators of pollutants. (4) The natural content of metal elements in lakes and fish in Suzhou area is not too high, which is similar to that in the Caspian Sea in the Soviet Union. The order of their arrangement in the fish is iron> zinc> strontium> copper> lead> barium> lithium> niobium > Gallium> nickel> cerium> titanium> manganese> thorium> cobalt> chromium> arsenic> mercury> cadmium> vanadium> zirconium> yttrium> lanthanum> beryllium> ytterbium> molybdenum.