Bioaccumulation of Heavy Metals in Commercial Fishes and Their Affection in the Pearl River Basin,China
With Humen Section of the Pearl River basin in Guangzhou as the research object,the main economic fishes were collected,and the concentration and biological amplification characteristics of heavy metals in the body of economic fishes in the Pearl River basin were discussed by measuring the heavy metals including Pb,Cd,Co,Cr,Cu,Fe,Mn,Zn in the water body and fish body,and combining the stable carbon and nitrogen isotopes in the fish body.The total amount of heavy metals in the fish varied from 37.78 to 263.81,with an average of 104.4 μg/gDW(dry weight).Co,Cr,Zn,Fe,Cu and Mn in the Pearl River fish and Pb and Cd were positively correlated,and the variation pattern of heavy metal bioaccumulation factors(Log BAFs)is Co(4.0)＞Cd(3.2)＞Cu(2.7)=Pb(2.7)＞Zn(2.5)＞Fe(2.4)＞Cr(2.2)＞Mn(1.4).The variation range of heavy metal biomagnification factors(TMFs)is 1.04～1.19,with an average value of 1.11.The bioaccumulation of different types of economic fishes in the Pearl River is obviously related to the food and habitat.The carnivorous fishes in Humen Section,the red wolf goby(Odontamblyopus rubicundus)and the speartail goby(Chaetrichthys stigmatias),have obvious sources of heavy metals enrichment and bottom sediment habitat.The economic fishes in the Pearl River in Guangzhou have obvious potential biological amplification effect,and the health risk of heavy metals in fish in the Pearl River basin increased significantly with the increase of trophic level.
the Pearl Riverfishheavy metalsbioenrichmentbiological amplification
万方数据
维普
