The contents of PAHs in sediment of Songhua river are more higher than that in water.BCF of PAHs in the clam bodies is higher.The contents of PAHs in catfish are higher than that in clam.

• 松花江底质中的多环芳烃含量远远高于江水,蚌体内也富集了较高倍数的多环芳烃,鲶鱼体内多环芳烃的含量大于食物链较低级层次的蚌。