Digenetic trematodes infection on fish was analyzed in the Bohai Sea horn 1983 to 1986.The results showed that the infection value in inner sea was higher than outer sea.

摘要1983~1986年采集于渤的复殖吸虫进行分析，结果表明：从外到度呈现加重的趋势。

The change trend was influenced by several reasons such as the aquatic habitat, the ecological characteristics of fish, the community structure of digenetic trematodes and import of live fish.

这种变化趋势受多种因素的影响，即水环境特点、的生态习性、复殖吸虫的群落结构、活物运输等。