were the most abundant compounds in these environments and in total
accounted for 8.2–62.2% and 32.1–89.0% of the total OCPs in seafoods, respectively. The total OCP contents
were higher in seafoods from Shengsi and Putuo and lower in those from Dinghai and Daishan.
The ratios of (DDE + DDD)/DDTs reflected a mixed input of accumulated and fresh DDTs in Shengsi, Putuo