PRELIMINARY STUDY ON TISSUE DISTRIBUTION AND BIOTRANSFORMATION OF DDTS AND HCHS IN TWO MARINE GASTROPODS, BURSA RANA AND TONNA SULCOSA, FROM THE PEARL RIVER ESTUARY, CHINA

文献类型： 外文期刊

第一作者： Tian, Lei

作者： Tian, Lei;Zhang, Dawen;Huang, Xiaoping;Ye, Feng;Zeng, Yanyi;Tian, Lei;Ye, Feng;Zeng, Yanyi;Zhang, Dawen

作者机构：

关键词： DDTs;HCHs;Marine gastropods;Pearl River Estuary

期刊名称：FRESENIUS ENVIRONMENTAL BULLETIN （ 影响因子：0.489； 五年影响因子：0.479 ）

ISSN： 1018-4619

年卷期： 2011 年 20 卷 10A 期

页码：

收录情况： SCI

摘要： In this study, tissue distribution and biotransformation of the DDTs and HCHs were examined in two marine gastropods, Bursa rana and Tonna sulcosa from the Pearl River Estuary, China. The highest DDTs and HCHs concentrations in the gonad of B. rana and T. sulcosa show that gonad of gastropods is the major site for residues of DDTs and HCHs, and imply that OCPs may exert potential threats to gastropods reproductive system and their offsprings, hence reduce the survival rate of marine gastropods and affect population dynamics in natural condition. DDTs and HCHs concentrations in intestine of T. sulcosa were as nearly three folds as that of B. rana, but these values in other tissues of T. sulcosa were lower than that of B. rana, demonstrating that both routes of DDTs and HCHs uptake (gills and gastrointestinal tract) are important in B. rana, while in T. sulcosa, aqueous uptake seems to be more important. Meanwhile, it is likely that the intestinal wall of T. sulcosa forms an important barrier to DDTs and HCHs. Compared with the (DDE+DDD)/p,p'-DDT ratio in sediment (1.23), the much higher of this ratio in biota samples (1.53-3.85) indicates that gastropods have the capacity to metabolize DDT partially. Among HCHs in all tissues, beta-HCH was the most persistent HCH isomer (56.66%-91.35%), implying that gastropods are able to degrade alpha-HCH to beta-HCH efficiently.

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