Imposex of Thais clavigera and Cantharus cecillei in the coastal waters of Xiamen

海产腹足类性畸变以其对有机锡的敏感性、特异性和不可逆性而成为海洋有机锡污染的理想指示种。调查研究了厦门海域岩相海岸带疣荔枝螺(THAIS ClAVIgErA)和甲虫螺(CAnTHAruS CECIllEI)的性畸变情况,通过生物学指标IOI(性畸变率)、rPSI(相对阴茎发展指数)、VdSI(输精管发展指数)及SrI(性比指数)综合评价其性畸变发展程度,间接指示厦门周边海域的有机锡污染程度。研究结果发现,在采集疣荔枝螺的17个站点中有5个站点种群性畸变率为100%,其中宝珠屿种群性畸变程度最为严重,VdSI达4,采集甲虫螺的4个站点的种群性畸变率均为100%。性畸变程度较严重的种群普遍集中于厦门西港,并且表现出由港内到港外逐渐减轻的趋势,而白城、会展中心和大嶝岛等位于开阔的厦门东海域的种群性畸变程度最轻,与往年厦门西海域有机锡污染监测数据相比一致,体现出性畸变程度与有机锡污染程度及海港码头远近之间的相互关系。The degree of imposex,i.e.the imposition of male characteristics onto females,in neogastropods can be used as a sensitive and accurate biomarker to evaluate organotin contamination in coastal marine environment.Now,the imposex status in females of Thais clavigera and Cantharus cecillei in 17 sites was investigated to evaluate the organotin contamination along Xiamen Bay during 2006 and 2007.The four indices including incidence of imposex(IOI),relative penis size index(RPSI),vas deferens sequences index(VDSI) and sex ratio index(SRI) were used comprehensively to assess the imposex status in order to ascertain the extent of organotin bioavailability in Xiamen Bay.Based on this research,T.clavigera in 5 sites and C.cecillei in all survey sites exhibited the IOI of 100%.At Bao ZhuYu Islet,the imposex level was the most serious with maximum VDSI value of 4.In general,the imposex level decreased from the inner to the outer of Xiamen Western Harbour,and the populations in the open Xiamen Eastern Waters including Bai Cheng,Convention and Exhibiton Center and Dadeng Island showed a lower imposex level.These results were accordant with the concentrations of organotins in 2005.The imposex degree also increased with increasing organotin contamination and decreasing distance from shipping facilities.国家自然科学基金资助项目(40476048);厦门大学近海海洋环境科学国家重点实验室开放基金资助项目;厦门大学新世纪优秀人才计划基金资助项

Imposex ofTha is clavigera and Can tharus cecillei in the coa sta lwa ters ofX iam en

[摘要]：海产腹足类性畸变以其对有机锡的敏感性、特异性和不可逆性而成为海洋有机锡污染的理想指示种。调查研究了厦门海 域岩相海岸带疣荔枝螺(Tha is clavigera ) 和甲虫螺(Cantha rus cecillei) 的性畸变情况, 通过生物学指标IO I( 性畸变率)、RPSI( 相 对阴茎发展指数)、VDSI(输精管发展指数)及SRI(性比指数) 综合评价其性畸变发展程度, 间接指示厦门周边海域的有机锡污 染程度。研究结果发现, 在采集疣荔枝螺的17个站点中有5个站点种群性畸变率为100%, 其中宝珠屿种群性畸变程度最为严 重, VDSI达4, 采集甲虫螺的4个站点的种群性畸变率均为100%。性畸变程度较严重的种群普遍集中于厦门西港, 并且表现 出由港内到港外逐渐减轻的趋势, 而白城、会展中心和大嶝岛等位于开阔的厦门东海域的种群性畸变程度最轻, 与往年厦门西 海域有机锡污染监测数据相比一致, 体现出性畸变程度与有机锡污染程度及海港码头远近之间的相互关系。[Abstract]:The degree of mi posex, .i e. the mi position ofmale characterist ics onto females, in neogastropods can be used as a sensit ive and accurate biomarker to evaluate organotin contam inat ion in coastalmarine environment. Now, the mi posex status in females ofTha is clavigera andCantharus cecillei in 17 s ites was investigated to evaluate the organotin contam ination along Xiamen Bay during 2006 and 2007. The four indices including inc idence of mi posex( IO I), relative pen is size index (RPSI), vas deferens sequences index(VDSI) and sex ratio index( SRI) were used comprehens ively to assess the mi posex status in order to ascertain the extent of organotin bioavailab ility in Xiamen Bay. Based on this research, T. clavigera in 5 s ites and C. cecillei in all survey sites exhib ited the IOI of 100%. A t Bao ZhuYu Islet, the mi posex level was the most serious with maxmi um VDSI value of 4. In genera,l the mi posex level decreased from the inner to the outer ofX iamen Western H arbour, and the populations in the open X iamen EasternWaters including Ba iCheng, Convention and Exhib iton Center and Dadeng Is land showed a lower mi posex leve.l These results were accordantwith the concentrations of organotins in 2005. The mi posex degree also increased with increas ing organot in contam inat ion and decreasing distance from shipping facilities.国家自然科学基金资助项目( 40476048); 厦门大学近海海洋环境科学国家重点实验室开放基金资助项目; 厦门大学新世纪优秀人才 计划基金资助项