Neogastropod imposex for monitoring recovery from marine TBT contamination

被引:22
作者
Tester, M
Ellis, DV
Thompson, JAJ
机构
[1] UNIV VICTORIA, DEPT BIOL, VICTORIA, BC V8W 2Y2, CANADA
[2] FISHERIES & OCEANS CANADA INST OCEAN SCI, CONTAMINANTS SCI SECT, SIDNEY, BC V8L 4B2, CANADA
关键词
imposex; TBT; whelks; bioindicator; recovery;
D O I
10.1002/etc.5620150422
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Imposex, the imposition of male sexual characters on female snails, was used as a bioindicator of recovery from tributyltin (TBT) pollution in the Pacific Northwest. Whelks surveyed before TBT use was regulated had shown a high frequency of affected females in the Strait of Juan de Fuca and the Strait of Georgia; and lower frequency on the west coast of Vancouver Island. A reduction in imposer is now evident on the west coast of Vancouver Island and in some locations in the Strait of Georgia. There is no clear evidence of recovery near Victoria, and Vancouver Harbour still does not have whelks in any abundance, if at all. Of the four species studied, Nucella emarginata is the most suitable bioindicator species because it is abundantly distributed and has the shortest lifespan (1-2 years). When frequency of imposer remains at 100%, the FPL (female penis length) is still available as a useful bioindicator.
引用
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页码:560 / 567
页数:8
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