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Lookup NU author(s): Emeritus Professor Stewart Evans
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The condition known as imposex in whelks has been used widely as a biological indicator of tributyltin (TBT) contamination in the marine environment. It has provided valuable information on the extent and impact of contamination. It has also been used successfully in monitoring changes in levels of contamination since regulations, limiting the use of TBT-based antifoulants to vessels >25 m in length, were introduced. However, its misuse has also generated misleading information. There have been at least four reasons for this. First, sampling has been biased on 'hot-spots' of contamination, giving a false impression of the severity of the problem. Second, imposex is not, as has often been assumed, a specific response to TBT. Third, insufficient attention has been given to the longevity and habits of indicator species. Fourth, predictions of extinctions of species, which have been based on assessments of imposex, have not been fulfilled. It is argued that, while biological indicators should play key roles in assessing the impacts of pollutants, rigorous protocols are needed.
Author(s): Evans SM, Nicholson GJ
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: OCEANS '99 - Riding the Crest into the 21st Century
Year of Conference: 1999
Pages: 1115-1118
Publisher: IEEE
URL: http://dx.doi.org/10.1109/OCEANS.1999.800145
DOI: 10.1109/OCEANS.1999.800145
Library holdings: Search Newcastle University Library for this item
ISBN: 0780356284
