Lookup NU author(s): Katharine Carney,
Dr Kayvan Pazouki,
Dr Sara Marsham,
Dr Jane Delany,
Professor Ehsan Mesbahi
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As implementation of the Ballast Water Convention draws nearer a major challenge is the development of protocols which accurately assess compliance with the D-2 Standard. Many factors affect the accuracy of assessment: e.g. large volume of ballast water, the shape, size and number of ballast tanks and the heterogeneous distribution of organisms within tanks. These factors hinder efforts to obtain samples that truly represent the total ballast water onboard a vessel. A known cell density of Tetraselmis suecica was added to a storage tank and sampled at discharge. The factors holding period, initial cell density and sampling interval affected representativeness. Most samples underestimated cell density, and some tanks with an initial cell density of 100 cells ml1 showed <10 cells ml1 at discharge, i.e. met the D-2 standard. This highlights difficulties in achieving sample representativeness and when applied to a real ballast tank this will be much harder to achieve.
Author(s): Carney KJ, Basurko OC, Pazouki K, Marsham S, Delany JE, Desai DV, Anil AC, Mesbahi E
Publication type: Article
Publication status: Published
Journal: Marine Pollution Bulletin
Print publication date: 15/03/2013
ISSN (print): 0025-326X
ISSN (electronic): 1879-3363
Publisher: Elsevier Ltd
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