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Difficulties in obtaining representative samples for compliance with the Ballast Water Management Convention

DRS at CSIR-National Institute of Oceanography

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Title Difficulties in obtaining representative samples for compliance with the Ballast Water Management Convention
 
Creator Carney, K.J.
Basurko, O.C.
Pazouki, K.
Marsham, S.
Delany, J.E.
Desai, D.V.
Anil, A.C.
Mesbahi, E.
 
Subject ballast
Tetraselmis suecica
 
Description 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 ml sup(-1) showed less than 10 cells ml sup(-1) 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.
 
Date 2013-04-01T11:03:51Z
2013-04-01T11:03:51Z
2013
 
Type Journal Article
 
Identifier Marine Pollution Bulletin, vol.68(1-2); 2013; 99-105
http://drs.nio.org/drs/handle/2264/4275
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2013] Elsevier
 
Publisher Elsevier