International Council for the Exploration of the Sea
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An Assessment of the Efficiencyof Ballast Water Exchange

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conference contribution
posted on 2024-03-22, 10:56 authored by Tracy Mccollin, Aileen M Shanks

No abstracts are to be cited without prior reference to the author.

Ballast water exchange (BWE) has been used for a number of years as a method of reducing the risk of introducing non-native species via ballast water but there have been very few studies to assess the efficiency of this method. There is likely to be a continued reliance on ballast water exchange as the Ballast Water Convention agreed by the International Maritime Organisation (IMO) in 2004 outlines a phase-in period. During this time BWE will be used until alternative technologies are fitted to vessels in order to meet a treatment standard. In order to ensure that the environmental impact of introducing non-native species is reduced it is necessary to examine whether open ocean BWE is an efficient method at reducing the abundance and diversity of organisms within the ballast water. A study carried out by the FRS Marine Laboratory collected samples from a vessel before and after an exchange process on twelve different voyages. A generalized linear model (GLM) was used to assess which factors (e.g. method of exchange, season, and location of exchange) influence the outcome of exchange.



2005 ICES Annual Science Conference, Aberdeen, Scotland


Theme Session Z on How to Improve Environmental Monitoring and Biological Studies – Integrating Ecology and Statistics

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[Authors]. 2005. An Assessment of the Efficiencyof Ballast Water Exchange. 2005 ICES Annual Science Conference, Aberdeen, Scotland. CM 2005/Z:11.

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