摘要：This paper analyses the dangerous consequences of contamination of coastal waters by nonindigenous sea species spread by ships ballast waters. It specifically points out that the measures currently recommended to a void the danger are merely palliative and a radical solution is yet to be seen. Furthermore, the impacts of some nonindigenous species that have already been spread, whether accidentally or intentionally, are being outlined as well as a possible approach to the treatment of ships ballast waters. Notwithstanding the actual selection of the treatment treatment of ballast waters still on board ships seems to be imposing itself as the solitary solution with any realistic chances for global success. Finally, a pledge is being made that each coastal country conduct a research on its own species resilience to biocidal treatment and thus contribute in finding a radical solution to this global problem.
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