Abstract
Ballast water samples were taken from three ships that arrived at the Port of Vladivostok (Peter the Great Bay, Sea of Japan) from ports of Japan (Sea of Japan and Pacific Ocean) and China (Yellow Sea and Yangtze River). The holoplankton in samples was presented by seven taxonomic groups, among which copepods (subclass Copepoda, 33 species) and cladocerans (subclass Cladocera, 5 species) dominated. In the samples, eight nonindigenous copepod species were revealed. The information contained in this paper may be of importance for the assessment of the risk of subsequent invasion of new species and the development of techniques for monitoring the qualitative and quantitative structures of ballast water.
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