Abstract
The Chinese sleeper Perccottus glenii Dybowski, 1877 is one of the most successful alien species in Europe today. This article is a review of the current distribution of the species in Ukraine using published data, own field studies (2005–2016) and collections from museums and colleagues. The Chinese sleeper has been confirmed in the Vistula, Danube, Dniester, Southern Bug and Dnipro river basins, with earlier occurrence (1970s–90s) in the Vistula, Danube and Dniester river basins. As a result, the species is distributed more evenly in these river basins. The Chinese sleeper was first recorded in the Dnipro and Southern Bug river basins in the 21st century; hence, its occurrence is still irregular. Present data suggest that, in some regions, the species could inhabit not only floodplains and bays but also fluvial river sections.
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