title: The First Record of &lt;i&gt;Acanthocyclops trajani&lt;/i&gt; (Copepoda, Cyclopidae) in the Vistula Lagoon of the Baltic Sea
abstract: In 2021 Acanthocyclops trajani Mirabdullayev et Defaye, 2002, was first record in the Vistula Lagoon of the Baltic Sea. This species quickly spread throughout the water area of the Lagoon. In summer, A. trajani reached its maximum development (up to 92 thousand ind./m3, 2.4 g/m3), was a dominant and forming a particularly high proportion of zooplankton in the most polluted, desalinated and eutrophicated eastern part of the Vistula Lagoon. As a result of predatory feeding, A. trajani exerted sign
journal: Биология внутренних вод