FIRST FINDING OF PONTO-CASPIAN INVASIVE AMPHIPOD <i>CHELICOROPHIUM CURVISPINUM</i> (G.O. Sars, 1895) (AMPHIPODA, CRUSTACEA) IN LADOGA
The invasive amphipod Chelicorophium curvispinum (G.O. Sars, 1895) (Amphipoda, Crustacea) was first recorded in Ladoga in the area of the Volkhov Bay in August 2009. The data on quantitative development of this species and two other species of alien invasive amphipods (Baikalian Gmelinoides fasciatus (Stebbing, 1899) and Ponto-Caspian Pontogammarus robustoides G.O. Sars, 1894) in three different biotopes in littoral zone of the lake are presented. As a result of recent invasions of these invasive amphipod species, serious transformations of the littoral zone communities of this largest European lake are possible.