Establishment of the baikalian amphipod Gmelinoides fasciatus (Amphipoda, Crustacea) in Lake Onega [Russian]

摘要

In recent time, some amphipod species, including the Baikalian amphipod Gmelinoides fasciatus (Stebbing), have expanded their range in Europe. In the 1990s, G. faciatus were successfully naturalized in Ladoga and Beloe lakes directly connected with Lake Onega. In the summer of 2001, the Baikalian amphipod G. fasciatus was found for the first time in the western areas of Onega Lake and in the Svir River. The density (1200-8300 ind./m(2)), biomass (4-40 g/m(2)), and fecundity (up to 20 eggs per female) were rather high. G. faciatus was the most abundant species (about 50% of the total abundance) in the littoral invertebrate communities of Onega Lake. So, at the present time, the Baikalian amphipod G. faciatus has successfully established in the littoral zone of this lake.