New data regarding ecology of freshwater pelagic amphipod Macrohectopus branickii and other crustaceans of plankton from the southern part of Lake Baikal

In this study, we present a list of crustaceans traced in plankton the southern basin Lake Baikal addition to some details regarding ecological peculiarities only known freshwater pelagic amphipod Macrohectopus branickii. The is an active predator among major parts food chain. Its role lake’s ecosystem similar that Antarctic krill and mysids Europe North America water bodies. As swimmer, M. branickii performs daily vertical migrations. Besides, species also has horizontal migrations migrating swarms, including time during breeding period, hamper studies. We were interested clarify features ecology. material used samples obtained 0 250 m layer with Juday net every 7 10 days from 2013 until 2018 as part long-term monitoring project pelagial. Sampling was conducted lake off shore Bolshie Koty Village. results showed presence one peak young which at its maximum May. 1 6 mm group containing individuals males occurs July, same slight increase immature females comparison first can be seen. This finding might directly linked warming trend Baikal.