Izabela Jabłońska-Barna, Jacek Koszałka and Aleksander Bielecki
University of Warmia and Mazury in Olsztyn, Oczapowskiego 5, 10-957 Olsztyn,
Poland
Key words: Hirudinea, Wigry Lake, Helobdella stagnalis, Piscicola pojmanskae, Piscicola pomorskii.
Abstract.
The species composition of leeches and their density and biomass were studied
in the Wigry Lake littoral zone (northeast Poland). Thirteen species were recorded
including two species described recently, i.e., Piscicola pojmanskae
and P. pomorskii. The most abundant species was Helobdella stagnalis
(51% and 16% of the abundance and biomass of Hirudinea, respectively).