In 1961, 32 lakes belonging to Vitebsk fish farm (nothern Belarus) were surveyed to desribe the hydrology, water chemistry, forage reserve for fish, and eco-biological parameters of the latter. The check list of fish species includes introduced Carassius auratus gibelio, Cyprinus carpio and Cyprinus carpio haematopterus.
[Savina NO (1964) Results of complex fishery studies of waterbodies of the Vitebsk fish farm. In: Proceedings X Scientific conference on inland waters of the Baltic Sea region, 6-10 May 1963, Minsk, p 38-45. Nauka i Tekhnika Press, Minsk (in Russian)]