[Bergman E. 1990 - Effects of roach Rutilus rutilus on two percids, Perca fluviatilis and Gymnocephalus cernua: importance of species interactions for diet shifts - Oikos 57: 241-249.]Search in Google Scholar
[Bergman E. 1991 - Changes in abundance of two percids, Perca fluviatilis and Gymnocephalus cernuus, along a productivity gradient: Relations to feeding strategies and competitive abilities - Can. J. Fish. Aquat. Sci. 48: 536-545.]Search in Google Scholar
[Bergman E., Greenberg L.A. 1994 - Competition between a planktivore, a benthivore, and a species with ontogenetic diet shifts - Ecology 75: 1233-1245.]Search in Google Scholar
[Boikova O.S. 1986 - Feeding of fish in Lake Glubokoe (USSR): Decrease in perch and ruff - Hydrobiologia 141: 95-111.10.1007/BF00007483]Search in Google Scholar
[Boron S. Kuklinska B. 1987 - Food of ruffe (Gymnocephalus cernuus L.) and Gudgeon (Gobio gobio) in Wloclawek dam Reservoir - Acta Ichthyol. Piscat. 17: 59-76.10.3750/AIP1987.17.1.05]Search in Google Scholar
[Bubinas A., Bukelskis E. 1998 - Freshwater community structure and analytical methods - Vilnius University Press, Vilnius, 120 p. (in Lithuanian).]Search in Google Scholar
[Dautartas J. 1983 - Some biological data on ruffe from the artificial Lake Kauno Marios - Graduation dissertation, Vilnius University, Vilnius, 37 p. (in Lithuanian).]Search in Google Scholar
[Hilbom R., Walters C.J. 1992 - Quantitative Fisheries Stock Assessment: Choice, Dynamics and Uncertainty New York: Chapman and Hall, 570 p.]Search in Google Scholar
[Jablonskis S. 1981 - Daily diet of bream and ruffe of the artificial Lake Kauno Marios - Graduation dissertation, Vilnius University, Vilnius, 36 p. (in Lithuanian).]Search in Google Scholar
[Jamet J.L., Desmolles F. 1994 - Growth, reproduction, and condition of roach (Rutilus rutilus (L.)), perch (Perca fluviatilis L.), and ruffe (Gymnocephalus cernuus (L.)) in eutrophic Lake Aydat (France) - Internat. Rev. Gesam. Hydrobiol. 78: 305-322.]Search in Google Scholar
[Johansson L. Persson L. 1986 - The fish community of temperate eutrophic lakes - In: Carbon Dynamics in Eutrophic, Temperate Lakes (Eds) B. Reimann, M. Sondergaard, Elsevier Science Publications, Amsterdam: 237-266.]Search in Google Scholar
[Johnsen P. 1965 - Studies on the distribution and food of the ruffe (Acerina cernua L.) in Denmark, with notes on other aspects - Meddelelser fra Danmarks Fiskeriog Havundersřgelser, New Series, 4: 137- 156.]Search in Google Scholar
[Jurev A.L. 2007 - Ekologija rib ozera Oron - Avtorefferat disertacij na soiskanije ucenoj ctepeni kandidata biologiceskich nauk. Irkutsk, 19 p. (in Russian).]Search in Google Scholar
[Kalas S. 1995 - The ecology of ruffe, Gymnocephalus cernuus (Pisces: Percidae) introduced to Mildevatn, western Norway - Environ. Biol. Fish. 42: 219-232.]Search in Google Scholar
[Kangur P., Kangur A., Kangur K., Mols T. 2003 - Condition and growth of ruffe Gymnocephalus cernuus (L.) in two large shallow lakes with different fish fauna and food recourse - Hydrobiologia 506-509: 435-441.10.1023/B:HYDR.0000008573.64863.e5]Search in Google Scholar
[Kublickas A. 1959 - Nutrition of benthophagous fish in the Curonian Lagoon - In: The Curonian Lagoon. Results of integrated research (Ed.) K. Jankevičius, Institute of Biology, Vilnius, Lithuania: 463-519 (in Russian).]Search in Google Scholar
[Kybartaite B. 1961 - Data on bream, perch, and ruffe biology and growth in Lake Drysviaty - Graduation dissertation, Vilnius University, Vilnius, 60 p. (in Lithuanian).]Search in Google Scholar
[Leach J.H., Johnson J.W., Entz B. 1977 - Responses of percid fishes and their habitats to eutrophication - J. Fish. Res. Board Can. 34: 1964-1971.10.1139/f77-263]Search in Google Scholar
[Lelek A. 1987 - The freshwater fishes of Europe: Threatened fishes of Europe - AULA-Verlag, Wiesbaden. 9: 343.]Search in Google Scholar
[Lind E.A. 1977 - A review of pikeperch (Stizostedion lucio-perca), Eurasian perch (Perca fluviatilis), and ruff (Gymnocephalus cernua) in Finland - J. Fish. Res. Board Can. 34: 1684-1695.]Search in Google Scholar
[Lorenzoni M., Pace R., Pedicillo G., Viali P., Carosi A. 2009 - Growth, catches and reproductive biology of ruffe Gymnocephalus cernuus in Lake Piediluco (Umbria, Italy) - Folia Zool. 58: 420-435.]Search in Google Scholar
[Mills C.A. Eloranta A. 1985 - The biology of Phoxinus phoxinus (L.) and other littoral zone fishes in Lake Konnevesi, Central Finland - Ann. Zool. Fenn. 22: 1-12.]Search in Google Scholar
[Ogle D.H., Selgeby J.H., Newman R.M., Henry M.G. 1995 - Diet and feeding periodicity of ruffe in the St. Louis River Estuary, Lake Superior - Trans. Am. Fish. Soc. 124: 356-369. gle D.H. 1998 - A synopsis of the biology and life history of ruffe - J. Great Lakes Res. 24: 170-185.]Search in Google Scholar
[Ogle D.H., Winfield I.J. 2009 - Ruffe length-weight relationships with a proposed standard weight equation - North Am. J. Fish. Manage. 29: 850-858.10.1577/M08-176.1]Search in Google Scholar
[Orlova E.L., Popova O.A. 1986 - Feeding of predatory fishes in relation to concentration of prey organisms - J. Ichthyol. 26: 72-79.]Search in Google Scholar
[Ricker W E. 1975 - Computation and interpretation of biological statistics of fish populations - Bull. Fish. Res. Board Can 191: 1-382.]Search in Google Scholar
[Sabaneev L.P. 1911 - Fishes of Russia - Moscow, 1062 p. (in Russian).]Search in Google Scholar
[Sierszen M.K., Keough J.R., Cagley C.A. 1996 - Trophic analysis of ruffe (Gymnocephalus cernuus) and white perch (Morone americana) in a Lake Superior coastal food web, using stable izotope techniques - J. Great Lakes Res. 22:436-443.]Search in Google Scholar
[Sparre P., Ursin E., Venema S.C. 1989 - Introduction to tropical fish stock assessment - Manual, FAO Fisheries Technical Paper Part 1, Rome: (306-1): 337.]Search in Google Scholar
[Subatavičiūtė D. 1960 - Biological research on ruffe from Lake Dysnai - Graduation dissertation, Vilnius University, 39 p. (in Lithuanian).]Search in Google Scholar
[Stakenas S., Kaupinis A., Skrupskelis K. 2007 - Research methodology of fish growth and growth classification -Scientific report, Hydrobiologists society of Lithuania, Vilnius (in Lithuanian).]Search in Google Scholar
[Universal Lithuanian Encyclopedia 2004 - Dis-Fatva, vol. V -Institute of Science and Encyclopaedia Publishing, Vilnius, 799 p. (in Lithuanian).]Search in Google Scholar
[Tarvainen M., Vuorio K., Sarvala J. 2008 - The diet of ruffe Gymnocephalus cernuus (L.) in northern lakes: new insights from stable isotope analyses - J. Fish Biol. 72: 1720-1735.10.1111/j.1095-8649.2008.01847.x]Search in Google Scholar
[Thoresson G. 1993 - Guidelines for coastal monitoring - fishery biology - Kustrapport 1: 1-35.]Search in Google Scholar
[Titova J. 2007 - Diet peculiarities of freshwater bream (Abramis brama) and ruffe (Gymnocephalus cernua) from the central part (near Vente Cape) of the Curonian Lagoon - Master thesis, Vilnius University, Vilnius, Lithuania (in Lithuanian).]Search in Google Scholar
[Virbickas J. 2000 - Fishes of Lithuania - Trys žvaigždutės, Vilnius, 192 p. (in Lithuanian).]Search in Google Scholar
[Virbickas J., Kesminas V., Repečka R., Balkuvienė G., Virbickas T., Stakėnas S. 1996 - The state and dynamics of fish population parameters (1993-1995) - Environmental monitoring 1993-1995, Vilnius (in Lithuanian).]Search in Google Scholar
[Virbickas J. 1988 - Structure and Development of Ichthyocenoses in the Lakes of Lithuania - Acta hydrobiologica, Lituanica. 8: 74-93.]Search in Google Scholar
