L. Forró szerk.: Miscellanea Zoologica Hungarica 7. 1992 (Budapest, 1992)

Muskó, I. B.: Amphipoda species found in Lake Balaton since 1897

% 1963 F"ig. 1. Percentage distribution of the three amphipod species at the different stations in 1893 and 1895. C. c. = Corophium curvispinum, D. h. = Dikerogammarus haemobaphes, M - Myriophyllum spicatum. P = Potamogeton perfoliatus, S = stony shore zone, 1, 2, 3 = same sampling stands in both years, the 4th sampling stand of the stony shore was near to the 1st sampling stand of macrovegetation, the 5th sampling stand of stony shore near to the 2nd sampling stand of macrovegetation, while the 6th of the stony shore was near to the 3rd sampling stand of macrovegetation. all of them situated on the eastern side of the Tihany peninsula lower than at the rest of the stands (5 in Keszthely, the maximum being 574 at Balatonmária) (Fig. 2). In order to study the life history of amphipods, we collected fortnightly samples from M. spicatum in the Bozsai-Bay (beside the Tihany peninsula) from May till December 1986 and from July to the end of August in 1987. In 1987 we did not find any submerged macrophytes in the lake either in May or in June because of the cold weather during spring that year. Egg bearing females of C. curvispinum were present in the population from May to the end of October, and those of D. I ind./

g macrophre dry wH [-300 •200 •100 0 Fig. 2. Abundance of amphipods in ind./g macrophyte dry weight on the different sampling stands. 1 = Alsóörs, 2 = Balatonudvari, 3 = Révfülöp, 4 = Szigliget, 5 = Keszthely, 6 = Balatonmária, 7 = Fonyód, 8 « Boglárlelle, 9 = Szántód, 10 = Zamárdi