Hidrológiai Közlöny 2002 (82. évfolyam)

XLIII. Hidrobiológus Napok: "Vizeink ökológiai állapota: természetvédelem, vízhasznosítás" Tihany, 2001. október 3-5.

155 G.-Tóth, L. (1992): A hálós Zooplankton respirációs elektron transzport rendszer (ETS)-aktivitása és szénforgalma a Balatonban. - In: Bíró, P. (Szerk.):/00 éves a Balaton-kutatás. REPROPRINT, Nemesvámos: 172-179. Kelleher, B, van der Velde, G., Wittmann, K. J„ Faasse, M. A. and bij de Vaate, A (1999): Current status of the freshwater Mysidae in the Netherlands, with records of Limnomysis benedeni Czerniavsky, 1882, a Pontocaspian species in Dutch Rhine Branches. - Bull. Zo61. Mus Vol. 16 no. 13 LeCren, ED and R.H. McConnel (1980): The functioning of freshwater ecosystems -1BP22, Cambridge University Press 1-588. Muskó, 1. B. (1992): A Corophium curvispinum G. O. Sars (Crustacea: Amphipoda) életciklusa balatoni hinárosban. -Hidrol. Közi 72/5-6: 300-305. Roast. S. D.. Thompson. R. S.. Widdows. J. and Jones M B. (1998): Mysids and environmental monitoring: a case for their use in estuaries. - Mar. Freshwater Res. 49: 827-832. Szalontai, K., B Muskó, I. és G.-Tóth, L. (2000): A balatoni Limnomysis benedeni Czem. (Crustacea: Mysidacea) testhossz-testtömeg összefüggése és oxigénfogyasztása. - Hidrol. Közi 80/5: 348-349 Tölg, 1. (1959): Hogyan táplálkozik a balatoni süllőivadék? - Halászat, 6/5: 99. Winberg, G. G. (ed.) (1971): Symbols, units and conversion factors in studies of fresh water productivity. IBP Central Office, 7 Marylebone Road, London NW1 5HB Winkler, L. (1888): Die Bestimmung des in Wasser gelösten Sauerstoff. -Ber. Dtsch. Chem. Ges. 21: 2843-2854. Wittmann, K. J. (1995): Zur Einwanderung potamophiler Malacostraca in die obere Donau: Limnomysis benedeni (Mysidacea), Corophium curvispinum (Amphipoda) und Atyaephyra desmaresti (Decapoda). - Lauterbornia H 20: 77-85. Wooldridge, T.H (2000): Limnomysis benedeni Czerniavsky: a Pontocaspian mysid new for the freshwaters of France (Crustacea, Mysidacea). - Vie et milieu Paris [Vie Milieu], vol. 50. no 2. pp 117122. 4500 4000 3500 "E 3000 I 2500 -3 2000 5)1500 w 1000 500 0 a. Balatonalmádi JUJ 00.06.09. 00.07.17. 00.10.13. 35000 30000 25000 J20000 •§ 15000 JflOOOO 5000 b. Tihany fv'At JEHL 1 00.07.20. 00.10.13 c. Szigliget ELU 6000 5000 "g 4000 N 3000 •3 o J°2000 1000 0 d. Keszthely 00.05.30. 00.07.18. 00.10.12. 00.05.30. 00.07.018. 00.10.12. 2. ábra (a-d): A Limnomysis benedeni Czern. populációjának összetétele és sűrűsége a Balaton 4 különböző trofitású helyén (Density and size distribution of the populations of Limnomysis benedeni Czern. on 4 different sampling places in Lake Balaton.) Matter-energy flux of Limnomysis benedeni Czern. (Crustacea: Mysidacea) living in Lake Balaton (Hungary) Krisztina Szalontai, László G.-Tóth and Ilona B. Muskó Balaton Limnological Research Institute of the Hungarian Academy of Sciences, H-8237 Tihany, Hungary Abstract: For the determination of population structure we collected the animals at Tihany along the vertical shore from July 2000 until July 2001 and we took animals also at 4 different sampling stations representing different trophic status of the lake from submerged macrophytes The population density ranged from 25 to 826 ind m'

2 in the paved shore line, from 275 to 29195 ind. m"

2 in the macrovegetation The biomass ranged from 0.655 to 26 mg dry weigth m"

2 in paved shore line, from 111.62 to 9214 mg dry weigth m"

2 in macrovegetation. From the population density, the body length-dry body mass relationship and the specific oxygen consumption rates we calculated the biomass and the daily respiration carbon loss of the populations, which ranged from 1.66 to 4830 pgC m"

2 day' in the littoral zone, from 9900 to 427400 pgC m"

2 day'

1 in the shore line, and in the reed-grass, respectively These values are equivalent with minimal food request of the animals From the specific oxygen consumption rates we calculated that L. benedeni oxidizes 0.82-34.3% of own carbon content a day depends on temperature and body length. We established L. benedeni prefers the macrovegetation to the paved shore line. We can found ovigerous females from early May to November. The individuals reach the maximum values late summer, when the females born in spring become mature. Keywords: Limnomysis benedeni Czern.

, Balaton, oxygen consumption, biomass, (daily) respiration carbon loss