Hydrobiologia The International Journal on Limnology and Marine Sciences Contents Volume 380 Phytoplankton from the Southern Coastal Fringe of the Rio de la Plata (Buenos Aires, Argentina) by N. Gomez & D.E. Bauer Sinodiaptomus sarsi (Rylov, 1923) (Copepoda, Calanoida) in Turkey by E. Gunduz Interrelationships of fish and channel environmental conditions with aquatic macrophytes in an Argentine irrigation system by O.A. Fernandez, K.J. Murphy, A. Lopez Cazorla, M.R. Sabbatini, M.A. Lazzari, J.C.J. Domaniewski & J.H. Irigoyen Responses of benthic community metabolism to abiotic factors in a mountain river in southern Poland by T. Fleituch Size structure of aquatic communities: Lake Kinneret case by Y. Kamenir, P. Walline, B. Shteinman, M. Gophen & T. Bergstein Ben-Dan Food composition of the fish community in Lake Agmon by M. Gophen, Y. Yehuda, A. Malinkov & G. Degani Stoneflies (Plecoptera) in the diet of brook trout (Salvelinus fontinalis Mitchell) in Libby Creek, Wyoming, USA by R.M. Duffield & C.H. Nelson Microbial interactions responsible for dissolved DNA production in a hypereutrophic pond by N. Ishii, Z. Kawabata, S. Nakano, M.-G. Min & R. Takata Copepod equiproportional development: experimental confirmation of its independence of food supply level, and a conceptual model accounting for apparent exceptions by R.C. Hart Use of algal monocultures by larvae of Hydroptila waubesiana and Oxyethira pallida (Tri- choptera: Hydroptilidae) by J.B. Keiper, D.A. Casamatta & B.A. Foote 87-91 Diel dynamics of bacterioplankton activity in eutrophic shallow Lake Vortsjarv, Estonia by V. Kisand, T. Noges & P. Zingel 93-102 Comparative analysis of the late embryogenesis of Sida crystallina (O.F. Muller, 1776) and Diaphanosoma brachyurum (Lievin, 1848) (Crustacea: Branchiopoda: Ctenopoda) by A.A. Kotov & O.S. Boikova 103-125 Ilyocryptus smirnovi n. sp. (Branchiopoda, Anomopoda) — a new member of the species group Ilyocryptus brevidentatus s. lat. from Australia by A.A. Kotov & B.V. Timms 127-139 The effect of a man-made lake on the diet of the African electric fish Mormyrus rume Valenciennes, 1846 (Osteoglossiformes; Mormyridae) by P.E. Kouamélan, G.G. Teugels, G. Gourene, F. Ollevier & D.F.E. Thys van den Audenaerde 141-151 Population dynamics of Corbicula fluminea (Bivalvia) in the Parana River Delta (Argentina) by D. Cataldo & D. Boltovskoy 153-163 Influence of freshwater and terrigenous material on nutrients, bacteria and phytoplankton in a high island lagoon: Mayotte, Comoro Archipelago, Indian Ocean by E. Vacelet, A. Arnoux, B.A. Thomassin & M. Travers 165-178 Implications of an invertebrate predator’s (Bythotrephes cederstroemi) atypical effects on a pelagic zooplankton community by K.L. Schulz & P.M. Yurista 179-193 Trophic interactions between two tropical omnivorous fishes, Oreochromis shiranus and Bar- bus paludinosus: feeding selectivities and food web responses by N.S. Mattson 195-207 Midsummer zooplankton assemblages in four types of wetlands in the Upper Midwest, USA by J.R. Beaver, A.M. Miller-Lemke & J.K. Acton 209-220 Author Index