hydrobiologia volume 338, nos. 1-3, november 8, 1996 Biology of Lake Peipsi Guest Editors T. Timm & T. Néges Preface General description of Lake Peipsi-Pihkva by T. Néges, J. Haberman, A. Jaani, R. Laugaste, S. Lokk, A. Maemets, P. Néges, E. Pihu, H. Starast, T. Timm & T. Virro Hydrology and water balance of Lake Peipsi by A. Jaani Water quality of rivers in the drainage basin of Lake Peipsi by E. Loigu & U. Leisk The hydrochemical state of Lake Peipsi-Pihkva by T. Mls, H. Starast, A. Milius & A. Lindpere Phytoplankton of Lake Peipsi-Pihkva: species composition, biomass and seasonal dynamics by R. Laugaste, V. Jastremskij & |. Ott 49-62 Diatoms of Lake Peipsi-Pihkva: a floristic and ecological review by R. Laugaste & M. Pork 63-76 Primary production of Lake Peipsi-Pihkva by P. Néges, T. Noges & V.V. Jastremskij 77-89 Phytoplankton pigments and adenosine triphosphate (ATP) in Lake Peipsi-Pihkva by T. Néges 91-104 Zooplankton of Lake Peipsi-Pihkva in 1909-1987 by A. Maemets, M. Timm & T. Néges 105-112 Contemporary state of the zooplankton in Lake Peipsi by J. Haberman 113-123 Taxonomic composition of rotifers in Lake Peipsi by T. Virro 125-132 Microbiological characteristics and sanitary status of Lake Peipsi-Pihkva and its inflows in 1980s by S. Lokk & V. Kisand 133-138 Macrozoobenthos of Lake Peipsi-Pihkva: taxonomical composition, abundance, biomass, and their relations to some ecological parameters by T. Timm, K. Kangur, H. Timm & V. Timm 139-154 Macrozoobenthos of Lake Peipsi-Pihkva: long-term biomass changes by T. Timm, K. Kangur, H. Timm & V. Timm 155-162 Fishes, their biology and fisheries management in Lake Peipsi by E. Pihu 163-172 On the biology of bream, Abramis brama (L.) in Lake Peipsi in 1994 by P. Kangur 173-177 The condition, length and age distribution of pikeperch, Stizostedion lucioperca (L.) in Lake Peipsi by A. Kangur & P. Kangur On polynuclear aromatic hydrocarbons contamination levels in the ecosystem of Lake Peipsi in the 1970s—1980s by M. Trapido & |. Veldre 185-190 Precursors of carcinogenic N-nitroso compounds in Lake Peipsi by I. Veldre & S. Karlova 191-198 Author index