Freshwater ecology: changes, requirements, and future demands R. G. Wetzel REVIEW ARTICLE Pages: 3 - 9
Urea degradation by picophytoplankton in the euphotic zone of Lake Biwa O. MitamuraM. KawashimaH. Maeda RESEARCH PAPER Pages: 19 - 26
Genetic diversity of the submerged macrophyte Hydrilla verticillata (L. f.) Royle in a river system in Japan T. NakamuraY. Kadono RESEARCH PAPER Pages: 27 - 31
Limnological characteristics of subtropical Lakes Phewa, Begnas, and Rupa in Pokhara Valley, Nepal A. K. Rai RESEARCH PAPER Pages: 33 - 46
Reproductive behavior and morphology of Paraleptophlebia spinosa (Ephemeroptera: Leptophlebiidae): implications of variation in copula duration Y. Takemon RESEARCH PAPER Pages: 47 - 56
Characteristics of fluctuations in salinity and water quality in brackish Lake Obuchi S. UedaH. KawabataK. Kondo NOTE Pages: 57 - 62
Change in the water quality in Lake Ohnuma, Hokkaido, Japan: a comparison of 1977 and 1996 T. YoshimuraI. KudoK. Matsunaga NOTE Pages: 63 - 68
