Effects of metal speciation on growth of phytoplankton with special reference to iron H. De Haan OriginalPaper Pages: 85 - 94
Contents of Cd, Fe, Mn and Zn in the tissue ofKatelysia hiantina collected from Tolo Harbour, an almost land-locked sea M. H. WongK. C. Au OriginalPaper Pages: 95 - 101
Effect of leaf leachates ofPolyalthia longifolia on the growth and nitrogen fixation ofAzolla pinnata Abhijit SinhababuDebiprasad Kushari OriginalPaper Pages: 103 - 108
A comparison of algal periphyton composition on eleven species of submerged macrophytes Eva PipG. G. C. Robinson OriginalPaper Pages: 109 - 118
A survey of the distribution of chironomidae (Diptera, Insecta) of the river rhine by sampling pupal exuviae R. S. WilsonS. E. Wilson OriginalPaper Pages: 119 - 132
The longitudinal distribution of macroinvertebrates and fish in a lower Niger delta river (River Sombreiro) in Nigeria C. S. Nwadiaro OriginalPaper Pages: 133 - 140
A bibliography of publications for identification of freshwater organisms in the Netherlands Harry H. Tolkamp OriginalPaper Pages: 141 - 155
Effects of fish upon submerged vegetation Erik H. Ten WinkelJohn T. Meulemans BriefCommunication Pages: 157 - 158
Preliminary data on size composition and settlement ofDreissena polymorpha (Pallas) (Mollusca: Bivalvia) in lakes differing in trophic state Jaap DorgeloMaarten Gorter OriginalPaper Pages: 159 - 163