Colorimetric determination of sulphate in freshwater with a chromate reagent H. L. GoltermanI. M. De Graaf Bierbrauwer-Würtz OriginalPaper Pages: 111 - 115
Modification of an index of biotic integrity based on fish assemblages to characterize rivers of the Seine Basin, France T. OberdorffR. M. Hughes OriginalPaper Pages: 117 - 130
Diversity, distribution, and seasonal abundance of Ephemeroptera in streams of Meghalaya State, India Abhik GuptaR. George Michael OriginalPaper Pages: 131 - 139
Phytoplankton and physical-chemical features of Tavropos Reservoir, Greece M. Moustaka-GouniG. Nikolaidis OriginalPaper Pages: 141 - 149
Direct observation of toxic effects of cyanobacterial extracellular products on Daphnia Donal J. ForsythJames F. HaneyMark R. James OriginalPaper Pages: 151 - 155
Feeding patterns of four macroinvertebrate taxa in the headwaters of the Buffalo River, eastern Cape Carolyn G. PalmerJay H. O'Keeffe OriginalPaper Pages: 157 - 173