1. Particle organic carbon analysis: apparatus and some results

   • Adrie Hulsmann
   • Pieter Hengst

   OriginalPaper 01 December 1980 Pages: 135 - 141

2. Effects of laundry wastewater on benthic algae in ditches in the Netherlands

   • S. P. Klapwijk

   OriginalPaper 01 December 1980 Pages: 142 - 151

3. Physiology of some submersed aquatic angiosperms: effects of heavy metals

   • Sasadhar Jana
   • Monojit A. Choudhuri

   OriginalPaper 01 December 1980 Pages: 152 - 157

4. Thermal stratification and deep man-made lakes: An evaluation of a predictive model

   • A. N. Van Breemen
   • G. J. G. Kok

   OriginalPaper 01 December 1980 Pages: 158 - 168

5. Fouling in Lake Timsah (Egypt)

   • A. F. A. Ghobashy
   • M. M. El Komy

   OriginalPaper 01 December 1980 Pages: 169 - 178

6. Fouling in the southern region of the Suez Canal

   • A. F. A. Ghobashy
   • M. M. El Komy

   OriginalPaper 01 December 1980 Pages: 179 - 185

7. On the distribution of ‘gonionemus vertens’ a. Agassiz (Hydrozoa, Limnomedusae), a new species in the eelgrass beds of Lake Grevelingen (S.W. Netherlands)

   • C. Bakker

   OriginalPaper 01 December 1980 Pages: 186 - 195

8. Avoidance of macrophytes and additional notes on avoidance of the shore by ‘Acanthodiaptomus denticornis’ (Wierzejski, 1887) from Lake Pavin (Auvergne, France)

   • Jaap Dorgelo
   • Kees Koning

   OriginalPaper 01 December 1980 Pages: 196 - 208

9. The presence of caddis flies in the Netherlands and their role in the aquatic system

   • L. W. G. Higler

   OriginalPaper 01 December 1980 Pages: 209 - 212

10. In vivo fluorescence measurements of phytoplankton

    • H. Vrijhof

    BriefCommunication 01 December 1980 Pages: 213 - 215

11. Dynamics and metabolism of the benthos of the Wadden Sea

    • P. A. W. J. De Wilde

    BriefCommunication 01 December 1980 Pages: 216 - 218

12. The impact of acidification on diatoms and chemistry of Dutch moorland pools

    • Herman van Dam
    • Gillis Suurmond
    • Cajo Ter Braak

    Report 01 December 1980 Pages: 219 - 219

13. Diel patterns of phytoplankton productivity in Lake Vechten

    • W. Opstelten

    OriginalPaper 01 December 1980 Pages: 219 - 220

14. The distribution of oligochaetes in the Haringvliet-Hollands Diep (Delta region of the Netherlands) before and after the closure in 1970

    • Piet F. M. Verdonschot

    Report 01 December 1980 Pages: 221 - 221

15. Ecological investigations in sublittoral biocenoses on hard substrates

    • H. W. Waardenburg

    Report 01 December 1980 Pages: 221 - 222

16. The role of the invertebrate fauna in the biological assessment of water quality

    • A. Mol

    OriginalPaper 01 December 1980 Pages: 222 - 223

17. The pelagic system in the photic zone of the tropical Atlantic

    • Martien A. Baars

    OriginalPaper 01 December 1980 Pages: 223 - 224

18. Zooplankton research in the North Sea

    • H. G. Fransz

    Report 01 December 1980 Pages: 224 - 225

19. Breeding pelagic copepods

    • W. C. M. Klein Breteler

    OriginalPaper 01 December 1980 Pages: 225 - 225

20. A review of data on production and import of organic carbon in the western Wadden Sea

    • C. C. Cadee

    ReviewPaper 01 December 1980 Pages: 225 - 226

21. Publications

    • Jaap Dorgelo

    BookReview 01 December 1980 Pages: 226 - 227

22. Congresses

    Announcement 01 December 1980 Pages: 227 - 227

23. In memoriam H. Van Wijk

    • Jaap Dorgelo

    Miscellaneous 01 December 1980 Pages: 228 - 228

24. In memoriam Dr. K.F. Vaas

    • P. H. Nienhuis
    • C. Bakker

    Miscellaneous 01 December 1980 Pages: 228 - 231