1. Editorial

   • Jaap Dorgelo

   EditorialNotes Pages: II - II

2. The hemoglobin concentration ofChironomus cf.Plumosus l. (Diptera: Chironomidae) larvae from two lentic habitats

   • Luc Int Panis
   • Boudewijn Goddeeris
   • Rudolf Verheyen

   OriginalPaper Pages: 1 - 4

3. Changes in the amphipod fauna (crustacea) of the Rhine, Meuse and Scheldt estuary due to the ’delta plan’ coastal engineering works

   • Dirk Platvoet
   • Sjouk Pinkster

   OriginalPaper Pages: 5 - 30

4. Sublittoral macrozoobenthic assemblages in the enclosed sediment-polluted Rhine-Meuse Delta; their relationship to environmental conditions

   • H. Smit
   • H. C. Reinhold-Dudok Van Heel
   • S. M. Wiersma

   OriginalPaper Pages: 31 - 47

5. On the use of split moving window analysis for boundary detection in ordered dataseries from benthic communities

   • Luc Int Panis
   • Rudolf F. Verheyen

   OriginalPaper Pages: 49 - 53

6. A model for calculation of diffuse light attenuation (PAR) and Secchi depth

   • H. Buiteveld

   OriginalPaper Pages: 55 - 65

7. Modelling nutrient cycles in relation to food web structure in a biomanipulated shallow lake

   • J. H. Janse
   • E. Van Donk
   • R. D. Gulati

   OriginalPaper Pages: 67 - 79

8. Biomanipulation in the Duinigermeer; first results

   • J. A. Van Berkum
   • M. Klinge
   • M. P. Grimm

   OriginalPaper Pages: 81 - 90

9. Development of fish communities in lakes after biomanipulation

   • M. -L. Meijer
   • E. H. R. R. Lammens
   • M. P. Grimm

   OriginalPaper Pages: 91 - 101

10. Phytoplankton dynamics in the River Meuse as affected by pollution

    • D. M. J. Tubbing
    • D. De Zwart
    • T. Burger-Wiersma

    OriginalPaper Pages: 103 - 116

11. Occurrence of the Rhodophycean algaThorea ramosissima Bory in the River Meuse

    • C. Den Hartog
    • G. M. Lokhorst

    Short Communication Pages: 117 - 120

12. One decade of benthic macroinvertebrate biomonitoring in the River Meuse

    • Henk A. M. Ketelaars
    • Nicole M. L. H. F. Frantzen

    OriginalPaper Pages: 121 - 133

13. PCB contamination of the common barbel,Barbus barbus (pisces, cyprinidae), in the River Meuse in relation to hepatic monooxygenase activity and ultrastructural liver change

    • J. L. Hugula
    • J. C. Philippart
    • J. P. Thome

    OriginalPaper Pages: 135 - 145

14. Are zebra mussels restricted by toxicant levels in the River Meuse? a review

    • Michiel H. S. Kraak

    ReviewPaper Pages: 147 - 150