1. Water chemistry and algal vegetation of streams in the Asir Mountains, Saudi Arabia

   • B. A. Whitton
   • Talat M. Khoja
   • Ibrahim A. Arif

   OriginalPaper Pages: 97 - 106

2. Secondary production of an intertidal mussel (Mytilus edulis L.) population in the Eastern Scheldt (S.W. Netherlands)

   • Johan A. Craeymeersch
   • Peter M. J. Herman
   • Patrick M. Meire

   OriginalPaper Pages: 107 - 115

3. Uptake and tissue distribution of manganese in the white sucker (Catostomus commersoni) under conditions of low pH

   • Leah I. Bendell-Young
   • Harold H. Harvey

   OriginalPaper Pages: 117 - 125

4. Effects of water quality and season on diatom community structure in the Damour River, Lebanon

   • Lorin E. Squires
   • Nada Sinnu Saoud

   OriginalPaper Pages: 127 - 141

5. Drift behaviour and microhabitat selection in the preimaginal stages of Simulium chutteri (Diptera Simuliidae)

   • F. C. de Moor
   • F. M. Chutter
   • I. J. de Moor

   OriginalPaper Pages: 143 - 154

6. Growth of Corbicula fluminea (bivalvia) fed artificial and algal diets

   • Christopher Foe
   • Allen Knight

   OriginalPaper Pages: 155 - 164

7. Optical properties of some freshwater phytoplanktonic algae

   • R. J. Davies-Colley
   • R. D. Pridmore
   • J. E. Hewitt

   OriginalPaper Pages: 165 - 178

8. The genus Paradorylaimus Andrássy, 1969 (Dorylaimoidea: Nematoda)

   • P. A. A. Loof
   • A. Coomans

   OriginalPaper Pages: 179 - 186

9. Book reviews

   BookReview Pages: 187 - 191