1. Periphyton in the Volta Lake. I. Seasonal changes on the trunks of flooded trees

   • E. K. Obeng-Asamoa
   • D. M. John
   • H. N. Appler

   OriginalPaper 01 January 1981 Pages: 191 - 200

2. Occurrence, distribution and seasonal periodicity of some aquatic fungi of Sat-Tal (Nainital), India

   • G. S. Mer
   • S. C. Sati
   • R. D. Khulbe

   OriginalPaper 01 January 1981 Pages: 201 - 205

3. Periphyton in the Volta Lake. II. Seasonal changes on wooden blocks with depth

   • D. M. John
   • E. K. Obeng-Asamoa
   • H. N. Appler

   OriginalPaper 01 January 1981 Pages: 207 - 215

4. Relations entre le benthos, la derive, le rythme alimentaire et le taux de consommation de truites communes (S. trutta L.) en canal experimental

   • A. Neveu

   OriginalPaper 01 January 1981 Pages: 217 - 228

5. Influence de la concentration en ions H₂PO₄ ⁻ du milieu sur la croissance et la composition minerale de deux characees

   • René Strauss

   OriginalPaper 01 January 1981 Pages: 229 - 232

6. The influence of flatworm predation on zooplankton inhabiting small ponds

   • Edward J. Maly
   • Stephen Schoenholtz
   • Michael T. Arts

   OriginalPaper 01 January 1981 Pages: 233 - 240

7. Toxicite a long terme d'un insecticide organophosphore (fenthion) chez le mollusque Lymnaea stagnalis L.

   • Jacqueline Seugé
   • Roger Bluzat

   OriginalPaper 01 January 1981 Pages: 241 - 248

8. Contributions to the Rotifer fauna of Panjab State, India. I. Family Brachionidae

   • B. K. Sharma

   OriginalPaper 01 January 1981 Pages: 249 - 253

9. Changes in flora down a stream showing a zinc gradient

   • P. J. Say
   • B. A. Whitton

   OriginalPaper 01 January 1981 Pages: 255 - 262

10. Decomposition and microbial colonization of leaves in a stream modified by coal ash effluent

    • Anne M. Forbes
    • John J. Magnuson

    OriginalPaper 01 January 1981 Pages: 263 - 267

11. Fresh water chytrids from Varanasi (India). III. Some new records

    • R. Dayal
    • Usha Kirin

    OriginalPaper 01 January 1981 Pages: 269 - 273

12. Libri novi

    • H. J. Dumont
    • Frank Fiers
    • De Fonseca

    BookReview 01 January 1981 Pages: 275 - 277