1. Cladocera and free-living Copepoda from the Fouta Djalon and adjacent mountain areas in West Africa

   • Henri J. Dumont

   OriginalPaper Pages: 97 - 115

2. The ecological energetics of Amoeba proteus (Protozoa)

   • Andrew Rogerson

   OriginalPaper Pages: 117 - 128

3. Age, growth and reproduction of a population of spined loach, Cobitis taenia (L.)

   • P. W. J. Robotham

   OriginalPaper Pages: 129 - 136

4. The toxicity of crude oil for the marine alga Skeletonema costatum (Greville) Cleve in relation to nutrient limitation

   • Michael Karydis

   OriginalPaper Pages: 137 - 143

5. Macroinvertebrate drift in the upper Wye catchment, Wales

   • R. J. Hemsworth
   • M. P. Brooker

   OriginalPaper Pages: 145 - 155

6. An efficient, inexpensive elutriator design for separating benthos from sediment samples

   • William P. Magdych

   OriginalPaper Pages: 157 - 159

7. Seasonal change of protozoa and micrometazoa in a small pond with leaf litter supply

   • Harumi Hatano
   • Yasunori Watanabe

   OriginalPaper Pages: 161 - 174

8. Effects of water hardness and diet on productivity of Daphnia magna Straus. in laboratory culture

   • M. A. Lewis
   • A. W. Maki

   OriginalPaper Pages: 175 - 179

9. Seasonal dynamics and the structure of colonies of Proterospongia skujae Bourrelly

   • Milan Ertl

   OriginalPaper Pages: 181 - 184

10. The effects of low pH on the respiration of Daphnia magna Straus.

    • M. R. Alibone
    • P. Fair

    OriginalPaper Pages: 185 - 188

11. Announcement

    Announcement Pages: 189 - 189