1. Ecological life histories of the three aquatic nuisance plants, Myriophyllum spicatum, Potamogeton crispus and Elodea canadensis

   • Stanley A. Nichols
   • Byron H. Shaw

   OriginalPaper Pages: 3 - 21

2. The role of nitrogen and phosphorus in the development of Cladophora glomerata (L.) Kutzing in the Manawatu River, New Zealand

   • M. C. Freeman

   OriginalPaper Pages: 23 - 30

3. A new species of Pythium from Algerian waters

   • Paul Bernard

   OriginalPaper Pages: 31 - 38

4. Stream type diversity in the Atlantic lowland of the Jureia area (Subtropical Brazil)

   • F. D. Por

   OriginalPaper Pages: 39 - 45

5. Field assessment of the quality of phytoplanktonic food available to Daphnia and Bosmina

   • Orlando Sarnelle

   OriginalPaper Pages: 47 - 56

6. Studies on decomposition of two species of Salvina

   • K. P. Sharma
   • P. K. Goel

   OriginalPaper Pages: 57 - 61

7. Evaluation of statistical methods for avoidance data of schooling fish

   • S. I. Hartwell
   • H. J. Jin
   • J. Cairns Jr.

   OriginalPaper Pages: 63 - 76

8. Behaviour of drifting insect larvae

   • Christian Otto
   • Per Sjöström

   OriginalPaper Pages: 77 - 86

9. Spatial patterns and feeding of meiobenthic harpacticoid copepods in relation to resident microbial flora

   • Alan W. Decho
   • Richard W. Castenholz

   OriginalPaper Pages: 87 - 96