1. Surface-hyporheic interactions in a Sonoran Desert stream: hydrologic exchange and diel periodicity

   • H. Maurice Valett

   OriginalPaper Pages: 133 - 144

2. New species of Halicyclops (Copepoda Cyclopidae) from the United States of America

   • Carlos Eduardo Falavigna da Rocha
   • Christine C. Hakenkamp

   OriginalPaper Pages: 145 - 156

3. Patterns of fish species richness in the Seine River basin, France

   • Thierry Oberdorff
   • Eric Guilbert
   • Jean-Claude Lucchetta

   OriginalPaper Pages: 157 - 167

4. Biofilms on submerged River Red Gum (Eucalyptus camaldulensis Dehnh. Myrtaceae) wood in billabongs: an analysis of bacterial assemblages using phospholipid profiles

   • Oliver Scholz
   • Paul I. Boon

   OriginalPaper Pages: 169 - 178

5. Variation in the summer diet of age-0 brown trout in a regulated mountain stream

   • Wayne A. Hubert
   • Douglas D. Harris
   • Howard A. Rhodes

   OriginalPaper Pages: 179 - 185

6. Anthessius kimjensis, a new species of Anthessiidae (Copepoda; Poecilostomatoida) associated with the pelecypod Solen grandis Dunker in Korea

   • Hae-Lip Suh

   OriginalPaper Pages: 187 - 193

7. Effects of sewage disposal into the White Nile on the plankton community

   • Eisa M. Abdellatif
   • Osman M. Ali
   • Betty M. Nyonje

   OriginalPaper Pages: 195 - 201

8. Spread of Elodea canadensis in Lake Baikal

   • O. M. Kozhova
   • L. A. lzhboldina

   OriginalPaper Pages: 203 - 211

9. Book reviews

   BookReview Pages: 213 - 215

10. Volume 259 (1993), author index

    Legacy Pages: 217 - 217

11. Conference announcement and first call for abstracts/papers

    Announcement Pages: 218 - 218

12. Volume 259 (1993), contents

    Legacy Pages: 219 - 219