1. Index Autorum

   Legacy Pages: ii - ii

2. Contents

   Legacy Pages: iii - iv

3. Seasonal variations in the density of a small West African lake

   • Austin B. M. Egbore

   OriginalPaper Pages: 195 - 203

4. An evaluation of Secchi disk visibility for estimating plankton density in Fish ponds

   • Guadiosa Almazan
   • Claude E. Boyd

   OriginalPaper Pages: 205 - 208

5. Les levures dans les eaux de la Moselle

   • F. Hinzelin
   • P. Lectard

   OriginalPaper Pages: 209 - 224

6. Distribution of certain species of utricularia in relation to their habitats in and around Jamshedpur, India

   • U. N. Jha
   • M. Jha
   • Meena Kumari

   OriginalPaper Pages: 225 - 228

7. Changes in the aquatic flora along a stretch of the river Umeälven, N. Sweden, following hydro-electric exploitation

   • Christer Nilsson

   OriginalPaper Pages: 229 - 236

8. Repartition spatio-temporelle, biomasse et production des populations zooplanctoniques du lac d'aydat en periode estivale

   • Nicole Lair

   OriginalPaper Pages: 237 - 256

9. Determining fish avoidance of polluted water

   • Stephan R. Larrick
   • K. L. Dickson
   • John Cairns Jr.

   OriginalPaper Pages: 257 - 265

10. Laboratory studies on the direct effect of temperature on the freshwater vector snail, Indoplanorbis exustus (Deshyes)

    • D. P. Vaidya
    • R. Nagabhushanam

    OriginalPaper Pages: 267 - 271

11. A note on the nutrition of Stylaria lacustris (Oligochaeta: Naididae)

    • B. Streit

    OriginalPaper Pages: 273 - 276

12. The distribution of Achlya americana (Saprolegniales) in different aquatic habitat at Jabalpur, India

    • S. K. Hasija
    • S. Batra

    OriginalPaper Pages: 277 - 279