1. Habits and relative population densities of some hydrophilids in California rice fields

   • Frank G. Zalom
   • Albert A. Grigarick
   • Michael O. Way

   OriginalPaper Pages: 195 - 200

2. Some ecological aspects of Lake Qarun, Fayoum, Egypt. Part II. Production of plankton and benthic organisms

   • S. A. Abdel-Malek
   • M. M. Ishak

   OriginalPaper Pages: 201 - 208

3. La production primaire des eaux du golfe San Jose (Peninsule Valdes, Argentine). I. Parametres physiques et teneurs en sels mineraux

   • L. J. Charpy
   • C. J. Charpy-Roubaud
   • M. J. Pizarro

   OriginalPaper Pages: 209 - 214

4. La production primaire des eaux du golfe San Jose. II. Populations phytoplanctoniques et composition du seston

   • L. J. Charpy
   • C. J. Charpy-Roubaud

   OriginalPaper Pages: 215 - 224

5. La production primaire des eaux du golfe San Jose (Peninsule Valdes, Argentine). III. Estimation de la production phytoplanctonique annuelle

   • L. J. Charpy
   • C. J. Charpy-Roubaud

   OriginalPaper Pages: 225 - 229

6. Growth characteristics of the heterotrophic bacterial population of water and bottom sediments in tanks under different trophic conditions

   • B. B. Jana
   • G. N. Patel
   • U. K. De

   OriginalPaper Pages: 231 - 239

7. Nutrient translocation from green algal symbionts to the freshwater sponge Ephydatia fluviatilis

   • Clive R. Wilkinson

   OriginalPaper Pages: 241 - 250

8. Invertebrate drift lost to the sea during low flow conditions in a small coastal stream in Western Canada

   • D. Dudley Williams

   OriginalPaper Pages: 251 - 254

9. Studies on predation on mosquito larvae by the fish macropodus cupanus

   • S. Mathayan
   • J. Muthukrishnan
   • G. A. Heleenal

   OriginalPaper Pages: 255 - 258

10. Pollution effects on the phytoplankton-zooplankton relationships in an inshore environment

    • Maria Moraïtou-Apostolopoulou
    • Lydia Ignatiades

    OriginalPaper Pages: 259 - 266

11. Role of the lateral lobes in the control of certain physiological and biochemical processes in Bulinus truncatus (Gastropoda, Pulmonata)

    • A. M. Mohamed
    • W. P. M. Geraerts

    OriginalPaper Pages: 267 - 271

12. Observations on some common parasites of Bagrus docmac Forskahl (pisces: siluroidea) of lake Victoria

    • Godfrey B. Mbahinzireki

    OriginalPaper Pages: 273 - 280

13. Thermoregulatory behavior of juvenile cromileptes altivelis (serranidae), a tropical marine fish

    • William Wallace Reynolds
    • Martha Elizabeth Casterlin

    OriginalPaper Pages: 281 - 282

14. Studies on osmotic balance and its control in the freshwater mollusc parreysia corrugata

    • V. S. Lomte
    • S. N. Barhanpurkar

    OriginalPaper Pages: 283 - 285