1. Etude écologique comparée des populations d'ostracodes dans deux étangs de pisciculture en haute Belgique

   • D. Pierre

   OriginalPaper 01 December 1973 Pages: 273 - 284

2. Filamentous organisms in activated sludge

   • Alena Sladká
   • Vlasta Ottová

   OriginalPaper 01 December 1973 Pages: 285 - 299

3. Migration of galaxias maculatus (Jenyns) (galaxiidae, pisces) in Valdivia Estuary, Chile

   • Campos C. Hugo

   OriginalPaper 01 December 1973 Pages: 301 - 312

4. The limnology of a Thermal Lake: Lake Rotowhero, New Zealand: I. General description and water chemistry

   • R. H. S. McColl
   • D. J. Forsyth

   OriginalPaper 01 December 1973 Pages: 313 - 332

5. Diatom Succession and Interaction in Littoral Periphyton and Plankton

   • S. D. Brown
   • A. P. Austin

   OriginalPaper 01 December 1973 Pages: 333 - 356

6. Protease and Amylase in the digestive tract ofBarbus paludinosus

   • Alan Cockson
   • David Bourn

   OriginalPaper 01 December 1973 Pages: 357 - 363

7. Observations on a breeding pair of Tilapia rendalli rendalli Boulenger 1896 in an experimental tank at Lake Kariba Fisheries Research Institute

   • D. H. S. Kenmuir

   OriginalPaper 01 December 1973 Pages: 365 - 370

8. Observations On Nuclear Division in vegetative hyphae of aquatic fungi

   • Ram Dayal
   • Thakur Ji

   OriginalPaper 01 December 1973 Pages: 371 - 379

9. Systematische und phylogenetische studie über die GattungenThienemanniola Kieffer undCorynocera Zetterstedt (Diptera, Chironomidae)

   • Jens Lehmann

   OriginalPaper 01 December 1973 Pages: 381 - 414

10. Sound production by synodontis schall (Bloch-Schneider)

    • Y. B. Abu-Gideiri
    • D. H. Nasr

    OriginalPaper 01 December 1973 Pages: 415 - 428

11. Food selection by Labeo Rohita (Ham.) and its feeding relationship with other major carps

    • Rashid A. Khan
    • A. Qayyum Siddiqui

    OriginalPaper 01 December 1973 Pages: 429 - 442

12. Observations on the incidence and seasonal fluctuations of certain crustacean larvae in the plankton of the South-West Coast of India

    • K. Krishna Pillay
    • N. Balakrishnan Nair

    OriginalPaper 01 December 1973 Pages: 443 - 461

13. Some ecological effects of artificial circulation on a small eutrophic lake with particular emphasis on phytoplankton

    • Robert C. Haynes

    OriginalPaper 01 December 1973 Pages: 463 - 504

14. An ecological study of the Ponggol Estuary in Singapore

    • Chua Thia-Eng

    OriginalPaper 01 December 1973 Pages: 505 - 533

15. Diurnal variation in Sagar Lake, Sagar (India) I studies in the deep water area

    • S. B. Saksena
    • A. D. Adoni

    OriginalPaper 01 December 1973 Pages: 535 - 543

16. Libri Novi

    BookReview 01 December 1973 Pages: 544 - 544