1. Temperature fluctuations within English lowland ponds

   • N. A. Martin

   OriginalPaper 01 December 1972 Pages: 455 - 470

2. Ecological observations on Heterotrophic, methane oxidizing and sulfate reducing bacteria in Pond

   • Th. E. Cappenberg

   OriginalPaper 01 December 1972 Pages: 471 - 485

3. Phosphorus availability and alkaline phosphatase activities in two Israeli fishponds

   • Thomas Berman
   • Gad Moses

   OriginalPaper 01 December 1972 Pages: 487 - 498

4. On the changes in the structure of two algal populations: species diversity and stability

   • F. Symons

   OriginalPaper 01 December 1972 Pages: 499 - 502

5. Occurrence of juvenileSciaena cirrosa (L.) (Family Sciaenidae) at northern Sinai coast

   • J. Chervinski
   • A. Lourie

   OriginalPaper 01 December 1972 Pages: 503 - 504

6. Limnological investigations in the area of Anvers Island, Antarctica

   • Gene L. Samsel Jr.
   • Bruce C. Parker

   OriginalPaper 01 December 1972 Pages: 505 - 511

7. Phase contrast photomicrography of cellular behaviour in spongillid porocytes (Porifera: Spongillidae)

   • Frederick W. Harrison

   OriginalPaper 01 December 1972 Pages: 513 - 517

8. On the quantitative characteristics of the pelagic ecosystem of Dalnee lake (Kamchatka)

   • Yu. I. Sorokin
   • E. B. Paveljeva

   OriginalPaper 01 December 1972 Pages: 519 - 552

9. Polychaetous annelids collected by ‘Umitaka-Maru’ from the Arabian Gulf

   • Murad-B. M. Mohammad

   OriginalPaper 01 December 1972 Pages: 553 - 559

10. Libri novi

    BookReview 01 December 1972 Pages: 561 - 566