The design of a steady-state gradient for the study of populations in a continuously renewed environment Milton E. Lieberman OriginalPaper Pages: 1 - 7
The response of Moina brachiata (Jurine) 1820 to biological oxygen demand, oxygen, and light Milton E. Lieberman OriginalPaper Pages: 9 - 16
Influence of organic matter on some characteristics of aquatic soils Claude E. Boyd OriginalPaper Pages: 17 - 21
A new species of the genus prionospio (Annelida: Polychaeta) Murad-B. M. Mohammad OriginalPaper Pages: 23 - 26
A population study on larvae of the damselfly Pyrrhosoma nymphula (Sulzer) (Odonata: Zygoptera) J. H. Lawton OriginalPaper Pages: 33 - 52
Effect of certain trace elements and soil extract on some marine algae A. H. NasrA. H. Nasr OriginalPaper Pages: 53 - 60
Notes on the abundance of the diatom hemidiscus hardmannianus (Grev.-Mann) in the Singapore Straits Chua Thia Eng OriginalPaper Pages: 61 - 64
Ecological study of gastropoda in a swamp in the neighbourhood of Ghent (Belgium) W. De CosterG. Persoone OriginalPaper Pages: 65 - 80
Seasonal changes in the waters of Lake Chilwa (Malawi) in a drying phase, 1966–68 A. MorganMargaret Kalk OriginalPaper Pages: 81 - 103
Limnological studies on freshwater ponds of hyderabad-India Mohiuddin Munawar OriginalPaper Pages: 105 - 128
Revision der Europäischen Arten (Imagines ♂♂) der Gattung Parachironomus Lenz (Diptera, Chironomidae) Jens Lehmann OriginalPaper Pages: 129 - 158
Antibacterial activity traceable to the marine blue green alga Trichodesmium erythraeum in the gastro-intestinal contents of two pelagic fishes V. D. Ramamurthy OriginalPaper Pages: 159 - 163
Studies in aquatic fungi of varanasi. X. Additional new or interesting records of aquatic phycomycetes Thakur Ji OriginalPaper Pages: 179 - 186