Zooplankton in a quasi-stable phase in an endorheic lake (Lake Chilwa, Malawi) Margaret Kalk OriginalPaper Pages: 7 - 15
Studies on the interspecific competition between Helisoma duryi (wetherby) and Biomphalaria camerunensis (boettger). Size-weight relationships and laboratory competition experiments Henry MadsenFlemming Frandsen OriginalPaper Pages: 17 - 23
Etude de la toxicite chronique de deux insecticides (Carbaryl et Lindane) a la generation Fi de Lymnea Stagnalis L. (Mollusque Gasteropode Pulmone). II. Consequences sur le potentiel reproducteur Jacqueline SeugeRoger Bluzat OriginalPaper Pages: 25 - 31
Distribution of bacteria and chlorophyll A at a nearshore station in Lake Ontario S. S. RaoR. E. KwiatkowskiA. A. Jurkovic OriginalPaper Pages: 33 - 39
Sex ratio in Mesocyclops leuckarti (Claus) populations in Lake Kinneret (Israel) Moshe Gophen OriginalPaper Pages: 41 - 43
Diel locomotor activity patterns of wild brown trout (Salmo trutta L.) in an electronic shuttlebox Robert A. BachmanWilliam W. ReynoldsMartha E. Casterlin OriginalPaper Pages: 45 - 47
Hermaphroditism and sex reversal in the four common oviparous species of oysters from the coast of Karachi M. Asif OriginalPaper Pages: 49 - 55
Denitrification by the sessile microbial community of a polluted river Takuo Nakajima OriginalPaper Pages: 57 - 64
A contribution to the study of the food of six cyprinid fishes in three areas of the Lake Victoria basin, East Africa John S. Balirwa OriginalPaper Pages: 65 - 72
Diversity and indicator species as measures of water pollution in a subarctic lake James W. Moore OriginalPaper Pages: 73 - 80
Composition and abundance of phytoplankton in tributaries of the lower Colorado river, Grand Canyon region Wayne M. CraytonMilton R. Sommerfeld OriginalPaper Pages: 81 - 93