Carotenoids in Ostrea edulis L. (Bivalvia: Ostreacea) from the lagoon of Venice (Italy) Bazyli Czeczuga OriginalPaper Pages: 195 - 197
A laboratory study of the food of three species of leeches occurring in British lakes J. O. YoungJ. W. Ironmonger OriginalPaper Pages: 209 - 215
Effect of temperature on the development, growth and egg production in Daphnia carinata King (Cladocera-Daphnidae) K. VenkataramanS. V. Job OriginalPaper Pages: 217 - 224
Toxicity of mercury: A comparative study in air-breathing and non air-breathing fish Kamal K. DasSubhasri G. DastidarSudip K. Banerjee OriginalPaper Pages: 225 - 229
Prey selection by Chaoborus punctipennis under laboratory conditions Robert W. WinnerJack S. Greber OriginalPaper Pages: 231 - 233
A bioassay study of effects of zooplankton, iron and NTA on the phytoplankton productivity of a marl lake Stuart F. MitchellRobert G. Wetzel OriginalPaper Pages: 235 - 241
The use of the Shannon-Wiener diversity index to delineate the horizontal distribution of crustacean zooplankton communities in Lake Superior, 1973 R. E. Kwiatkowski OriginalPaper Pages: 247 - 256
Trophic changes, without changes in the external nutrient loading Lennart HenriksonHans G. NymanJan A. E. Stenson OriginalPaper Pages: 257 - 263
Regulation of ammonia (NH3-N) metabolism in the marine pulmonate, onchidium verruculatum. I. effects of a neuroendocrine centre on tissue ammonia levels M. M. HanumanteU. D. Deshpande OriginalPaper Pages: 265 - 268
Contribution to the dynamics of mean-size statistics in a changing fishery: I. Family citharinidae in kainji lake, Nigeria E. O. Ita OriginalPaper Pages: 269 - 277