The reproductive biology of Pellonula afzeliusi Johnels, and Sierrathrissa leonensis thys Audenaerde in Lake Kainji, Nigeria Fidelis O. Otobo OriginalPaper Pages: 99 - 112
The freshwater calanoida (crustacea : copepoda) of Singapore and Peninsular Malaysia H. C. LaiC. H. Fernando OriginalPaper Pages: 113 - 127
Die-offs of the blue-green alga, Anabaena variabilis, in fish ponds Claude E. BoydJohn A. DavisEllen Johnston OriginalPaper Pages: 129 - 133
The plankton ecology of some thermal springs in West Bengal, India B. B. Jana OriginalPaper Pages: 135 - 143
Behavioral thermoregulation by Ammocoete larvae of the sea lamprey (Petromyzon marinus) in an electronic shuttlebox William W. ReynoldsMartha E. Casterlin OriginalPaper Pages: 145 - 147
Seasonal fluctuation of zooplankton populations in lower Delaware Bay Don MaurerLes WatlingAnn Pembroke OriginalPaper Pages: 149 - 160
Some factors influencing the microdistribution of a population of spined loach, Cobitis taenia (L.) P. W. J. Robotham OriginalPaper Pages: 161 - 167
Energy loss in an aestivating population of the tropical snail pila globosa M. A. Haniffa OriginalPaper Pages: 169 - 182
Effect of thermal acclimation on gametogenesis of the indian freshwater leech, Poecilobdella Viridis (Blanchard) M. M. HanumanteG. K. Kulkarni OriginalPaper Pages: 183 - 185
Lead, mercury, and certain nutrient elements in ulva lactuca (linnaeus) from Ras Beirut, Lebanon J. ShiberE. Washburn OriginalPaper Pages: 187 - 192