CONTENTS 



Introduction page 67 



The physical environment of the Antarctic plankton 68 



Methods 70 



Organisms identified 72 



Cruises in the period 1927-31 77 



The Antarctic convergence 83 



Diurnal variations 87 



Relative abundance and distribution of individual species 97 



Distribution of rich and poor plankton 109 



General distribution 109 



Variations in abundance 1 1 1 



South Georgia 1 1 1 



Drake Passage and Scotia Sea 116 



Distribution of warm- and cold-water species 121 



South Georgia 121 



The South Sandwich and Weddell Sea region 124 



The Orkney-Shetland region 132 



The Bellingshausen Sea 133 



The Northern Antarctic region 134 



Plankton communities 137 



The Weddell Sea 138 



The Bellingshausen Sea 141 



The Orkney-Shetland region 144 



The northern zone 146 



Faunistic divisions T50 



The macroplankton and the distribution of whales 153 



Summary 157 



List of literature 158 



