iz6 CONTENTS 



Non-conservative properties p^ge 192 



The distribution of dissolved oxygen l 9 2 



Normal and abnormal conditions within the current .... 198 



The distribution of dissolved inorganic phosphate-phosphorus . . 201 



Bottom deposits 20 4 



MlCROPLANKTON 20D 



Terminology and presentation of data 206 



Taxonomic notes 2I S 



Diversity of the microplankton 219 



Distribution of the main groups of microplankton 225 



First survey 22 5 



Second survey 22 9 



Distribution of the main diatom groups 234 



First survey 2 34 



Second survey ........••• 2 4° 



Special distributional features 2 45 



Observations on discoloured water . . . . . . . .252 



The distinction between offshore and inshore diatom floras . . . 256 

 The cosmopolitan distribution of marine plankton diatoms and the 

 ' ecological characterization ' of the more important species from the 



Benguela current .......••• 263 



ZOOPLANKTON 268 



Polychaeta 268 



Chaetognatha 268 



Entomostraca 268 



Ostracoda 269 



Mysidacea 20 9 



Cumacea ............ 2 7° 



Amphipoda 2 7° 



Euphausiacea . . . . . . . . • • • .271 



Decapoda and Stomatopoda . . . . . . . . .271 



Mollusca 271 



Larvacea ............ 272 



Eggs and young stages of fish ........ 272 



Distribution of the zooplankton 273 



Economic resources of the Benguela current 274 



Fish and fisheries 274 



Seals 2 74 



Whales 2 75 



Guano Islands 2 7S 



Review of the main features of the Benguela current .... 277 



Normal conditions ........... 2 77 



Abnormal conditions .......... 278 



Comparison of the Benguela current with other upwelling regions . 280 



Organic production in the Benguela current 284 



Summary 286 



References 289 



