Cape blanco 



AVERAGE PLANKTON VOLUMES 

 1959 



SAN FRANCISCO 



NT CONCEPTION 



ySA.N D1ESO- 



CC. OF PLANKTON PER IOOO M 3 

 OF WATER STRAINED 



0-33 

 34-100 

 101-300 

 301-900 

 OVER 900 

 o STATIONS OCCUPIED 



Figure 3.--Average plankton volumes, 1959. 



