PLANKTON VOLUMES 

 APRIL 1958 



~<^i- ^ 



CC OF PLANKTON PER 1000 CM 

 OF WATER STRAINED 



0-33 

 34-100 

 ^P 101-300 

 ^M 301-900 

 WM OVER 900 

 o STATIONS OCCUPIED 



o 

 _^:,;^ ^ » „ o " 



o 



Figure 7.- -Plankton volumes, April 1958. 



23 



