Abstract 



Basic data on volumes or zooplankton off the Pacific 

 coast in 1957 are given, together with haul data for all 

 plankton hauls taken on survey cruises of the California 

 Cooperative Oceanic Fisheries Investigations. Plankton 

 volumes were larger during February through April than 

 the six-year average for these months, and progressively 

 smaller during May through July than the six-year average. 

 Distribution charts showing relative areal zooplankton 

 abundance by month are included. 



