Fcr each haul are given also the location, date and time of col- 

 lection, and volume of water strained in obtaining the haul. The volume 

 of water strained was determined from current meter readings for all 

 values except the few enclosed by parentheses, for which reliable current 

 meter data were lacking. For the latter, an approximate value was 

 obtained which represented the average performance of the current meter 

 at the speed at which the hauls in question were taken. 



Inasmuch as plankton samples vary greatly in composition, a small 

 sample composed predominantly of crustacean plankton may actually repre- 

 sent more potential food material than a large sample composed largely 

 of jelly-like organisms, such as salps. This fact should be kept in 

 mind when using these data. 



These investigations are part of the California Cooperative Sardine 

 Research Program, a program sponsored by the Marine Research Committee 

 and being carried out by the Scripps Institution of Oceanography, the 

 California Department of Fish and Game, the California Academy of Sciences, 

 the Hopkins Marine Station of Stanford University, and the South Pacific 

 Fishery Investigations of the U. S. Fish and Wildlife Service. 



