Six vessels participated in survey cruises during 1953. These were the 

 S. F. Baird, the Crest, the Horizon, the Paolina T . and the E. W. Scripps of the 

 Scripps Institution of Oceanography, and the Yellowfin of the California Department 

 of Fish and Game. The vessels taking part in monthly and special survey cruises 

 are listed in text table 2 . 



Text table 2 . - Research vessels participating in the 

 collection of plankton material, 1953. 



Monfli 



Number 

 Cruise vessels S. F. PAOLINA E. W. 



number used BAIRD CREST HORIZON T . SCRIPPS YELLOWFIN 



X 

 X 



X 

 X 

 X 



X 

 X 

 X 

 X 

 X 

 X 

 X 



X 

 X 

 X 

 X 

 X 

 X 



X 

 X 

 X 



X 

 X 

 X 



X 

 X 

 X 



X 

 X 



METHODS OF SAMPLING 



The procedures followed in making plankton hauls and in standardizing the 

 data "have been described in previous papers in this series. Refer particularly to 

 Special Scientific Report: Fisheries No. 102, pp. 4-6. 



SEPARATION OF FISH EGGS AND LARVAE FROM PLANKTON 



SAMPLES 



During 1953, a total of 1456 plankton hauls were made. Plankton volumes 

 for these hauls are reported in "Zooplankton Volumes off the Pacific Coast, 1953", 

 Special Scientific Report: Fisheries No. 132. Larger samples were divided into 

 aliquot portions (2, 4, 8 or 16), one of which from each sample was examined for 

 fish eggs and larvae. The majority of samples were examined in entirety. Informa- 

 tion, by cruise, concerning the number of samples examined in entirety and those 

 which were fractioned, is given in text table 3. 



