1920] 



Allen: Plankton of the San Joaquin River 



183 



Table 1. — Organisms Per Cubic Meter in Plankton of 

 Stockton Channel in 1913 — (Continued) 



1913 



9/ 2 

 9/ 6 

 9/ 9 

 9/13 

 9/17 

 9/20 

 9/24 

 9/27 

 10/ 1 

 10/ 4 

 10/ S 

 10/11 

 10/15 

 10/18 

 10/22 

 10/26 

 10/29 

 11/ 1 

 11/ 5 

 11/ 8 

 11/12 

 11/15 

 11/19 

 11/22 

 11/26 

 11/30 

 12/ 3 

 12/ 6 

 12/10 

 12/14 

 12/17 

 12/20 

 12/24 

 12/27 

 12/31 



Brachionus 

 egg, free 

 female 



Brachionus 

 egg, free 



Rrachionus 

 plicatilis 



634,752 

 S46.336 

 793,440 

 1,057,920 

 370,272 

 687,648 

 476,064 

 370,272 

 370,272 

 952,128 

 793,440 

 952,128 

 634,752 

 952,128 

 528,960 

 264,480 

 317,376 

 105,792 

 105,792 

 158,688 

 52,896 



"238,032 



370,272 



132,240 



449,616 



449,616 



1.VS.6SS 



46,284 



119,016 



33,060 



66,120 



26,448 



72,732 



105,792 



6,400 

 6,400 



96,000 



105,792 



211,584 



211,584 



12,800 



19,200 



121,600 



264,480 



158,688 



105,792 



158,688 



105,792 



211,584 



44,800 



32,000 



6,400 



12,800 



52,S9li 

 3,200 

 9,600 

 1,600 

 6,400 

 3,200 

 3,200 

 800 

 1,600 



Brachionus 



with 



endoparasite 



Epipha 



V 5 

 1/ 8 

 1/12 

 1/15 

 1/19 

 1/22 

 1/26 

 1/29 

 2/ 2 

 2/ 5 

 2/ 8 

 2/12 

 2/15 

 2/19 

 2/23 

 2/26 

 3/ 1 

 3/ 5 

 3/ 8 

 3/12 



92,568 



26,448 



158,688 



581,856 



555,408 



105,792 



1,481,088 



123,168 



1,190,160 



277,704 

 79,314 

 132,240 

 502,512 

 238,032 

 105,792 



