Table 1 . — Experiment I. Use of frozen Skclelonema costatiim (S). Cyclotella nana (C), and freshly hatched and frozen 

 Anemia by larval and postlarval brown shrimp, Penaeus aztectis. 



1971 



Month 



Day 



Hour 



Larval 

 stage 



Larval 

 count 



Algae 



Residual 



Feed 



Anemia 



Residual 



Feed 



No. cells/ml 



No. cells 

 fed/ml 



No. /ml 



March 

 April 



April 

 April 



April 



April 



April 



April 



1700 



0800 



2000 



0800 



1130 

 1630 



2100 



0800 



1415 

 1545 



Protozoea II 



304.000 



307,290 



304.000 



297.061 



Protozoea II 



301.244 



Protozoea III 



Protozoea 111 



Protozoea III 

 Protozoea 111 



304.000 



27,0(M) S 

 210.000 C 

 ' 10,000 N 



48.000 S 

 19,000 C 



145.000 S 



220,000 C 



10,000 N 



231,000 5 

 845,000 C 



5,000 N 



30.000 S 



217.500 C 



15.000 N 



62.500 S 



195.000 C 



12.000 N 



92,500 S 



275,000 C 



30,000 N 



22.500 S 

 232.500 C 



32. .500 N 



37,500 S 

 197.500 C 

 47.500 N 



70.000 S 



277.500 C 



15,000 N 



65,000 S 



322.0(X) C 



10.000 N 



124,600 S 



152.100 S 

 272.300 C 



187.000 S 

 876,000 C 



200,000 S 

 500,000 C 



250,000 S 



250.000 S 

 500.000 C 



217.100 S 



147.100 S 



349.000 S 

 353.250 C 



194.0(K) S 

 194.000 S 



35 



