FISHERY BULLETIN: VOL. 74, NO. 3 



19 70 



NUMERICAL POINTS 



22,30 APRIL 



1971 



NUMERICAL POINTS 

 12,20 MAY 



24,25 JUNE 



10,17 JUNE 



22,23 JULY 



5,6 AUGUST 



10, AUGUST 



19,20 AUGUST 



20 OCTOBER 



14 OCTOBER 



30 NOVEMBER 



65^ 



LEGEND 



gi^K BOSMINA 



HOLOPEDIUM 



EPISCHURA 



DIAPTOMUS 



CYCLOPS 



EGGS 



COPEPODIDS 

 NAUPLII 



CHIRONOMID 

 PUPAE 



ALONA 



OTHER 



ORGANISMS 



Figure 4.-Seasonai change in the predominant food items of threespine stickleback in Great Central 

 Lake, 1970 and 1971. Figures in the periphery of each pie diagram represent the percent of 

 stickleback stomachs containing the particular item. 



658 



