FISHERY BULLETIN: VOL. 70, NO. 4 



information may be used to study the relation- 

 ship betv\^een the distribution of food organisms 

 and occurrence of tuna schools. 



Most of the information up to 1969 on food 

 of various tunas off the west coast of Africa 

 may be found in the review of studies of tuna 

 food in the Atlantic Ocean by Dragovich (1969) . 

 Dragovich (1970) also reported on the food of 

 skipjack and yellowfin tunas off the west coast 

 of Africa. 



MATERIALS AND METHODS 



Samples on which the present report is based 

 were collected during February, March, April 

 and September, October, November of 1968 on 

 two cruises (UN6801 and UN6802) of the re- 

 search vessel Undaunted of the Bureau of Com- 

 mercial Fisheries (now National Marine Fisher- 

 ies Service) (Figure 1). All tunas sampled for 



10- 



5- 



0- 



5- 



10° 



15- 



20' 



Figure 1. — Shaded area shows lo- 

 calities where stomachs of skipjack 

 and yellowfin tunas were collected. 



20 



1088 



