Table 2. --Percentage frequency of occurrence of the food items consumed by yellowfin and skipjack 



tunas captured in the Gulf of Guinea during 196'4. 



Food item 



Invertebrates : 

 Amphipods : 



Brachyscelus sp 



Phronima sedentaria 



Phrosima s&milunata. 



Copepods : 



Penella exocoeti 



Decapods : 



Braehyura megalops 



Pagurus sp . ( larvae ) 



Phyllosoma larvae 



Unidentified shrimps 



Euphausiids : 



Euphausia sp 



Stomatopods : 



Unidentified larvae and postlarvae 

 Cephalopods : 



Abralia veranyl 



Bathypol5rpuE sponsalis 



Illex illeeebrosus coindetii 



Chimastrephes pteropus 



Onycoteuthis banks i 



Onykia appelofii 



Todarodes sagittatus 



Unidentified cephalopods 



Gastropods : 



Atlanta sp 



Tunicates : 



Unidentified salps 



Vertebrates : 

 Engraulids : 



Anchoviella guineensis 



Gonostomatids : 



Unidentified 



Sternoptyohids : 



Stemoptyx diaphana 



Exocoetids : 



Oxyporhamphus micropterus 



Syngnathids : 



Hippocampus sp 



Berycoids : 



Unidentified 



Carangids : 



Vomer setapinnis 



Scombrids : 



Euthynnus alletteratus 



Auxis sp 



Unidentified 



Gempylids : 



Unidentified 



Trichiurids : 



Trichiurus sp 



Stroma teids : 



Psenes cyanophrys 



January -May 



Yellowfin 



U.7 

 1.5 

 1.5 



1.5 



10.3 



33.8 



2.9 



23.5 



13.2 



4.4 

 1.5 

 7.4 

 1.5 

 7.4 

 2.9 

 1.5 

 48.5 



2.9 



30.9 



2.9 



1.5 



1.5 



5.9 



1.5 



8.8 



4.4 



10.3 



1.5 



16.2 



2.9 



2.9 



Skipjack 



5.9 



5.9 



11.8 



11.8 



5.9 

 5.9 



July-October 



Yellowfin 



15.3 



5.6 

 1.4 

 2.8 

 9.7 



33.3 



9.7 

 12.5 



1.4 



4.2 



18.1 



1.4 



1.4 



1.4 



15.3 



4.2 



1.4 



2.8 



Skipjack 



31.3 



6.3 



6.3 



43.8 



12.5 



