TABLE OF CONTENTS 



Page 



Species of fish in the catches ' 



Effect of type of bait on the catch ^ 



Relative catching efficiency of the vessels 4 



Distribution of the principal species as indicated by the catches 5 



Variation in the catch with longitude and time " 



Latitudinal variation in catch rates 1 1 



Size frequencies of tunas '* 



Relation of yellowfin catch rates to the environment 19 



Summar'. 



30 



Appendix -^1 



Literature cited '*'* 



