CONTENTS 



PAGE 



ABSTRACT 



This report deals with research results achieved by the 

 Bureau of Commercial Fisheries Biological Laboratory in 

 Honolulu from July 1, 1965, to December 31, 1966. Stressed 

 are the studies which have provided the first numerical 

 estimates of the size of the skipjack tuna population of the 

 central Pacific Ocean, an untapped stock of fishes that could 

 hugely increase the U. S. tuna catch. Investigations with a 

 new, sophisticated sonar and a small two-man submarine are 

 also described. Publications issued or in press during the 

 period are listed. 



Introduction 3 



The catch of tunas 5 



The tunas of the central Pacific 7 



The state of the Hawaiian fisheries 7 



The Hawaiian aku fishery 10 



The Hawaiian longline fishery 14 



The eastern Pacific tuna fishery 16 



The Japanese longline fleet in the Pacific 18 



Tuna larvae and young 20 



Age and growth of tunas 24 



Estimates of tuna abundance 24 



The waters of the central Pacific 27 



Project Porpoise 27 



Wakes in lee of islands 29 



A sea goddess 33 



Fishes and gear 35 



Fisheries for the future 45 



Reports 47 



Translations 51 



