United States Department of the Interior, Fred A. Seaton, Secretary 

 Fish and Wildlife Service, John L. Farley, Director 



JAPANESE ALBACORE AND BIGEYE TUNA SIZE COMPOSITION STUDIES 



Translated from the Japanese language by 



W. G. Van Campen, Translator 



Pacific Oceanic Fishery Investigations 



U. S. Fish and Wildlife Service 



Honolulu, T. H. 



CONTENTS 



Page 



Size composition of albacore and bigeye tuna of the North Pacific fishing grounds, by 



Hiroshi Nakamura, Tadao Kamimura, and Yoichi Yabuta 1 



Albacore studies. 1. Size composition of albacore taken in the North Pacific during the 



period of southward movement, by Akira Suda 6 



Albacore studies. II. Size composition of albacore taken in the North Pacific during the 



period of northward movement, by Akira Suda 14 



Bigeye studies. I. Size composition of the bigeye on the North Pacific fishing grounds 

 (and especially on the alternate-year cycle in the size composition), by Tadao 

 Kamimura and Misao Honma 20 



Bigeye studies. II. A consideration of the size composition of bigeye taken on pole and 



line, by Misao Honma and Tadao Kamimura 36 



Albacore studies. III. Size compositions seen in the several ocean currents, by Akira 



Suda 43 



Literature cited 48 



Special Scientific Report--Fisherie8 No. 182 

 WASHINGTON: June 1956 



