United States Departeent of the Interior 

 Oscar L* Chapouui, Secretary 

 Fish and Wildlife Service 

 Albert M» Day, Director 



Special Scientific Report - Fisheries 

 No. 21 



AGE DETERMINATION OF FISH (PRELIMINARY REPORT 1) 



By 

 Hiroca:i Aikawa 

 and 

 Ifasuo Kato j/ 



Translated from the Japanese language by 



W* 6* Van Campan 

 Pacific Oceanic Fishery Investigations 



CONTENTS 



Preface Page 



Synopsis. • • ...•..•.. 1 



Black tuna. 1 



Tellowfin txina 5 



Albacore 8 



Skipjack 10 



1/ Fisheries Experiment Station. FrCTn Bulletin of the Japanese 

 Society of Scientific Fisheries, Vol. 7, No. 1, pp. 79-88. 

 May 1938. 



