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

 Fish and Wildlife Service, John L. Farley, Director 



SIZE VARIATION OF CENTRAL AND WESTERN 



PACIFIC YELLOWFIN TUNA 



By 



Edwin S. Iversen 



Fishery Research Biologist 



Pacific Oceanic Fishery Investigations 



U. S. Fish and Wildlife Service 



Special Scientific Report--Fi8her ies No. 174 

 WASHINGTON: June 1956 



