United States Department of the Interior, Stewart L. Udall, Secretary- 

 Fish and Wildlife Service, Clarence F. Pautzke, Commissioner 

 Bureau of Commercial Fisheries, Donald L,. McKernan, Director 



TUNA OCEANOGRAPHY IN THE 

 EASTERN TROPICAL PACIFIC 



By 



Maurice Blackburn and associates 

 in the Tuna Oceanography Research Program 

 Scripps Institution of Oceanography- 

 University of California 

 La JoUa, California 



United States Fish and Wildlife Service 

 Special Scientific Report--Fisheries No. 400 



Washington, D, C. 

 February 1962 



