This work was financed by the Bureau of Connmercial 

 Fisheries under various contracts with funds made avail- 

 able under the Act of July 1, 1954 (68 Stat. 375), commonly 

 known as the Saltonstall- Kennedy Act. The work formed 

 part of the Scripps Tuna Oceanography Research Program, 

 Institute of Marine Resources, University of California. 



