ACKNOWLEDGMENTS 



Many people have contributed to this study. 

 John C. Marr of the Bureau of Commercial Fish- 

 eries, Honolulu, suggested this investigation and 

 gave advice. Detailed criticism was received 

 from O. Elton Sette, Bureau of Commercial Fish- 

 eries Biological Laboratory, Stanford; Vernon 

 Brock, University of Hawaii, Marine Laboratory; 

 and Milner B. Schaefer, Scripps Institution of 

 Oceanography. Valuable suggestions were re- 

 ceived from David N. Cushing, Fisheries Labo- 

 ratory, Lowestoft; William F. Royce, Fisheries 

 Research Institute, University of Washington; 

 and William E. Ricker, Fisheries Research 

 Board of Canada. The suggestions and encour- 

 agement of my colleagues at the Biological Lab- 

 oratory of the Bureau of Commercial Fisheries 

 in Honolulu, especially John J. Magnuson, Tamio 

 Otsu, Gunter R. Seckel, Richard S. Shomura, 

 Lucian M. Sprague, and Richard N. Uchida, are 

 appreciated. I am responsible for the arguments 

 forwarded in this paper and do not wish to infer 

 that those acknowledged necessarily agree with 

 my conclusions or methods. 



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 1959. Morphometric comparison of skipjack 

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 1963. Synopsis of biological data on skipjack 

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