■57- 



30° N 



25° N. 



20' N. 



15° N 



10° N 



5° N 



5° S. 



10° S. 



15° S. 



25° W. 20° W. 15° W. 10° W. 5° W. 0° 



5° E. 10° E. 



Figure 1. Area in the eastern tropical Pacific where skipjack tuna 

 fisheries began to develop around 1955. 



