OCEANOGRAPHIC SURVEY 

 (WINTER a SUMMER) 



2.000,000 r 



1 ,000,000 



o"- 



WEEKLY RECONNAISSANCE 

 (SPRING a FALL) 



JFMAMJJASONO 



MONTHLY AKU LANDINGS (HONOLULU) 

 TYPICAL YEAR (POUNDS) 



Figure 26. Survey Plan for Hawaiian Hydrography. 

 As is true for equatorial tuna, we believe that the abundance and 

 movements of the skipjack are controlled by events in the sea. 

 Using the skipjack catch as a guide, hydrographic surveys have 

 been planned and are in progress to discover the events during 

 both the changes of the seasons and at the times of greatest and 

 least abundance. It is hoped that these surveys of both a detailed 

 and a reconnaissance nature will yield inforniation which will help 

 us understand the abundance, distribution, and movements of skip- 

 jack around the Hawaiian Islands. 



27 



