LIST OF ILLUSTRATIONS 



FIGURE Page 



Frontispiece. — Several species of oceanic birds over a school of 

 Jumping yellowfln tuna. Kingman Reef, Line 

 Islands. May 1951. Photograph by Fred C. June. 



1. The form used to record surface observations on POFI vessels. . . 3 



Map of the central Pacific Ocean showing 

 "Island," "semloceanlc," and "oceanic 



2. Map of the central Pacific Ocean showing the demarcation Into 



provinces 4 



3. Comparison between average Hawaiian skipjack landings (1950-1952) 



and POFI surface sightings of skipjack schools in the 



Hawailsin Islands area 6 



4. Seasonal distribution of txina school sightings In the Line, 



Phoenix, and Hawaiian Islands. 7 



5. Seasonal distribution of oceanic fish school and bird sightings. 10 



6. Comparison of number of fish schools sighted per day In 



Hawaiian waters and oceanic waters 10 



7. Oceanic sightings between 140°W. longitude and 170*^. 



longitude summarized by latitude 11 



8. Results of longllning between 140°W. and 170°W. longitude 



during 1950-52 12 



