ILLUSTRATIONS 



FIGURE Page 



Frontispiece: Longline fishing for albacore in the North Pacific, John R. Manning 

 cruise 19 



1. Schematic view of one basket of the longline gear 2 



2. Sunnnnary of POFI longline albacore catches 3 



3. Summary of some Japanese longline albacore catches 4 



4. Albacore catch per 10-line hours of surface trolling; surface temperature 



contours and Secchi disk readings 6, 7, 8 



5. Vertical temperature sections and longline catch of albacore (catch/ 100 hooks) 



aJong 160 W. longitude 10, 11, 12 



6. Calibration of chemical sounding tubes with bathythermograph on John R. 



Manning cruises 22 and 23 13 



7. Length frequency of albacore 17 



8. Summary of POFI longline bigeye catches ig 



