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

 and Secchi disk readings are indicated, Manning cruise 23, Gilbert cruise 18, and Smith cruise 

 27, December 1954-February 1955. 



Table 4. --Results of the deep trolling experiment and a summary of the 

 longline albacore catches for the same days, John R. Mannin g 

 cruise 23, December 1954-February 1956 



