Troll Catches. The albacore catches from 

 both incidental and deliberate surface trolling are 

 combined in figure 4. During Janliary-March 

 1954 no albacore were taken in the 1, 095 line- 

 hours of trolling (fig. 4A), although albacore 

 were talcen on the longline gear during thisperiod 

 (fig. 2). During the fall of 1954 (figs. 4B and 

 4C), trolling yielded 56 albacore in 1,701 line- 

 hours while during the following winter only 4 

 albacore in 2,911 line-hours. The highestcatch 

 rate of 8.8 albacore per 10 line-hours was made 

 during the fall at about 42 N. latitude on 172 E. 

 longitude (fig. 4B). 



There is a striking contrast between the 

 latitudinal locations of the fall and winter troll 

 catches, for most of the fall catches were nnade 

 north of 40 N. while the winter catches were all 

 made between 30 £ind 35 N. latitude, a south- 

 ward displacement roughly parallel to that of the 

 longline catches. 



Albacore, however, were present below 

 the surface in these waters as shown by the 

 longline catch at five of the seven stations at 

 which both types of gear were fished (table 4), 

 We cannot yet consider deep trolling a complete 

 failure, for only 7-1/2 hours have been devoted 

 to this type of fishing. 



Surface Sightings . To evaluate the 

 relative productivity of the different areas, 

 observations were made on bird flocks, fish 

 schools, and aquatic mammals. During the 

 period of our observations, the results (table 

 5) show that birds were most abundant during 

 the fall months. This is of interest since the 

 trolling records (fig. 4) show that nnost of the 

 troll-caught albacore were taken during this 

 period. The majority of the birds occurred 

 to the south, however, between 30 N. and 

 40 N. latitude, whereas most of the albacore 

 were taken north of 40 N, latitude. 



No albacore or other fish were taken on 

 the deep trolling gear used on Manning cruise 23. 



Figure 4A. --Albacore catch per lO-line hours of surface trolling; surface tem- 

 perature contours and Secchi disk readings are indicated. Manning cruise 19 

 and Smith cruise 25, January-March 1954. 



