The section on 140 W. (fig. 4, tables 2 and 3) gives the familiar picture of upwelling 

 at the Equator, although less intense than on 120 W. and 130 W. , and indicates clearly a concen- 

 tration of yellowfin in the South Equatorial Current north of the Equator. This section is not, 



however, strictly connparable to the other sections included in this report as it is made up of 



oo oo 



stations from the Cavalieri cruise (1 to 7 N. ) and fronn Manning cruise 12 (0 to 7 S.). The 



Cavalieri steUions were fished from August 21 to September 6 and the Manning stations from 



August 31 to September 4, probably an inconsequential difference in tinne. 



There were two sections along 150 W. longitude {figs. 5 and 6, tables 3 and 4), One 

 was fished during the course of Manning cruise 12 in August 1952 and the second during Manning 

 cruise 13 in October-November 1952. Both sections provide evidence of moderate upwelling and 

 a moderate concentration of yellowfin north of the Equator. Falling between these sections in 

 time were the stations fished by the Cavalieri in September of 1952 along 150 W. longitude. It 

 is of interest to note that her catches (table 2) average considerably higher than those experienced 

 a month earlier and a month later by the Manning . These catches of the Cavalieri were lower, 

 however, than those obtained along 150 W. longitude in September 1951 (Murphy and Shomura 

 1953a). 



Table 2. --Sunnmary of the tuna catch, Cavalieri cruise 1 



(more complete data will be found in the appendix) 



