2 
iocB©dlat«ly b«f«n to thickon, Ito ba»« eauk stOPidUly to iSO oeters 
depth, and the toraperaturo at 150 «®ter« roa# eorreapondingly, reaching 
a high of 27*2“'^ at 4®lUPigture 1)# 
At this latitude, th® chip croeeed the southern houndary of the SCO 
Into the westwardly flowing South iSquatorial Current (SSO), 
temperature at 150 meters began to cool again, the deeper portions of the 
minced layer were replaced by cooler water, and a new base to the 
•e 
surfaoe mixing formed near 75 motors depth, gradually rising to 50 meters 
aa the ship entered the Southern ^rid at 2®!I* 
Figure 1 also showe a plot of total hirde sighted each day, for 
ooiapari*. on with «s»a temrerature at the surface and at 150 meters depth. 
Bird nuabere were uodorato from Johneton Island to then dropped 
.1 
signifleantly in the HEC and the northern edge of the ^SC, Hewerer, 
the birds then increased oouthv^rd to a peak \^«lae near the southern 
boundary of the 2GS, and dropped off again as the ^Ip passed Into the 
5SC and approached the Southern Grid, Bird numbera show a eery good 
eorrelation with the 150 meter temperature, but do not correlate well 
with surface teciperiiture* Xhe 150 meter temperature itself ia not the 
« 
property of oignifioance to the birds, Rather, the temperature at this 
depth io probably a good indicator of differing water c:, asses, whose 
dlfferenoee In food content at the surface are the more likely sssash 
reason why bird® are concentrated in faeored zones. 
The temper iture plotc la figure 1 are based on a preliminary 
analysis of the BT data performed at sea, A refined analysis will be 
performed by the T'onolulu Laboratory, Bureau of Coimerclal Flsheriss, 
which any bo expoeted to jaodify the te?5perature data negligibly if at ill. 
