Table 5. --Results of correlation analyses based on repeated observations made at 

 station D (position shown in fig. 4), comparing adjusted zooplankton 

 volumes with several environmental factors and with the weekly skip- 

 jack catch of the Hawaiian area 



900 



800 



. 700 

 in 

 m 



_] 



U- 



O 600 

 in 



Q 



z 



§ 500 



o 



X 



5 400 



I- 

 < 



g 300 



< 



in 200 



100 



"1 — r 



1 — r 



-40 



h30- 

 O 



o 



\ 



o 

 o 



■£ 



o 



\- 



20 ^ 



Q. 



o 

 o 



M 



- 10 



SURFACE TEMPERATURE 



ZOOPLANKTON 



WEEKLY SKIPJACK CATCH 



78 



77 



LU 

 IT 



ir 

 iij 



76 



UJ 



o 



s 



a. 



=) 

 in 



- 75 



10 15 20 

 APRIL 



25 30 



10 15 20 25 

 MAY 



10 15 20 25 30 

 JUNE 



Figure 10. --Variations in surface temperature and zooplankton volume at station D, compared with 

 the weekly Hawaiian skipjack catch for the period April 1 to June 30, 1953. 



14 



