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Figure 4. — Concentrations of 

 skipjack forage measured 

 in the fourth cruise period 

 of the EASTROPAC expe- 

 dition, August- September 

 1967, in ml/ 1000 m-!: (A) 

 at night stations; (B) at 

 day stations. Heavy dashed 

 lines indicate positions of 

 zonally oriented maxima. 



