Y/A < I PER 100 HOOKS 

 ^^ 1-5 PER 100 HOOKS 

 — >5 PER 100 HOOKS 



0° 

 5° 



10° 

 5° 

 0° 

 5° 



JUL 



AUG 



170° 160° 



W LONGITUDE 



170° 160° 



W LONGITUDE 



Figure 3. --Japanese commercial yellow- 

 fin catches in the central Pacific in 1953 

 (data from appendix table 12). The rec- 

 tangles indicate the areas fished and the 

 code indicates the catch rates. 



