-233- 



ro 

 O 



>- 

 < 



O 

 Ll. 

 Li. 

 LiJ 



X 



>- 

 < 

 o 



I- 

 q: 

 o 

 u. 

 u. 

 ijj 



60- 

 40- 

 20 



NORTH AMERICAN 

 SURFACE FISHERY 



_L 



A. 



A. 



_L 



_L 



_L 



_L 



1961 



1963 1965 1967 1969 1971 



1973 1975 1977 



Figure 2. Yearly effort in the Japanese surface, Japanese longline, 

 and North American surface fishery for years 1961 to 1978. 



