There are a number of points which should be examined with 

 regard to the size of the fish, and there are several circumstances to 

 consider in regard to the relationships of this population. The character 

 of the size connposition of the albacore Ismded from this sea area agrees 

 well with that of fish from the North Pacific fishing ground east of the 

 line of the Izu and Ogasawara archipelagoes on the following counts: 



(1) When we consider the sea areas east and west of the island 

 chains, we find that the farther west we go the snriziller the fish are, and 

 the farther east we go the larger they are, and this trend on the North 

 Pacific fishing ground can be extended to fit the whole area between 

 130°E. and 180°. 



(2) The trend toward larger sizes in the south is also in good 

 agreement with the situation on the North Pacific fishing ground. 



Table 7. --Average catch rates by 1-degree squares by years, 

 Kinan area. 



91 



