o o 



Table 57. --Fishing conditions by months (25 to 30 



N. , 140° to 150° E.) 



As the foregoing shows, in areas of about the same latitude, the changes in fishing 

 conditions for each species from month to month are very similar, and this fact is an interesting 

 indication in coi\8idering the migrational patterns of these fishes. It shows that in the sea area 

 south of the Japanese sea islands, at any rate, it is difficult to think of these fishes as having 

 any definite nnigrational paths. 



Table 58 shows fishing conditions in this area divided up by 2 of longitude in order 

 to compare the fishing from east to west. 



o o 



Table 58. --Fishing conditions by sections (20 to 25 N. , 



140° to 150° E.) 



For the yellowfin the local differences in fishing conditions are not marked. However, 

 catch rates are somewhat higher from 140 to 142 E. and from 146 to 148 E. Local differ- 

 ences in bigeye catch rates are likewise not striking, but they appear to be higher in the east and 



92 



