In order to show regional variations in the fishing conditions fronn east to west this 

 area has been divided into 5 parts of 2 of longitude each. Fishing conditions in each of these 

 sections are shown in table 98. As the table shows, there are more data for the western part 

 than for the eastern part of the area. 



o o 



Table 98. --Fishing conditions by 2 sections (35 to 



40° N., 150° to 160 E.) 



Black tuna were taken only west of 154 E. Yellowfin catch rates are notably lower 

 in the sections of 150 - 152 E, and 154 - 156 E. than they are in the other sections. The dis- 

 tribution of bigeye catch rates resembles that of the yellowfin with a general tendency toward high- 

 er rates in the esist and lower rates in the west. Albacore aie shoivn to be somewhat more 

 abundant at the eastern and western extrennities of the area and scarce in the middle. The spear- 

 fishes cire generally abundcint, with catch rates between 1.3 and 1.8. Comparing localities, there 

 are somewhat higher values west of 154 E. and in the section between 156 and 158 E. In 

 general the most important element in the catch in this sea area is the spearfishes. 



Table 99 shows monthly changes in fishing conditions in this sea area. 



Table 99. — Fishing conditions by months (35 to 40 N. , 

 150° to 160° E.) 



The data are limited to the period of 5 months from Septennber to January. The table 

 indicates that black tuna are taken only in November and December. Yellowfin were taken only 

 from September to November, with their highest catch rate in October. Bigeye tuna were taken 

 throughout the whole period covered by the table, but they were most abundant in September aind 

 October. There were few data for Septennber, but the maximum catch rate of 1. 36 in that 



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