Table 1, --Distribution of water temperatures due east of Same, 

 Aoinori Prefecture. (Based onSemi-annualReports of Oceano- 

 graphical Investigations, No. 63, 1939) 



Mortti iS '/ '' 'f '' ,! '/ " I '/ '^ '^ '■' '' '/ '/ . 



10 50 100 150 200 250 300 350 400 450 500 600 700 800 900 1.000 



Distance from coast in miles 



VI 



K 



21.7 

 15.6 



23.0 

 17.7 



21.7 

 8.4 



22.6 

 17.3 



24.4 

 11.3 



21.5 

 15.4 



22.8 

 10.4 



21.5 

 19.2 



23.2 

 8.0 



21.2 

 15.5 



21.8 

 7.3 



20.4 

 11.5 



21.8 

 10.0 



22.7 

 14.0 



18.7 

 3.5 



20.3 

 9.8 



19.8 

 4.3 



21.4 

 12.8 



18.5 

 8.5 



17.2 

 9.2 



17.4 



7.8 



16.3 



7.0 



20.0 

 9.0 



Note: Upper figure is temperature at surface, lower at 50 m. 



The following table shows data on oceanographic conditions 

 in this area from commercial fishing vessels. 



Table 2. --Water temperature data from reports of fishing boats 



Date eund i 

 position 



Om 



50m 



lOOm 



Date ajid 

 position 



Om 



50m 



100m 



Date and 

 position 



Om 50m 



100 m 



1949 

 IX 2 



'/ 

 '/ 7 



'/ 

 '/12 



'/ 

 '/17 



'/ 

 '/22 



156'50'K 

 37='02'N 



157=20' 

 36 '14' 



160=27' 

 38=12' 



160=18' 

 SB" 12' 



159°55' 

 38=40' 



26 8°C 



25.5 



24.0 



24.3 



23.9 



17 7=C 



15.2 



18.0 



18.0 



17.2 



1949 

 IX 2 



'/ 

 '/ 8 



// 



'/12 



'/ 



>/Yl 



It 22 



164=8 5' E 

 40=08' N 



163=09' 

 39=27' 



164=07' 

 40=08' 



161° 17' 

 39° 19,8' 



] 60=34' 

 40=21' 



23.6=C 



20. 2~ 

 21.2 



1S.3~ 

 19.4 



19. 5~ 

 20.2 



21.9— 

 23.2 



I6.0=C 



18.0 



15.0 



17.0 



17.5 



12.0=C 



13.2 



12.7 



13.0 



16.3 



1949 

 1X23 



'/ 



X 1 



'/ 



'/ 6 



159=12'E 

 39=55'N 



159=52' 

 33=09' 



158=24' 

 37 = 41' 



20.3°C 



2.3.2 



21.9 



13 4°C 



16.5 



16.5 



9.3° C 



In this sea area in September, as will be set forth in later sec- 

 tions, the catch is made up principally of spearfishes and bigeye tuna, 

 and the albacore catch is of very small significance in the fishery. 

 Geographically, the catch rates show a tendency to be high in the east 

 and low in the west, with alnnost no catch west of 150 E. and with hardly 

 any cases where the catch rate rises above 0. 1 percent even in the area 

 between 150 E. and 160 E. At 160 E. to 170 E. the catch rate is rather 



conspicuously increased over that in the area of 150 E. to 160 E. . and 



o o 



at 170 E. to 180 , although there are few data, the catch rates increase 



still further and in one case a rate of„2.66 was recorded. Farther to the 



east there are no data at all so we have no idea of the situation in that sea 



area, but it is thought that there is a possibility that the fishing grounds 



continue on into west longitudes. 



