whether the schools of small fish in the waters far offshore to the eastward 

 are actually more numerous or less numerous than those in sea areas closer 

 to the Japanese coast is one which must be examined further in the future. 



In table 7 the albacore taken between 140 E. and 150 E. are divided 

 into three categories, those below 75 cm. , those 75 to 95 cm. , and those 

 over 95 cm. , and the percentage of each class in the total landings is shown 

 by months. 



Table 6. --Results of oceanographic observations by the Sagami 

 Maru, March 1950 



Date. 



Start point of 

 setting of 

 lines. 



Water temperature. 



Om 



50 



75 



100 



End point of 

 setting of 

 lines. 



Water temperature. 



Om 50 75 100 150 



as* 



Hooked - 

 rate of 

 Albacore 



Mean le 

 nuth of 

 Albacore 



29° 

 174° 



29° 

 174° 



29° 

 174° 



29° 

 174° 



29° 

 174° 



29° 

 174° 



29' 

 174' 



30' 

 174° 



30° 

 171° 



30° 

 172° 



29° 

 168° 



28° 

 168' 



29° 

 168' 



37'N 

 05' E 

 27' 

 52' 

 29' 

 46' 

 36' 

 31' 

 19' 

 49' 

 07' 

 42' 

 30' 

 19' 

 10' 

 10' 

 03' 

 55' 

 26' 

 02' 

 00' 

 31' 

 53' 

 26' 

 05' 

 55' 



17.95 



20.1 



19.4 



18.2 



18.4 



19.4 



19.6 

 18.0 

 17.1 

 19.8 

 19.7 



5518 



17.5 



18 



18.9 



17.95 



17.85 



17.75 

 18.65 

 17.15 

 17.45 

 18.65 

 19.55 



17.4 

 2517.7 



17.6 



17.85 



17.9 



17.6 



16.95 



17.9 



17.15 



16.85 



18.1 



19.5 



17.3 



17.6 



17.5 



17.55 



16.75 



17.25 



16.25 



16.2 



17.65 



19.0 



29° 

 174° 



29° 

 174° 



29° 

 174 



29° 

 174° 



29° 

 174° 



29° 

 174° 



29° 

 174° 



30° 

 174° 



29° 

 171° 



30° 

 172° 



28° 

 168° 



29° 

 168° 



51'N 

 06' E 

 45' 

 57' 

 33' 

 '25' 

 52' 

 24' 

 30' 

 15' 

 26' 

 32' 

 46' 

 10' 

 09' 

 26' 

 44' 

 58' 

 26' 

 06' 

 48' 

 54' 

 11' 

 39' 



17.6 

 18.65 

 17.6 

 17.75 



17.4 

 17.85 



17.8 17.6 17.6 



19.9 



18.4 



18.7 



19.1 



18.4517.2516.95 



18.7517.5517 



17.65 

 17.2517.25 



17.15 



17.8517.15 



19.6 



18.1 



17.6517.35, 



17.1 

 17.6 



3516 



16.3 



17 5 

 17.05 



16.7 



70 

 17.1 

 17.0 

 17.1 

 17.35 



16.65 



15.1 



15.9 

 15.85 



16.35 



15.70 



16.6 



16.1 



16 75 



17.95 



16.35 



4.33 



1.72 

 2.86 

 0.52 

 0.48 

 0.92 

 1.96 

 0.09 

 2.29 

 3.92 

 3.76 

 3.78 

 1.60 



77.1 

 96.6 

 96.7 

 94.2 

 90.2 

 97.4 

 90.2 



72.8 

 72.8 

 99.3 

 96.0 



According to the following table, areas where the majority of the 

 fish were under 75 cm. were all north of 30 N. Fish in the size range 

 of 75 to 95 cm., for the period January to March, nnade up the majority 

 of the catch between 28°N. and 30 N. and thus were farther south than 

 the fish below 75 cm. in length. 



106 



