350 



/ = 15 20 25 30 35 



FIG. 3 DISTRIBUTIONS OF CONDITION FACTORS OF MIGRATORY AND SEDENTARY 

 SCHOOLS (RYUKYU SEA AREA, 1934). WHITE DOTS FOR MIGRATORY SCHOOLS, 

 BLACK DOTS FOR SEDENTARY SCHOOLS. THE BROKEN LINE SHOWS THE 

 DISTRIBUTION OF THE CONDITION FACTOR FOR ALL SCHOOLS. HORIZONTAL 

 AXIS IS THE CONDITION FACTOR , VERTICAL AXIS IS THE NUMBER OF FISH. 



CENTRAL 



GROUNDS 



FIG. 4 DISTRIBUTION OF POSITIONS AT WHICH MIGRATORY SCHOOLS (WHITE DOTS) 

 AND SEDENTARY SCHOOLS (BLACK DOTS) WERE FISHED. (RYUKYD SEA 

 AREA, 1934 -1935) 



40 



