MALES = 645 (67%) 



FEMALES = 318 



50 60 



70 80 90 100 110 120 130 140 150 160 170 

 MIDPOINTS OF 10 CM. GROUPS 

 ) 20 30 40 50 75 100 150 200 250 



APPROX. WEIGHT IN POUNDS 

 Figure 3. --Percentage bigeye tuna males in 

 sample by size groups. Sample from 137 - 

 165 E. longitude taken between March 29 and 

 May 28, 1951, Lower panel shows the sex 

 ratios of each size class of the sample in 

 figure 2 (same data used by Otsu (1954)). 



