r^i — i — r 



-\ 1 1 1 1 r 



OCEANIC 

 ( > 80 MILES FROM LAND) 

 N = 713 

 i - 139.1 



lEL 



n-^i — i — r 



"i i i I i i I r 



INSULAR 



(< 80 MILES FROM LAND) 

 N = 492 

 i= 1279 



- ■— ^~- '■ — "■ ■ Li L 



i ■ r- ■■,!.. 



Figure 7. --Yellowfin size distribution with 



distance from land (data in appendix table 14). 



the greater number of small fish (around 100 cm. = 43 lbs.) near land, 

 while the major mode of large fish is at 142 cm. (123 lbs.) in both 

 instances. 



If the 1953 catches are arranged by longitude of capture (fig. 8), 

 the size composition is virtually the same for 140°W. , 150°W., and 

 160°W. (modes at 142 cm. = 123 lbs.), excepting that a few more small 

 fish were captured to the west. Contrasting with this uniformity is the 

 sample from 170°W., where the major mode is some 5 cm. less (137 

 cm. = 110 lbs.) (fig. 8). 



Yellowfin captured on 150 -155 W., when arranged by time of 

 year (fig. 9), show that the size composition did not change materially 

 through 1953, except for the appearance of more small fish in the catches 

 made during the last half of the year. Even this change may merely 

 reflect distance from land, for the latter two samples are from 155°W., 

 300 miles closer than 150°W. longitude to the Line Islands, where small 

 yellowfin are comparatively abundant. 



16 



