methods presently available do not furnish samples of the population or populations that are 

 random with respect to the sizes of individuals. 



APPROXIMATE WEIGHT IN POUNDS 

 15 22 31 43 5B 75 95 119 146 177 213 252 296 



1 — I — I — I — I — I — I — I — I — I — I — I — I — I — r- 



n — I — I — I — r 



37 47 57 67 77 87 97 (07 117 127 137 147 157 167 177 187 



2 5 9 16 25 37 



-1 1 1 1 1 1 1 1 1 1 1 T- 



"T 1 1 T- 



37 47 5 



87 97 107 117 127 137 147 157 167 177 187 



LENGTH IN CENTIMETERS 



Figure 10. --Length frequencies of the four species of tuna commonly taken 

 during the mothership operations. For convenience a pound 

 Bcale is provided above each polygon. 

 15 



