EXTERNAL CHARACTERS OF BLUE WHALES 



291 



-r 



15 'JO 



LENGTH OF WHALE IN METRES 



-r 



15 20 



LENGTH OF WHALE IN METRES 



Fig. 17. Male Blue whales. Measurement No. 12. Fig. 18. Female Blue whales. Measurement No. 12. 

 Notch of flukes to end of ventral grooves. Notch of flukes to end of ventral grooves. 



g«- 



< - 



1- 



z 



U 



« 3' 



13 



—I — 

 20 



— I — 

 25 



LENGTH OF WHALE IN METRES 



Fig. 19. Blue whales (upper curves males, lower curves females). 



Measurement No. 13. Anus to reproductive aperture. 

 South Georgia whales. South African whales. 



5-2 



