1932/33 ^ 



1936/37 ^^ 



~7=W 



1947/46 F 



Closed season for baleen whales 

 Closed season for blue whales only 

 Open season 



Figure 21 y. Duration of pelagic whaling season in the Antarctic from Tgjs-ig^g. 

 {International Whaling Statistics^ ^959-) 



34/35 37;3e 45/46 46/47 47/48 48/49 49/50 SO/51 51/52 52/53 53/54 54/55 55/56 56/57 57/58 58/59 



Average number of catchers per floating factory CD and average I H P per catcher V~\ 



Figure 218. The mimber of catchers per Antarctic factory ship, and the power of the catchers 

 have approximately doubled since 1934. {International Whaling Statistics, 1959.) 



