Figure 75. Geographic distribution of bluefin tag release and recapture data illustrating transatlantic and transequatorial 

 migrations. 



latitude 20°S consisted mainly of At- 

 lantic bluefin tima T. thynnus thymms. 

 and that those south of 20°S con- 

 sisted mainly of southern bluefin 

 tuna, T. maccoyii. The recapture off 

 Argentina of a giant bluefin which 



had been tagged off the Bahamas in- 

 dicates that the already tremendous 

 migratory circuit suggested above for 

 Atlantic bluefin occasionally extends 

 much farther south, well into the habi- 

 tat of tlie southern bluefin. 



nie nine recoveries in Norwe- 

 gian waters Irom the releases in the 

 Straits of Florida will be discussed in 

 part 3 of this section. 



Ciiant bluefin tuna have also been 

 tagged successlully during the sum- 



115 



