Fig. 1. Study area in the context of International Whaling Commission (IWC) Antarctic baleen whale areas. Most trips left from Ushuaia, Argentina or Port Stanley, Falkland Islands [Islas Malvinas]. Trips to the Antarctic Peninsula were more common than those to South Georgia, necessitating a post hoc designation of an Antarctic Peninsula–Drake Passage stratum (left of the dotted line) and a Scotia Sea (right of the dotted line) stratum.