[MARMAM] Tourism impact on marine mammals (Antarctica) - Request for Information

Dear all, as a part of an university subject I have to do a talk on the topic "Antarctica and tourism" next week. Unfortunately the literature one finds is more on penguins and other birds than on mammals. I already searched the web of science as well as Cambridge journals and our university bibliographic database. Therefore I would like to ask if there are any papers or studies concerning the impacts of tourism (not necessarily whale watching) on seals and cetaceans in general and in Antarctica in particular. I would appreciate any help very much. Kind regards, Anke Kuegler