No.
No. There are no bears in Antarctica of any species.
No. None of the sea mammals or sea birds that visit Antarctica's beaches to breed are listed in any endangered, vulnerable or threatened species list.
There are no indigenous or native people in Antarctica.
There are quite a few species of octopus in the waters around Antarctica. Antarctica was the ancestral home of the octopus millions of years ago and all current otcopus species are descended from that one Antarctic octopus species.
There are no Antarctic tribes as there are no indigenous people in Antarctica.
There is no indigenous population in Antarctica.
There are no indigenous people in Antarctica: igloos are built by humans. Any igloo in Antarctica is probably built by a knowledgeable extreme cold weather survivor team there to support science.
Native Alaskan peoples are indigenous to the geography, and there are no indigenous people in Antarctica.
None. Antarctica has never had indigenous peoples, or animals. It's too cold there to support any kind of food chain -- or animal life.
Animals that breed on Antarctica's beaches are sea animals, and none are noted on any endangered species list.
Adelie penguins are the most common species in Antarctica.
No. This is because there are no native animals that live on the Antarctic continent.