Table S1. At-sea distribution metrics for the 8 juvenile emperor penguins equipped with ARGOS platforms at Atka Bay. from Juvenile emperor penguin range calls for extended conservation measures in the Southern Ocean

* Yearly travelled distance was computed using one location every 6 hours (in km), ** % of time spent within the main oceanographic features (ACC, SO-TL) and conservation related areas (IUCN-EOO, MPAs) of the Southern Ocean during the trip duration, *** in days. ACC: Antarctic Circumpolar Current; SO-TL: Southern Ocean Treaty Limits (i.e. at the parallel of 60°S as defined in the Antarctic Treaty); IUCN-EOO: International Union for Conservation of Nature Extent Of Occurrence (i.e. the extent of occurrence of the species considered by the IUCN 1; WSMPA: Weddell Sea Marine Protected Area; SGSSIMPA: South Georgia and Sandwich Islands Marine Protected Area.