PolE At Sea Observations of Birds and Marine Mammals during PS 81 (ANT-XXIX/4)

During the PS81 (ANT-XXIX/4) expedition of icebreaking RV Polarstern from Punta Arenas to the North Scotia Sea Ridge, South Georgia, and the South Sandwich Trench and back to the Falkland Islands from 22 March till 26 April 2013, three independent datasets were collected in order to establish the quantitative at-sea distribution of marine mammals and seabirds.