Tracks of 19 Southern Elephant Seals

Tracks of 19 southern elephant seals tagged with FCTDSRDLs
over austral summers from 2009 to 2013 in black. The general
positions of the subantarctic front and the polar front are shown
in green and blue, respectively. The incomplete
track seen off Marion Island is due to the FCTD-SRDL battery
failing after 55 days.