Figure 5. Diving strip-chart for adult female southern elephant seal from Bouvetøya.

Stripchart represents a 40-day period during the early stage of the post-moult trip. Black filled circles represent the maximum depths of individual dives. Vertical broken lines represent local midnight. The solid and broken red lines represent the time-weighted means and standard deviations of the depth of the sub-surface water temperature maximum, corresponding to Circumpolar Deep Water (CDW) or Weddell Sea Deep Water (WSDW) depending on the geographic location. The temperature profile on the right corresponds to data collected during the deepest dive of this 40-day period (registered 2^nd Apr).