Practise IB Biology HL 3.3.10 by interpreting dive-depth and duration data as evidence of marine-mammal swimming and diving adaptation.
Pinnipeds are marine mammals with fins or flippers and include fur seals and sea lions. Some pinnipeds forage for prey near the surface (epipelagic) while others forage on the bottom of the sea (benthic). The graph shows the foraging behaviour and the relative time spent diving while at sea for five pinniped species.
In another study on the Antarctic fur seal (epipelagic), scientists measured the temperature difference between the skin of diving seals and the water at all depths of the dives. The data shown is for one fur seal during one period of dives.
Describe the variations in the
Describe the variations in the characteristics of each successive dive during the period investigated.