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Study B3.3.10 (HL)—Swimming adaptations in marine mammals conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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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.

Different species are able to store different amounts of oxygen in their muscle tissues in preparation for diving. The graph shows the relationship between typical dive duration and oxygen storage in tissues in the same five species.

State the oxygen stores for a New Zealand sea lion for a dive of 3.4 minutes.
$\mathrm{cm}^{3} \mathrm{~kg}^{-1}$

$46\left(\mathrm{~cm}^{3} \mathrm{~kg}^{-1}\right)$ (accept answers in the range of $45.5\left(\mathrm{~cm}^{3} \mathrm{~kg}^{-1}\right)$ to $47\left(\mathrm{~cm}^{3} \mathrm{~kg}^{-1}\right)$ )

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IB Biology HL B3.3.10 Hl Swimming Adaptations in Marine Mammals Topic Practice

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