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Fig. 11. Modeled changes in (A) total mechanical work stroke1 and
(B) cumulative total work, throughout descent by a Brünnich's guillemot
with the respiratory volume at the water surface assumed in all other
simulations in this paper (`standard', 0.153 l), and with respiratory volume
at the surface increased and decreased by 60%. Total mechanical work for
entire dives is annotated in the lower figure.