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Fig. 5. Visualisation of the spatial extent of the fish's wakes. For this figure,
each vector field was reduced to a row by averaging over the columns of the
vector field, and the rows resulting from this procedure were assembled in
temporal order. Note that the velocity scale does not cover the complete range
of measured values (cf. Figs 3,
4 and
Table 1) in order to resolve
the low velocities in the aged trail. A shows two Lepomis wakes, B
shows two Colomesus wakes and C shows two Thysochromis wakes
(see Table 1 for survey of
trials).
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