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Fig. 3. Tail beat kinematics of zebrafish larvae (age 2, 3, 5 and 7 days
post-fertilisation) during cyclic swimming and a slow start (age 2 days).
Lateral position of tail tip (h; black), swimming speed
(
U; thin red line), lateral speed of tail tip (v;
thick red line), angle of incidence (
i; thick blue line) and
angle of attack (a; thin blue line) of the tail over one
tail beat cycle. All values are means based on two (age 7 days) or three tail
beat cycles of one swimming sequence. The grey bars indicate roughly when
swimming speed reaches a maximum during the tail beat cycle. U
is expressed as % deviation from the specific swimming speed averaged over one
complete tail beat (U):
U=(U–U)/U.
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