Fig. 6. Total cost of transport (TCOT), the amount of energy expended per unit mass
per unit distance, as a function of swimming speed for the triggerfish
Rhinecanthus aculeatus and the parrotfish Scarus schlegeli.
TCOT was calculated from the relationship between total
O2 and swimming
speed presented in Figs 4A and
5A. Lines in blue are for
median-paired fin (MPF), rigid-body swimming, and the line (triggerfish) and
symbols (parrotfish) in red are for body-caudal (BCF), undulatory swimming.
Symbols for parrotfish BCF swimming are the same as in
Fig. 4.
