Fig. 5. The dependence of tail-beat frequency on both swimming speed and fish fork
length (FL) in chub mackerel at 18 °C (blue plane and symbols)
and 24 °C (green plane and symbols). Each symbol indicates the tail-beat
frequency versus speed data for one individual. The maximum and
minimum values of speed and FL at 18 and 24 °C were used to solve
the multiple regression equation for tail-beat frequency
(Table 2) for the four corners
of each plane. There was no significant effect of temperature on the
relationship between tail-beat frequency and speed and FL (ANCOVA,
P<0.05).
