Fig. 7. The increase in stride length (l) with 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 l 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 stride length (Table 2) for the four corners of each plane. There was no significant effect of temperature on the relationship between l and speed and FL (ANCOVA, P>0.05).