Fig. 2. Rate of oxygen consumption (_O2) versus swimming speed for all individual chub mackerel at 18 °C (blue symbols) and 24 °C (green symbols). The fork length (FL) and mass of each individual are indicated. The best-fitting regressions for each individual at 18 °C are presented in Table 1, and those for each individual at 24 °C are given in Sepulveda and Dickson (2000).