Table 1.

Body size, swimming speed range, rate of oxygen uptake regression equations and low-speed observations for the 12 bonito studied

Slow speed observations
Fish numberFL (cm)Mass (g)Speed range (cm s−1)Regression equation for O2 (exponential fit)rElevated O2*Erratic swimming
145.0113060-120y=66.0e0.0214x0.94++
246.5118060-100y=123e0.011x0.59++
349.0143060-90y=0.90e0.0168x0.67
445.5127050-100y=155e0.0091x0.72++
544.5102150-70ND++
646.5115050-80y=3.99e0.0361x0.92++
746.0111050-60ND
850.0149060-100y=188e0.0083x0.90++
949.5128060-90y=0.90e0.0168x0.67++
1046.0106060-110y=41.3e0.027x0.97
1147.5119050-110y=225e0.008x0.70++
1245.098050-70ND++
  • FL, fork length; O2, rate of oxygen uptake.

    ND, Equation and r-value were not determined for individuals swimming at fewer than 3 different speeds.

  • * Elevated O2: the O2 at the slowest speed was not the lowest value recorded for that fish. For details, see text.