Fig. 4. The mass-specific net cost of transport (COTnet) for chub
mackerel at 18 °C (open squares) and 24 °C (filled squares) as a
function of fish fork length (FL). The lines are the best-fitting
equations: COTnet=-253FL+8387,
r2=0.72, N=12, P<0.001, at 18 °C
(dashed line); COTnet=-31383logFL+46734,
r2=0.48, N=12, P<0.02, at 24 °C
(solid line). At a given fish size, COTnet was greater at 24 than
at 18 °C (ANCOVA; P=0.02), even if the highest point for the 14.0
cm FL mackerel at 24 °C is omitted. Values are means ±
S.E.M.
