Table 1 Predicted and observed response to selection for increased warming tolerance for mechanisms hypothesized to limit warming tolerance

From: Evolution of warming tolerance alters physiology and life history traits in zebrafish

Limiting mechanism

Predicted response

Observed response

Oxygen supply capacity

Increased aerobic scope (Fig. 1a)

No (Fig. 3c)

Decreased Q10 (Fig. 1b)

No (Fig. 3d)

Thermal optimum of molecules

Decreased CTmin (Fig. 1c)

No (Fig. 2b)

Heat shock response

Increased CTmin (Fig. 1d)

Yes (Fig. 2b)

Increased HSP levels

No (Fig. 4h)