Extended Data Fig. 1: Effect of sampling period on thermal tolerance for the three selection treatments.
From: Evolution of warming tolerance alters physiology and life history traits in zebrafish

Due to the Covid-19 outbreak, the fish from each tank were phenotyped over two experimental periods, and the data are separated by phenotyping period. a Acute upper thermal tolerance limit (CTmax; n = individuals in Period 1: Down = 30, Control = 30, Up = 27; and in Period 2: Down = 48, Control = 48, Up = 43), b Acute lower thermal tolerance limit (CTmin; n = individuals in Period 1: Down = 30, Control = 30, Up = 27; and in Period 2: Down = 48, Control = 47, Up = 43), c Thermal tolerance scope (CTmax – CTmin; n = individuals in Period 1: Down = 30, Control = 30, Up = 27; and in Period 2: Down = 48, Control = 47, Up = 43). The fish in period 1 were sampled at 74–76 dpf and the fish in period 2 at 98–100 dpf (Supplementary Fig. 4).