Figure 2:

Critical thermal maximum (CTMax) throughout development in four rearing treatments: 10°C Normoxia (green circle), 10°C Hypoxia (blue square), 14°C Normoxia (yellow) and 14°C Hypoxia (red diamond). Average CTMax ± S.E.M. is given for n = 16 individuals per treatment (n = 15 10°C normoxia alevins, n = 8 14°C normoxia fry) at each developmental stage. Within each panel CTMax is defined as (A) the temperature at which the heart beat stopped (embryonic stages, eyed and silver eyed) and (B) the temperature at which equilibrium was lost (larval stages, alevin and fry). Letters indicate significant (P < 0.05) differences between treatments within a given developmental stage. Asterisks indicate significant (P < 0.05) differences between developmental stages within a single treatment.