The white sturgeon of the Nechako River early life stages (embryo, yolk-sac larvae, feeding larvae and juvenile) critical habitats thermal exposure risk for the 1980s (average 1980–89) and under climate change scenarios; SSP2–4.5 and SSP5–8.5 in the 2050s (average between 2050 and 2059s) and 2099s (average between 2090 and 2099) from May to October. A and C) For Embryos, Yolk-sac larvae and feeding larvae in Vanderhoof Braided Section for the period when the life stages are present in the Nechako River. B and D) For Juveniles in other habitats from May to October. The long dashed line indicated a thermal exposure risk of 1. Error bars represent SD.