Total haemoglobin content measured in µmol/L in the 30 genotypes of Daphnia magna studied here at the control temperature (20C) and after exposure to hyper-thermal stress (30C). Genotype ID, population ID, average Hb content across three replicates and log2 fold change of total Hb content between the two experimental temperatures are shown. The Hb data are From Cambronero et al. 2017