Relative abundance of total bacteria and the target genera Aeromonas and Acinetobacter in whole salmon larvae between stress treatment groups at an earlier stage of the experiment (748 degree days; 5 weeks post hatch), quantified using qPCR. For visualisation, all values of relative abundance have been normalised by the mean of values in the control group, for that assay. Asterisks indicate significant difference from the control group; * P < 0.05, **P < 0.01, ***P < 0.001.