Expression of stress-related genes was investigated in the marine copepod Acartia tonsa in relation to heatshock at two different salinities (10 and 32‰), and it was furthermore investigated whether experimen-tally induced epibiont infestation led to elevated expression of stress-related genes. Expression of thegenes ferritin, Hsp90 and Hsp70 were analyzed in adult copepods by conducting reve…