An experiment was conducted to determine the effect of an essential fatty acid (EFA) deficient diet on growth, immune status and renal morphology of juvenile gilthead sea bream, using two diets: a control diet containing 2% (DW) of n‐3 high unsaturated fatty acid (n‐3 HUFA) and a diet formulated to be deficient in EFA for this species and containing 0.5% DW of n‐3 HUFA (diet NFA). After 9 weeks of feeding the EFA‐deficient die...

Progeny of sea bream Sparus aurata from parents selected for high or low cortisol response to stress also showed similar divergent cortisol response after 48 h of handling and confinement stress. The high response progeny, however, had a lower basal unstimulated cortisol release and ACTH‐stimulated cortisol output in vitro .