Fig. 6

Plasma cortisol (ng mL⁻¹) in juvenile lumpfish prior to and after stress test (confinement) at two water exchange rates (high (H)—1350 L h⁻¹ and low (L)- 450 L h.⁻¹). Mean values which do not share a letter were found to be significantly different (Student Newman-Keuls post hoc test, P < 0.05)