Figure 3
From: Do cleaning organisms reduce the stress response of client reef fish?
Temporal variation (mean and SEM) of cortisol levels in holding-water of anthias individuals challenged with an intra-peritoneal injection of porcine ACTH. Holding water was changed at each sampling point so that the fish were on the sampled water always for during 1 hour (i.e. there was no accumulation of cortisol in the holding-water with the progress of the experiment).