Figure 1.

a–l. Concentrations of hormones extracted from skin of five bottlenose dolphins, with days relative to the stress test given as the central point in time between the extremes of any pooled samples. a–f show all available data points, each representing skin samples collected over the course of 1–20 days (n = 41 aggregate samples; mean number of days combined for each sample = 7; S.D. = 5.6). g–l show the data points which were collected over a maximum of 7 days (n = 29 aggregate samples; mean number of days combined for each sample = 4; S.D. = 2.3)