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Fig. 3 Distance moved per minute by 4.5 d old zebrafish (Danio rerio) embryos during the green light-dark locomotion test, after parental exposure to propylthiouracil, PTU (A: blue line, 4 replicates, N = 88), after embryonic exposure (B: red line, 6 replicates, N = 131) or after combined exposure of parents and embryos (C: green line, 5 replicates, N = 104) in comparison to the control (black lines in A-C, 5 replicates, N = 109). Areas shaded in grey represent 95% confidence intervals of the control group, and the bar on top of the figure represents the green colour light or the darkness of each of the 10 min phases of the test.