Fig. 3

Individual movement direction in relation to light organ (LO) exposure and occlusion. Example trajectory of one individual with exposed (blue) and occluded (grey) light organs (A). Light organ exposure and occlusion of all tested individuals (n = 20) during shoaling (B). Differences of swimming direction (C) and speed (D) under both conditions (LO exposed or occluded). Detailed changes of swimming direction (E) and speed (F) three frames before (1–3) and after (4–6) the light organ transition. Data in B to F was obtained from twenty individuals (n = 20). A dynamic fitting with a polynomial, cubic equation was used to additionally plot data in E and F. Significance values are reported as *p < 0.05, **p < 0.01, ***p < 0.001. Data in E and F indicate mean ± SEM