Fig. 4

Light reverses changes in locomotor profiles during local and outward swimming. a Rate of re-orienting (meander) for larvae measured for 5 min after loss of illumination, either in constant darkness (black circles, N = 25), or when illumination was restored after 30 s darkness (orange triangles, N = 22). * P < 0.05 for corresponding time-points in sustained dark and after re-activation of the light. b Meander for larvae measured for 10 min after loss of illumination, with darkness maintained (black triangles) except during 1 min, when the light was re-activated (orange triangles). N = 19. * P < 0.05 compared to constant illumination. Dashed lines in (a, b) indicate mean meander for larvae measured during constant illumination