Figure 8

Figure 8

Analysis of multiple trajectories by female and male zebrafish during motivated trials. The median yaw angle (A) and velocity (B) of turn triggered averages plotted against time. The solid line represents the median of all individuals, shaded areas represents 95% confidence interval. Females are represented by the orange color, males by a blue color. Yaw to the left/right is indicated by positive/ negative numbers, respectively. The yaw angle over time is equal between male and female. Males exhibit higher maximal velocities compared to females. (C) The triggered average of all spikes of propulsion is plotted against time. The shaded area represents standard deviation from the mean. There is no significant difference in the propulsion and gliding motion of male and female. (D–I) show the quantification of different types of locomotion in the form of box plots. The black line represents the median of all individuals, the box displays the upper and lower quartile, the whiskers denote 1.5 times the interquartile distance and the plus-signs mark the outliers. Color is coded as in A. (D,E) The saccadic peak velocity of females as compared to males is significantly lower, while there is no significant difference in the saccade frequency between the two. (F,G) The median thrust and slip velocities of male fish are significantly higher as compared to the females. (H) There is no difference in the body-bending angle during acceleration. (I) There is a significant decrease in the frequency of thrust stroke of females as compared to males. The data set consists of 59 males and 43 females. Statistic significance was tested with Fisher's exact permutation test on different medians. ***p < 0.001, **p < 0.01.