Bivariate scatterplot with fitted regression lines illustrating the interaction between male body length and maximum speed attained by the control individuals (unfilled circles) and males that had completed 360 s of courtship display (filled circles).

<p>Bivariate scatterplot with fitted regression lines illustrating the interaction between male body length and maximum speed attained by the control individuals (unfilled circles) and males that had completed 360 s of courtship display (filled circles).