Fig. 1

D. melanogaster females exposed to con- or heterospecific females prior to mating show significantly decreased post-mating fecundity. Females were kept socially isolated (‘isolation’) or exposed to con- (‘group’) or heterospecific females (‘group:simulans’ or ‘group:yakuba’) for 72h prior to mating. Fecundity was measured as the number of eggs laid by each female in the 24-h period following mating. Boxplots show interquartile range (IQR) and median in the box, and whiskers represent the largest and smallest values within 1.5 times the IQR above and below the 75th and 25th percentiles, respectively. Raw data points are plotted with a jitter. p-values between treatments were derived from the model summary