Fig. 3.

a N2 larvae grow faster in the presence of JU1410-derived pheromone when the bacterial food source is live so that at 36 h worms are bigger in the presence of pheromone (t(50.5) = −7.864, P < 0.001), and this difference continues into adulthood (Table 1). The growth-promoting effect of pheromone depends on the bacterial food source being alive, since with a dead food source pheromone treatment does not affect worm size at 36 h (t(78.6) = −1.5712, P = 0.12), or at any other times, except for 72 h (t(80) = −3.03, P = 0.003; Table 1). The boxplot shows the median worm length (horizontal line) and the box shows the inter-quartile range, with the lower whisker showing the lower quartile minus 1.5 times the interquartile range, and the upper whisker the upper quartile plus 1.5 times the interquartile range, with outliers shown as points. b The daily fecundity of N2 (± 1 standard deviation) in the presence or absence of JU1410-derived pheromone with a dead bacterial food source. Reproduction varies across the four days of reproduction (Day d.f. = 5, χ² = 11,534, P < 0.001) and there is a significant Treatment x Day interaction (d.f. = 10, χ² = 1795, P < 0.001), showing that PDRP occurs