Figure 2

Reproductive success. Beetles were crossed (1♂ × 1♀) between monogamous (M) and polyandrous (P) selection lines in two contrasting (benign vs. stressful) environments: a) standard quality food = white flour with 10% yeast and b) low quality food = white flour with 1% yeast. Note the different scales. Each data point represents the mean ± 1 SE of three cross types (n = 10–20 pairs per cross type).