Figure 2

Amounts of cuticular hydrocarbons (CHCs) per individual. Nanogram quantities of each CHC are given with standard errors for Drosophila simulans and D. sechellia females, hybrids of the cross between D. simulans females with D. sechellia males and backcrosses of hybrid females to D. simulans. All values were corrected for the amount of standard recovered for each individual. The sample sizes are given below each bar. Different letters above each bar indicate statistically significant differences between pairs of female types by Wilcoxon's signed-ranks tests with Bonferroni correction for multiple tests.