Figure 2. Weekly odor sample compositions and the relative amounts of two male specific substances exemplarily.

For reasons of graphic power, we averaged the samples over individual, age and week. The graph shows the weekly odor sample compositions (a) of juvenile (open symbols) and adult (closed symbols) male S. bilineata prior (circles), during (triangles), and after the mating season (squares) and the relative amounts of two male specific substances (b,c). The two-dimensional non-metric Multidimensional Scaling (nMDS) plot of odorant composition is based on the Bray-Curtis Similarity indices, i.e. the closer the samples appear on the plot, the more similar the samples are. The bigger the bubble is, the higher the relative amount of the specific substance. The orientation in a nMDS is arbitrariness and axes are dimensionless.