Figure 4

Principal component analysis of CHC profiles. a) CHC abundance and b) CHC composition (each male point represents multiple individuals of identical composition of both species). Colors represent populations: G. firmus, the beach cricket, is shown in sand colors yellow (Guilford, CT) and orange (Pt Judith, RI) while the inland field cricket, G. pennsylvanicus, is shown in green (Ithaca, NY) and light green (Pownal, VT). For CHC abundance there are significant differences between sexes and species for both males and females. For CHC composition (presence absence of peaks), only females had significant differences between species (males had similar composition, Figure 3).