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. 2014 Mar 28;14:65. doi: 10.1186/1471-2148-14-65

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Copyright © 2014 Maroja et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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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).