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. 2010 Oct 26;10:326. doi: 10.1186/1471-2148-10-326

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Copyright ©2010 Barluenga and Meyer; 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/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Plot of the two first axes of the Principal coordinate analyses (PCoA). Each circle represents a single individual and colors reflect species and lake of origin. A. Analysis including all sampled populations (PCoA1 = 44.71%, PCoA2 = 16.54%). B. Analysis excluding the populations from crater Lake Apoyo (PCoA1 = 27.49%, PCoA2 = 20.39%). C. Analysis excluding samples from crater lakes Apoyo, Apoyeque and Asososca León (PCoA1 = 24.67%, PCoA2 = 19.65%). D. Analysis including the samples from the large lakes and Tisma Pond (PCoA1 = 24.04%, PCoA2 = 19.03%).