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. 2016 Jun 29;13:30. doi: 10.1186/s12983-016-0162-0

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© The Author(s). 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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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Fig. 5 — Intraspecific covariation between morphological traits and altitude within P. major. Correlations of altitude with body weight, body length, culmen length and PC1 of body morphology are shown. Each dot represents an individual P. major specimen. Lines represent ordinary least square (OLS) regressions