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. 2016 Jun 22;16:136. doi: 10.1186/s12862-016-0705-1

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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. 4 — Scatterplots of body shape vs. life-history divergence vector scores (derived from the H₂S-term in the MANCOVAs) for (a) each sulfidic complex, and (b–d) pregnant female G. holbrooki from the three sulfide springs (sites 5, 8 and 10) in Florida. (e) Relationship between pairwise F _ST (as a proxy for gene-flow, see Additional file 1: OSM 6) and phenotypic divergence (data for G. affinis not available) and (f) relationship between phenotypic divergence and H₂S-concentrations (data for G. hubbsi not available). Black circles represent sulfidic systems inhabited by Gambusia, grey circles represent sulfidic systems inhabited by Poecilia; numbers correspond to sites as described in Table 1. Regression lines and 95 % CIs in grey are shown for significant correlations (see main text)