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. 2016 May 23;9:300. doi: 10.1186/s13071-016-1576-4

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© Nachev and Sures. 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. 2 — Seasonal pattern of the element concentrations determined for P. laevis (concentrations referred to wet weight). Small squares in the boxes are medians, boxes are interquartile ranges and error bars are interdecile ranges. a Arsenic (As). b Cadmium (Cd). c Copper (Cu). d Lead (Pb). e Zinc (Zn)