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. 2016 Oct 4;6:34264. doi: 10.1038/srep34264

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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For each animal an actogram and a histogram illustrate its light exposure pattern. Actograms (upper graphs) show times of daily light exposure episodes (white vertical bars against a gray background) and consecutive days are shown below each other. Civil twilight times are demarked with vertical dashed lines. Downward and upward pointing triangles indicate the times of release and recapture from the enclosure, respectively. Histograms (lower graphs) show the summed light exposure of all days in the field enclosure for each animal, throughout the 24 hours of the day. Animals #153-155 were recorded in July 2014 and #180-188 in July 2015.