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. 2016 Sep 17;13:42. doi: 10.1186/s12983-016-0173-x

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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 — Actograms and scalograms of a juvenile (a) and adult (b) captive grizzly bear during winter dormancy under DD conditions or when exposed to a symmetrical (1 h light/11 h dark) twice daily light regimen (1:11:1:11). Blue and magenta lines represent the fitted midpoints of activity during each successive period. These are not the same bears shown in Figs. 1 and 2. Note the shorter FRP in the juvenile bear (blue line angled left) compared to the longer FRP in the adult bear (blue line angled right); a 24 h FRP would be represented by a completely vertical line