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. 2018 Jun 21;6:9. doi: 10.1186/s40462-018-0127-3

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© The Author(s). 2018

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 — Diel and tidal changes in the probability of blacktip reef (a) and grey reef sharks (b) being in a relatively high activity state (state 2). Probabilities were calculated by applying a hidden Markov model to acceleration data. The solid grey lines represent 95% confidence intervals for one tidal state (high tide). For clarity, other tidal confidence intervals have not been included