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. 2013 Nov 13;7:178. doi: 10.3389/fncir.2013.00178

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Copyright © 2013 Sorribes, Þorsteinsson, Arnardóttir, Jóhannesdóttir, Sigurgeirsson, de Polavieja and Karlsson.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Individual survival distributions of zebrafish sleep and wake bout lengths with corresponding stretched exponential and power-law fits. Survivor plots of (left panel) sleep and (right panel) wake bouts in zebrafish for age groups 6–10 days (blue), 4–6 weeks (green), 4–6 months (orange), and 12 months+ (red). Each trace encompasses data from a single fish. On the left panel the axes are shown using semi-log coordinates and stretched exponential fits are overlain each individual distribution in a darker shade. Straight diagonal lines on these plots indicate an exponential distribution of bout lengths. On the right the axes are shown in log–log coordinates and power-law fits are overlain each individual distribution in a darker shade. Straight diagonal lines on these plots indicate a power-law distribution.