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. 2021 Sep 23;11:18941. doi: 10.1038/s41598-021-97986-x

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Results of post-hoc tests in the interval experiment. The graph shows the estimated coefficients and 95% confidence intervals of six experimental pairs when comparing the difference in ‘light-on’ vs ‘light-off’ to the control (‘light-off’ vs ‘light-off’, dashed line). It showed that both 20-min treatments, as well as the 10-min bright treatment, had a significant effect on the number of birds, whereas the 10-min dimmed treatment and both 1-min treatments did not. For detailed statistics, see Table 2.