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. 2016 Jan 20;3(1):150665. doi: 10.1098/rsos.150665

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© 2016 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 1. — Sampling site characteristics. The height and type of the fishway in the first segment are different from the upstream segments. Fish from the group 0A and 1A are from the same segment, but caught when expressing different behaviour (remaining hidden in the substrate (0A) or ascending the fishway (1A)). Sampling size of the studied groups: 0A=11, 1A=9, 3A=15, 4A=14. Owing to the insufficient sampling size of the 2A group, fish from the second segment were not included in the study.