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. 2021 Oct 1;12:738471. doi: 10.3389/fphys.2021.738471

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Copyright © 2021 Flôres, Jannetti, Improta, Tachinardi, Valentinuzzi and Oda.

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) and the copyright owner(s) 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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Daily light exposure and activity patterns of individual tuco-tucos released in semi-natural enclosures from summer to winter. Actograms are positioned according to the annual timescale. The duration of the recordings was different for each animal. Left: Four shorter recordings (10 days), from individuals released in the enclosures throughout 2017, showing light exposure (white marks) and simultaneously recorded general activity (black marks). Green horizontal arrows indicate field-activity duration of each animal—#238 (Feb): 13.8 ± 1.7 h; #249 (Mar): 14.1 ± 0.8 h; #220 (May): 12.3 ± 0.5 h; #238 (Jun): 11 ± 0.5 h. Summer and winter field-activity durations were statistically different (n = 6, Student’s t-test p = 0.02). Right: Two individuals with long term recordings of light exposure (white marks)—#177 from January to June 2015 and #193 from March to June 2016. Light exposure records indicate the time of surface emergences during sunlight hours (between civil twilight limits—blue vertical lines). Data of animals #177, #193, #220, #238 were taken from Jannetti et al. (2019).