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. 2019 Mar 27;13:55. doi: 10.3389/fnbeh.2019.00055

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Copyright © 2019 Boyer, Jaouen, Ibrahim and Gascon.

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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Results of 20-h activity monitoring in the PhenoTyper. (A) No differences were detected in the total time spent feeding (left panel) and drinking (right panel) between 3- and 9-month-old mice (3 months, feeding 2,530 ± 349.7 s, drinking 701.1 ± 46.49 s; 9 months, feeding 2,142 ± 356.0 s, drinking 565.8 ± 44.60 s). (B) Young and middle-aged mice showed a similar food and water consumption (3 months, food 5.91 ± 0.94 g, water 8.29 ± 0.47 ml; 9 months, food 6.18 ± 0.87 g, water 8.39 ± 0.57 ml). (C) The cumulative time spent in the shelter did not change in 3- vs. 9-month-old mice (3 months, 10,210 ± 3,070 s; 9 months, 14,870 ± 3,359 s).