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Daily rhythms of Nile grass rats following photoperiodic changes. Representative double-plotted actograms of two grass rats that were housed initially in equatorial photoperiods (EP,12:12hr light/dark) and then exposed to long photoperiods (LP 16:8hr light/dark, left panel), or to short photoperiods (SP, 8:16hr light/dark, right panel). Adapted from (Leach et al., 2013) with copyright permission.
