Activity/rest rhythms of Drosophila populations selected for divergent eclosion timing under temperature cues

Abstract

2rhythms. We found that in response to simulated jetlag with temperature cycles, late 3 3 chronotypes (populations selected for predominant emergence during dusk) indeed re-entrain 3 4 faster than early chronotypes (populations selected for predominant emergence during dawn), 3 5 thereby indicating enhanced sensitivity of the activity/rest clock to temperature cues in these 3 6 stocks (entrainment is the synchronisation of internal rhythms to cyclic environmental time-3 7 cues). Additionally, we found that late chronotypes show higher plasticity of phases across 3 8 regimes, day-to-day stability in phases and amplitude of entrainment, all indicative of 3 9 enhanced temperature sensitive activity/rest rhythms. Our results highlight remarkably 4 0 similar organisation principles between emergence and activity/rest rhythms.4 1