Locomotor activity rhythms (actograms) of the blow fly, in constant dark at 26 °C (double plotted)

Abstract

<p><b>Copyright information:</b></p><p>Taken from "Effects of 5,7-dihydroxytriptamine (5,7-DHT) on circadian locomotor activity of the blow fly, "</p><p>Journal of Insect Science 2003;3():-.</p><p>Published online 14 May 2003</p><p>PMCID:PMC524654.</p><p>Copyright © 2003. Open access; copyright is maintained by the authors.</p> It shows unperturbated free-running activity with τ = 20.9 h in the pre-treated fly. On Day 9, 0.5 µg of 5,7-DHT in 1µl of insect saline/ascorbic acid was injected (arrow) in early subjective day. This caused phase delay by a few hours. The level of locomotor activity was greatly reduced and period was lengthened to 21.4h. The reduction in activity level started 2 days after drug injection and after 4 more days normal level of locomotor activity was regained. Periodograms for the appropriate sections of the activity records are shown alongside the actograms. Lines are drawn through activity periods for better visual inspection of the phase shifts