Figure 4

Surface-activity pattern of three species in LD, DD and DL cycles. Double-plotted actograms represent the normalized mean activity of individuals of (a) Gegeneophis tejaswini (n = 5), (b) Ichthyophis cf. longicephalus (n = 3) and (c) Uraeotyphlus cf. oxyurus (n = 5). Activity was normalized in Actogram J using a reference actogram. Actograms with the greatest activity were used as the reference actogram for each species. The white and gray background indicates the light and dark phases, respectively, in three cycles.