Figure 4 from: Espinasa L, Collins E, Finocchiaro A, Kopp J, Robinson J, Rutkowski J (2016) Incipient regressive evolution of the circadian rhythms of a cave amphipod. Subterranean Biology 20: 1-13. https://doi.org/10.3897/subtbiol.20.10010

Figure 4 - Motor activity followed periods of light or darkness regardless of the time of the day. Individuals on the left (A–C) are the same as individuals on the right (A'–C'). Black boxes indicate periods while in darkness and white boxes indicate illuminated conditions.