Drosophila locomotor activity is a robust and quantitative measurement of circadian photo-responses. We describe protocols for designing behavior experiments for circadian photo-responses and analyzing the data. Studying the circadian photo-responses is important for dissecting the neuronal and molecular mechanisms of light entrainment.
Zhang, Y., Pang, X., Liu, Z. Analysis of Circadian Photoresponses in Drosophila Using Locomotor Activity. J. Vis. Exp. (Pending Publication), e53865, doi: (2015).