Michio Imafuku (JP) & Takashi Haramura (JP) Activity rhythm of drosophila kept in complete darkness for 1300 generations

Scientific research, 2011

The research investigates locomotor activity rhythms of Drosophila melanogaster kept in complete darkness for 700 to 1340 generations. The stock was established in 1954 to investigate long-term effects of darkness on organisms. The activity of flies was recorded under three types of light conditions. In all of these conditions, the experimental dark flies exhibited clear circadian rhythms similar to those of control light flies. The results, together with earlier findings indicate that circadian rhythms of fruit flies are not significantly altered by short-term experience of constant dark conditions. This evidence is in sharp contrast to various genuine cave animals (troglobites) that are known to have weak circadian rhythms. (Source: Imafuku, M.; Haramura, T. Activity rhythm of Drosophila kept in complete darkness for 1300 generations. 2011. Zoological Science 28/3. 195-8.)

Michio Imafuku (JP) & Takashi Haramura (JP)