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A lack of locomotor activity rhythms inDrosophila melanogaster larvae (Diptera: Drosophilidae) |
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| Authors: | Elena P. Sawin Harold B. Dowse Melanie J. Hamblen-Coyle Jeffery C. Hall Marla B. Sokolowski |
| Affiliation: | (1) Department of Biology, York University, 4700 Keele Street, M3J 1P3 North York, Ontario, Canada;(2) Department of Zoology, University of Maine, 04469 Orono, Maine;(3) Department of Biology, Brandeis University, 02254 Waltham, Massachusetts |
| Abstract: | We examined the locomotor activity ofDrosophila melanogaster for the existence of circadian rhythms, using the wild type and two mutants of theperiod (per) gene,pero andpers. This was accomplished using a newly described apparatus for the recording and measurement of larval path lengths over a 96-h test period. None of the larvae examined exhibited appreciable diel rhythms under cycling conditions of light or temperature. Larvae were also not rhythmic under free-running conditions. Our results suggest that theper gene does not influence an observable locomotor behavioral phenotype in the larval stage of development. |
| Keywords: | circadian rhythms behavior light-dark cycles temperature cycles period mutants |
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