Rieger, Dirk and Fraunholz, Christina and Popp, Jochen and Bichler, Dorninik and Dittmann, Rainer and Helfrich-Foerster, Charlotte (2007) The fruit fly Drosophila melangaster favors dim light and times its activity peaks to early dawn and late dusk. JOURNAL OF BIOLOGICAL RHYTHMS, 22 (5). pp. 387-399. ISSN 0748-7304,
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The light preferences of fruit flies were tested by 2 different means. First, flies were allowed to choose between different illuminations, and their favorite resting, grooming, and feeding places were determined with an infrared-sensitive camera. Second, the activity levels of the animals during their main daily activity period were determined photoelectrically (via infrared light beams) under different light intensities. Both methods revealed that the flies prefer dim light. They rested, groomed, and fed preferentially in places with a light intensity between 5 and 10 lux, and they showed the highest activity level when the light intensity during the day was kept at 10 lux. Furthermore, when dawn and dusk were simulated by logarithmically increasing/decreasing the light intensity during a 1.5-h interval, the flies' activity maxima occurred at about 7.5 lux during early dawn and late dusk. The results suggest that fruit flies time their clocks by early dawn and late dusk and avoid bright light during the day.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LOCOMOTOR-ACTIVITY RHYTHM; DAY-LENGTH; CIRCADIAN ENTRAINMENT; MELANOGASTER; PHOTOTAXIS; TWILIGHTS; MUTANTS; CLOCK; HERITABILITY; TEMPERATURE; diurnal rhythms; dawn and dusk; dim light; Drosophila melanogaster; activity; feeding |
| Subjects: | 500 Science > 580 Botanical sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Zoologie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Dec 2020 08:20 |
| Last Modified: | 01 Dec 2020 08:20 |
| URI: | https://pred.uni-regensburg.de/id/eprint/32134 |
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