Effect of a cranium-directed daily illumination cycle on the laying rhythm in Japanese quail
2003
Abstract This study tests the effect on the laying rhythm of a light cycle reaching directly the encephala via a diode in Japanese quail maintained in constant darkness. In DD, all the birds expressed their free-running laying rhythm (period close to 25 h). When the diode is switched on 14 h per 24 h cycle, females showed the same organization as in LD with the same laying time. Thus, a photoperiodic cycle, where light was only perceived through the skull of the female quail, could synchronize its laying rhythm. This device with a LED is an interesting alternative solution to eye-patching or blinding of birds. To cite this article: C. Houdelier et al., C. R. Biologies 326 (2003).
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