Oviposition Times under Various Light-Dark Cycles in the Domestic Fowl
1980 Volume 17 Issue 3 Pages 146-150
Details
1980 Volume 17 Issue 3 Pages 146-150
The oviposition times of 300 pullets of two strains of White Leghorn at 40 weeks of age which were received for various light regimens were observed by use of automatic recording device.
When the lighting schedule was changed from 14L:10D to 8L:16D, 11L:13D, 14L:10D (unchanged), 19L:5D and 24L:0D, the oviposition times of birds except those under continuous light were adjusted at 3rd or 4th day after treatment. Under continuous light the dispersion of oviposition times became large from 5th day after treatment. Mean oviposition times in each treatment were moved to the time corresponding to the half of increased or decreased hours of lighting.
