Broiler performance and bone strength minimally affected by either a simulated dusk or night-interruption photoperiod
South African Journal of Animal Sciences
Animal and Poultry Science, School of Agricultural Sciences and Agribusiness, University of KwaZulu-Natal, Scottsville 3209, South Africa; Czech University of Life Sciences Prague, 165 21 Prague 6 - Suchdol, Czech Republic, Czech Republic
Two genotypes of male broilers were given 12 h of daily illumination; as a conventional photoperiod, with the final hour at reduced illuminance to simulate dusk, or with 1 h of the light given during the middle of the night. The lighting modifications had no significant effect on any performance variable or on tibial breaking strength. Feed intake was unaffected by the lighting treatments during either the 1-h dusk period or the night, but was inexplicably stimulated in the both experimental groups during the main photoperiod. © South African Society for Animal Science.