Effect of Hatching Time on Yolk Sac Percentage and Broiler Live Performance
Özlü S. 1, Shiranjang R. 1, Elibol O. 1, Brake J. 2. / 1 Department of Animal Science, Faculty of Agriculture, University of Ankara, Ankara 06110, Turkey; 2 Prestage Department of Poultry Science, North Carolina State University, Raleigh, NC 27695-7608, USA.
INTRODUCTIONThere has always been a natural biological variation in the time that commercial broiler chicks emerged from their egg shells (hatch time) even under optimum conditions of artificial incubation. Thus, early hatching chicks have generally remained in the hatcher longer while awaiting removal of later hatching chicks from the machine (pull time) (Elibol et al., 2011; Powell et al., 2016)...