Authors : M. Sato , T. Tachibana , A. Tsukada and M. Furuse
Abstract: Plasma Prolactin (PRL) and Corticosterone (CORT) concentrations in broiler- and layer-type chickens were compared during embryonic development (14 and 18 days of incubation (E14 and E18)) and at hatch (P0). Plasma PRL concentrations were comparable and kept low in both types during embryonic development, but the value sharply increased at P0 with special reference to layers. Plasma CORT concentrations were similar and gradually increased toward P0 in both types and the values in layers were higher than in broilers at P0. The results obtained here suggest that plasma PRL and CORT concentrations were influenced by genetic selection just after hatching, but not during embryonic development.
M. Sato , T. Tachibana , A. Tsukada and M. Furuse , 2007. Plasma Prolactin and Corticosterone Concentrations Are Changing Toward Hatch with a Different Manner Between Layer- and Broiler-Type Chickens . Journal of Animal and Veterinary Advances, 6: 923-926.