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Brazilian Journal of Poultry Science

versão impressa ISSN 1516-635Xversão On-line ISSN 1806-9061

Resumo

MAIORKA, A et al. Influence of Broiler Breeders Age (30 and 60 Weeks) on Embryonic Gastrointestinal Development. Rev. Bras. Cienc. Avic. [online]. 2000, vol.2, n.2, pp.141-148. ISSN 1516-635X.  https://doi.org/10.1590/S1516-635X2000000200003.

This experiment was undertaken with the objective of studying the effect of broiler breeder age on gastrointestinal embryo development starting from the17th day of incubation up to hatching (Experiment 1). Yolk utilization during the first 24 h after hatching in fed and fasted chicks was also investigated (Experiment 2). Fertile eggs (Cobb 500 strain) from broiler breeder aging 30 and 60 weeks were incubated under standard conditions. The findings of this study demonstrated that the development of small intestine and yolk weight in the embryos was not influenced by broiler breeder age. After hatching, the small intestine development was faster for chicks from 60 week-old broiler breeders. In this case, the jejunum growing faster than duodenum and ileum. The presence of feed influenced yolk utilization only in chicks from 30 week-old broiler breeder. This study indicates that broiler breeder age has an important role on embryo gut development and yolk utilization, and is a relevant factor on the chicks growth after hatching.

Palavras-chave : broiler breeders; embryo; incubation; gastrointestinal tract; yolk sac.

        · resumo em Português     · texto em Português

 

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