Efeitos do horário de postura de matrizes pesadas sobre o rendimento de incubação

• Autor(a) principal: Barbosa,V.M.
• Data de Publicação: 2013
• Outros Autores: Rocha,J.S.R., Pompeu,M.A., Fernandes,M.N.S., Machado,A.C., Cunha,C.E., Cardeal,P.C., Ruiz,L.E.A., Lara,L.J.C., Baião,N.C.
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Arquivo brasileiro de medicina veterinária e zootecnia (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352013000400045
• topic: broiler breeders; embryo development; incubation; time of laying

The effects of oviposition time, which represents different positions of the follicles in a sequence of posture, were studied on egg weight, chick weight, egg weight loss during incubation, hatchability, embryo mortality and infertility . A total of 19, 820 eggs, layed on the same day, from Cobb® broiler breeders aging 46-week-old were used. The eggs were classified according to the oviposition time posture (corresponding to the time of collection) from 8:30 am, 10:30 am, 12:30 pm, 14:30 pm and 16:30 pm, which represented the folowing treatments: 1st, 2nd, 3rd, 4th and 5th collects, respectively. The experimental design was completely randomized with five treatments and 36 repetitions, and each tray of 96 eggs was considered a repetition. The normal and homogeneous data were submitted to analysis of variance and means compared by Tukey test. The non-normal and non-homogeneous averages were compared by Kruskal-Wallis test. It is concluded that the time of egg laying has influence on egg weight and chick weight, but does not affect hatchability, fertility and embryonic development.