Efeitos do horário de postura de matrizes pesadas sobre o rendimento de incubação
AUTOR(ES)
Barbosa, V.M., 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.
FONTE
Arq. Bras. Med. Vet. Zootec.
DATA DE PUBLICAÇÃO
2013-08
RESUMO
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.
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