Efeitos do horário de postura de matrizes pesadas sobre o rendimento de incubação / Effects of oviposition time from broiler breeders on the incubation yield
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.
Arq. bras. med. vet. zootec;
65(4): 1261-1264, ago. 2013. tab
Artigo
em Português
| VETINDEX
| ID: vti-9757
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.(AU)
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