Efeitos do horário de postura de matrizes pesadas sobre o rendimento de incubação / Effects of oviposition time from broiler breeders on the incubation yield
Arq. bras. med. vet. zootec
;
65(4): 1261-1264, Aug. 2013. tab
Article
in Portuguese
| LILACS
| ID: lil-684489
ABSTRACT
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 830 am, 1030 am, 1230 pm, 1430 pm and 1630 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.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Posture
/
Chick Embryo
Limits:
Animals
Language:
Portuguese
Journal:
Arq. bras. med. vet. zootec
Journal subject:
Veterinary Medicine
Year:
2013
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade Federal de Minas Gerais/BR
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