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Pre-oviposition factors influencing the fertility and hatchability in Japanese quail

Indian Agricultural Research Journals

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Title Pre-oviposition factors influencing the fertility and hatchability in Japanese quail
 
Creator NARAHARI, D
MUJEER, K A
RAJINI, R A
 
Subject Embryonic mortality, Fertility, Hatchability, Poultry, Pre-oviposition factors, Quail
 
Description The season of hatch of the Japanese quail eggs had no significant effect on any of the hatchability traits studied. The fertility rate increased in the quail breeders from 8 to 17 weeks of age and reduced gradually thereafter; whereas, the hatchability had started reducing gradually from 8 to 22 weeks of age and remained static thereafter. A 24hr photoperiod to the quail breeders Significantly improved the fertility; but the hatchability was in favour of the 12hr photoperiod. Light in the setter compartment had not improved the hatchability; but shortened the incubation period by 7. 7hr. Breeder male: female ratios, wider than 1.2 significantly reduced the fertility and hatchability and increased the embryonic mortality. The fertility and hatchability rates were higher in the cage system; with proportionate reduction in the early embryonic mortality. Eggs with light greyish blue shells had lower rate of fertility than brown colour eggs; but the hatchabiLty and embryonic mortality were comparable between eggs with different shell colour patterns. For optimal fertility and hatchability, the Japanese quail breeder diet should contain 50 mg of vitamin E and 13 mg of riboflavin/kg diet. Eggs laid during night time (18-6hr) had better hatchability; with proportionate reduction in early embryonic mortality; but had no influence on fertility.
 
Publisher Directorate of Knowledge Management in Agriculture
 
Contributor —
 
Date 2014-02-18
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
—
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/37777
 
Source The Indian Journal of Animal Sciences; Vol 72, No 9 (2002)
0367-8318
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/37777/16937
 
Rights Copyright (c) 2014 The Indian Journal of Animal Sciences