Tag El-Din,, T., Ali, M., Ismail, F., Gad, H., Ghonim, A. (2006). EFFECT OF SUPPLEMENTARY LIGHT INTENSITY AND AGE OF FLOCK ON SOME REPRODUCTIVE TRAITS IN DOMYATI DUCKS.. Journal of Animal and Poultry Production, 31(3), 1395-1407. doi: 10.21608/jappmu.2006.235456
T. H. Tag El-Din,; M. A. Ali; F. S. A. Ismail; H. A.M. Gad; A. I.A Ghonim. "EFFECT OF SUPPLEMENTARY LIGHT INTENSITY AND AGE OF FLOCK ON SOME REPRODUCTIVE TRAITS IN DOMYATI DUCKS.". Journal of Animal and Poultry Production, 31, 3, 2006, 1395-1407. doi: 10.21608/jappmu.2006.235456
Tag El-Din,, T., Ali, M., Ismail, F., Gad, H., Ghonim, A. (2006). 'EFFECT OF SUPPLEMENTARY LIGHT INTENSITY AND AGE OF FLOCK ON SOME REPRODUCTIVE TRAITS IN DOMYATI DUCKS.', Journal of Animal and Poultry Production, 31(3), pp. 1395-1407. doi: 10.21608/jappmu.2006.235456
Tag El-Din,, T., Ali, M., Ismail, F., Gad, H., Ghonim, A. EFFECT OF SUPPLEMENTARY LIGHT INTENSITY AND AGE OF FLOCK ON SOME REPRODUCTIVE TRAITS IN DOMYATI DUCKS.. Journal of Animal and Poultry Production, 2006; 31(3): 1395-1407. doi: 10.21608/jappmu.2006.235456
EFFECT OF SUPPLEMENTARY LIGHT INTENSITY AND AGE OF FLOCK ON SOME REPRODUCTIVE TRAITS IN DOMYATI DUCKS.
1Department of Poultry Production, Faculty of Agric., Mansoura Univ.
2Animal Production Research Institute, Ministry of Agriculture. Giza.
Abstract
An experiment was conducted to examine the effects of supplementary
light intensity level on the reproductive performance of artificially-inseminated
Domyati duck hens at different ages. One hundred and four. eighteen-week-old
Domyati ducks were randomly distributed into four groups of 6 duck drakes and 20
duck hens each, housed separate in floor pens, and exposed to a daily
photoperiod of 17 hours up to the end of the experimental period at 60 weeks of age.
To maintain this daily 17-hour photoperiod. the length of natural daylight was
supplemented with artificial light, providing light intensity levels of 1.5 (served as a
control), 10, 45 or 90 lux at birds' head level of the four experimental groups
respectively. At 32, 40 and 60 weeks of age, drakes' semen was collected and
evaluated (as ejaculate volume, sperms‘ mass and advanced motility, sperms
concentration, and percentage of dead, abnormal, coiled-tail and clumped Sperms),
duck hens were artificially-inseminated, and eggs fertility and hatchability were
determined. Regardless of age, increasing supplementary light intensity level from
1.5 to 90 lux significantly increased eggs fertllity and hatchability, and improved
semen quality traits, but had no effect on ejaculate volume. Apart from the effect of
supplementary light intensity level, similar improvement was observed in drakes'
semen quality with advancing age from 32 to 60 weeks. Inconsistent improvement
was observed, however, in eggs fertility and hatchability as experimental birds
advanced in age. At 32 and 60 weeks of age significantly higher egg fertility
percentages were observed than at 40 weeks, whereas at 32 and 40 weeks of age
significantly higher hatchability percentages were obtained than at 60 weeks. The
effects of supplementary light intensity level and age were significantly interrelated
for eggs fertility and hatchability, as well as for all semen quality traits studied. except
for ejaculate volume and percent of dead sperms. The best economic efficiency of
incubation process was obtained at 40 weeks of age With duck exposed to a
supplementary light intensity level of 10 lux.
It would be concluded that; economically, the use of a supplementary
light intensity level of 10 lux is sufficient to achieve satisfactory percentages of
fertility and hatchability for eggs of artificially-inseminated Domyati ducks. Most of
semen quality traits were also improved under this supplementary light intensity level.
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