Effect of age upon the reproductive performance of Japanese quails

The present study was carried out to monitor the reproductive traits of Japanese quail breeds reared in Bulgaria. The quail breeds kept at the Poultry Breeding Section at Trakia University: Pharaoh and Manchurian Golden, were used. Breeder flocks consisted of 8 female and 3 male birds. The eggs from each
breed were collected for three consecutive days in the middle of every production month. The incubation was performed under standard conditions in a smallscale
industrial incubator (Victoria-560). For the entire experimental period, 3902 Pharaoh and 3617 Manchurian Golden quail eggs were incubated. The
average percentage of hatched vital quails during the 7-month experimental period was 75.70% in the Pharaoh and 75.97% in the Manchurian Golden breed.
The incubation waste in both breeds consisted mainly of infertile eggs and late embryonic deaths – 18.66% and 18.52% of incubated Pharaoh and Manchurian
Golden eggs, respectively. During the first production month, the hatchability of incubated eggs was statistically significantly lower (P<0.001 in Pharaoh and
P<0.01 in Manchurian Golden quails) mostly due to the late embryonic deaths.

Effect of age upon the reproductive performance of Japanese quails

А. Genchev