Study on the effect of egg size, age of hen and storage period on fertility, hatchability, embryo mortality and chick malformations in japanese quails (coturnix coturnix japonica)

This study was conducted to investigate the effect of egg size, age of hen and storage period of eggs before incubation on fertility, hatchability, embryo mortality and chick malformations in Japanese quails (Coturnix coturnix japonica). The study was carried out in quail farm located at Tanah Merah, Kelantan. Totally 1441 eggs of quail were set into the incubator by applying 9 treatments groups: 3 groups for egg size (6-7 g, 8-9 g and 10-11 g ) , 3 groups for hen age ( ≥ 3 - <5 month, ≥5 - <8 month and ≥8 - <10 month ) and 3 groups for egg storage period ( ≥ 4 - ≤6 days, ≥7 - ≤9 days and ≥10 - ≤14 days) . Analysis of Variance (ANOVA) revealed that the egg size had highly significant (P< 0.01) effect on hatchability and embryo mortality in quails and was not found to be significant (P> 0.05) on fertility and chick malformations. The age of hen had insignificant (P> 0.05) effect on every aspect except fertility. Otherwise, the storage period had highly significant (P< 0.01) effect on fertility, hatchability and embryo mortality rate and insignificant (P> 0.05) on chick malformations. Results from this study concluded that heavy egg weight (10-11 g), middle hen age (≥5 - <8 month) and shortest storage period (≥4 - < 6 days) gave the best hatching performances.