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Effects of egg storage period on hatching egg quality, hatchability, chick quality and relative growth in Pekin ducks
(Eugen Ulmer Gmbh Co, 2007) Onbaşılar, E. E.; Poyraz, I.; Erdem, E.
A total of 864 incubating eggs produced by a Pekin duck breeder flock (Star 52- Grimaud Freres) were used to determine effects of different storage periods (0, 3, 7, 11 d) on egg quality, hatchability, duckling quality and relative growth (RG) at the end of 7 d rearing. Egg albumen index and Haugh unit were decreased, egg albumen pH and yolk pH were increased by length of egg storage period. Hatchability was decreased and early embryonic death was increased from eggs stored for 11 d. Egg weight loss, apparent fertility, middle and late embryonic death were not significantly affected by storage. Duck eggs stored for 0 and 3 d increased hatchability results and RG of ducklings. The percentage of ducklings with quality score of 100 was lower in eggs stored for 11 d (P<0.001). Ducklings with quality scores of 100 had significantly higher RG compared with those having quality scores less than 100. RG of ducklings with scores of 100 was lower in eggs stored for 11 d (P<0.001). It is recommended that storage period of Pekin duck eggs should not be longer than 7 days.