Hatching distribution and embryo mortality of eggs laid by broiler breeders of different ages

dc.creatorAlmeida, J.G.
dc.creatorVieira, Sérgio Luiz
dc.creatorReis, R. N.
dc.creatorBerres, Josemar
dc.creatorBarros, Rafael de
dc.creatorFerreira, Andre Klein
dc.creatorFurtado, Fúlvio Vinícius Foch
dc.date2010-04-16T09:16:09Z
dc.date2008
dc.identifier1516-635X
dc.identifierhttp://hdl.handle.net/10183/20675
dc.identifier000662016
dc.descriptionThis study investigated the hatching distribution of eggs from broiler breeders of different ages in distinct periods of incubation. Eggs were incubated in a single-stage experimental incubator. A number of 3.510 eggs were distributed into 3 treatments with 13 replicates of 90 eggs each. Treatments corresponded to breeder age: young (34 weeks), intermediate-age (44 weeks) and old (72 weeks) breeders. Eggs were transferred to the hatcher at 432 incubation hours, hatching was first checked at 449 hours, after which the number of hatched chicks was counted every 6 hours up to 515 incubation hours. After each count, hatched chicks were removed from the hatcher. Data were submitted to analysis of variance using measures repeated. A significant interaction between breeder age and incubation time was found. The total period required to hatch all incubated fertile eggs was not influenced by breeder age, which, however, affected hatching distribution. Eggs from old breeders hatched later as compared to young and intermediate-age breeders. More than 71% of the eggs had already hatched at 485 incubation hours, and 94% at 491 hours. Eggs laid by old breeders presented higher infertility and total embryo mortality, resulting in lower hatching percentage.
dc.formatapplication/pdf
dc.languageeng
dc.relationRevista brasileira de ciência avícola= Brazilian journal of poultry science. Campinas, SP. Vol. 10, n. 2 (abr./jun. 2008), p. 89-96
dc.rightsOpen Access
dc.subjectFrango de corte
dc.subjectReprodução animal
dc.subjectIncubação
dc.subjectBroiler chicks
dc.subjectEmbryo mortality
dc.subjectIncubation
dc.subjectPost-hatching management
dc.titleHatching distribution and embryo mortality of eggs laid by broiler breeders of different ages
dc.typeArtigo de periódico
dc.typeNacional


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