| Identification of critical periods for turning broiler hatching eggs during incubation. | |
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MedLine Citation:
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PMID: 15623216 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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(1) Fertile hatchability was superior from a broiler breeder flock at 29 weeks of age than at 68 weeks of age because of decreased mortality at all stages of embryo development. (2) Eggs that were either turned or not turned during the 0 to 7 d, 8 to 14 d and 15 to 18 d periods in the 8 possible combinations showed that the absence of turning from 0 to 7 d of incubation caused a decrease in fertile hatchability and an increase in all stages of embryonic mortality, and an incidence of Malposition II (head in small end of shell) that was more pronounced in a 68-week-old flock than a 29-week-old flock. (3) When eggs from 33- and 35-week-old broiler breeder flocks were either turned or not turned from 0 to 2 d, 3 to 4 d, 5 to 6 d or 7 to 8 d in the 16 possible combinations, the absence of turning from 3 to 8 d, or 0 to 2 d alone or in combination with other time periods reduced fertile hatchability and increased embryonic mortality and percentage of Malposition II. (4) The most critical period for turning commercial broiler hatching eggs during incubation was from 0 to 7 d with the single most critical 2-d period being 0 to 2 d. |
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Authors:
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O Elibol; J Brake |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: British poultry science Volume: 45 ISSN: 0007-1668 ISO Abbreviation: Br. Poult. Sci. Publication Date: 2004 Oct |
Date Detail:
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Created Date: 2004-12-29 Completed Date: 2005-01-18 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 15740290R Medline TA: Br Poult Sci Country: England |
Other Details:
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Languages: eng Pagination: 631-7 Citation Subset: IM |
Affiliation:
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Department of Animal Science, Faculty of Agriculture, University of Ankara, Ankara, Turkey. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Agriculture
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methods* Animals Chick Embryo / growth & development* Female Incubators / veterinary Male Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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