Document Detail


Model for the prediction of mean time of oviposition for hens kept in different light and dark cycles.
MedLine Citation:
PMID:  3409068     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
1. Evidence from 26 short-term experiments with laying fowls has been analysed to determine the relationship between onset of darkness and mean time of oviposition for light-dark cycles ranging from 21 h to 30 h incorporating various dark periods from 5 h up to 23 h. 2. When the light-dark cycle is equal to or longer than 24 h, mean time of lay (H) in hours from onset of darkness is predicted by the equation: H = 64.62-2.161C + 0.268S, where C = cycle length (h) and S = scotoperiod (h) (multiple correlation coefficient = 0.977). 3. For light-dark cycles shorter than 24 h, the best equation found was: H = -4.97 + 0.740C + 4.482S - 0.175CS (multiple correlation coefficient = 0.981). 4. The meaning of these equations in relation to events in the ovulation cycle of the fowl is discussed.
Authors:
B M Bhatti; T R Morris
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  British poultry science     Volume:  29     ISSN:  0007-1668     ISO Abbreviation:  Br. Poult. Sci.     Publication Date:  1988 Jun 
Date Detail:
Created Date:  1988-10-12     Completed Date:  1988-10-12     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  15740290R     Medline TA:  Br Poult Sci     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  205-13     Citation Subset:  IM    
Affiliation:
Department of Agriculture and Horticulture, University of Reading, England.
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MeSH Terms
Descriptor/Qualifier:
Animals
Chickens / physiology*
Darkness
Female
Light*
Models, Biological*
Oviposition*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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