Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 450825
Title Robustness to chronic heat stress in laying hens: a meta-analysis
Author(s) Moreri, U.; Zerjal, T.; Rodenburg, T.B.; Narcy, A.; Rousseau, X.; Tixier-Boichard, M.; Mignon-Grasteau, S.
Source In: Proceedings of the 8th European Poultry Genetics Symposium, Venice, Italy, 25 - 29 September, 2013. - Venice, Italy : World's Poultry Science Association (WPSA) - p. 58 - 58.
Event Venice, Italy : World's Poultry Science Association (WPSA) 8th European Poultry Genetics Symposium, Venice, Italy, 2013-09-25/2013-09-27
Department(s) Animal Breeding and Genetics
Behavioural Ecology
WIAS
Publication type Abstract in scientific journal or proceedings
Publication year 2013
Abstract Heat represents a major stress factor in laying hens, but it is difficult to compare published studies, done under very different conditions. A meta-analysis enabled us to make a quantitative review of the results from 100 published papers. Relative effects of four factors (genotype, age, group size and amplitude of temperature variation) were analyzed on feed intake, egg production, egg weight, egg mass and FCR. The GLMselect procedure in SAS was used to select the best model for each trait and to estimate the main effects and their interactions. Daily feed intake, egg mass and hen-day egg production were more sensitive to heat stress as they varied from -16.2% to -19.8% between 20 and 35°C while egg weight and FCR showed less variation (-3.8 to -6.4% between 20 and 35°C). Interactions were most often significant, which reinforces the interest of meta-analysis to summarize literature data. This study highlighted that the impacts of heat stress in laying hens depends on the genotype, age and the amplitude of temperature
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