Géographie historique de la poule en zones urbaines françaises
International audience
Effect of Modified-Hen-Egg-Yolk-Lipid-Composition Diet on Plasma Lipids in Rats
Published in Macedonian Veterinary Review
This study aimed to investigate the effects of dietary supplementation with modified-hen-egg-yolk on plasma lipids and lipoprotein profiles in rats. During the four-week-experiment, 64 Wistar rats were divided into four groups of 16 (eight of both sexes), and fed commercial rat food (group C); food containing 70% commercial rat mixture and 30% fres...
Assessments of productive performance, eggshell quality, excreta moisture, and incubation traits of laying breeder hens ...
Published in Frontiers in Veterinary Science
A study was conducted to evaluate performance, eggshell quality, nutrient metabolizability, and incubation traits of laying breeder hens fed diets supplemented with an additive containing polyphenols and saponins of a proprietary blend from Quillaja saponaria and Yucca schidigera (QY) biomass. Hens were fed 4 feeds in 5 periods of 28 days each from...
Hierarchical structure and feeding behaviours of free-range hens (Gallus gallus domesticus).
Chickens (Gallus gallus domesticus) are a social species and will form a hierarchy through agonistic dyadic encounters. This hierarchy will affect how different members of the flock access food, which may affect the specific feeding behaviours of the hens. The hierarchy of a 20-hen flock was determined by analysing videoed dyadic encounters between...
Sveriges första barnbok med hen : normkritik och didaktik i Kivi & Monsterhund
Around 2007, several self-proclaimed norm-critical publishing companies were established in Sweden. This caused a long debate in the daily press, where some critics compared the ”norm-critical” books to propaganda. The debate indicates a conflict between an aesthetic and a didactic approach to children’s literature. Another lively debate with simil...
Lipid metabolism and body composition in long-term producing hens
SUMMARY: The lifetime egg production capacity of laying hens (i.e. laying persistency) has increased tremendously in the last 50 years from 220 eggs in 1960 to 500 eggs in 2019. To improve and support laying persistency, nutrition is crucial to support the hen and provide the correct nutrients for egg formation. Several organs are involved in this ...
Chicken white egg chemerin as a tool for genetic selection for egg weight and hen fertility
Published in Frontiers in Physiology
Embryo mortality rate, which can reach up to 40% in avian species, is a major issue for breeding. It is therefore important to identify new embryo development biomarkers for genetic selection to improve reproductive performances. We have recently shown that chemerin is expressed in the oviductal hen magnum, accumulates in egg white, is correlated w...
Welfare issues and potential solutions for laying hens in free range and organic production systems: A review based on l...
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Published in Frontiers in Veterinary Science
In free-range and organic production systems, hens can make choices according to their needs and desires, which is in accordance with welfare definitions. Nonetheless, health and behavioral problems are also encountered in these systems. The aim of this article was to identify welfare challenges observed in these production systems in the EU and th...
Effect of Dietary Carotenoid on Egg Yolk Color and Singlet Oxygen Quenching Activity of Laying Hens
Published in The Journal of Poultry Science
The effects of dietary carotenoids on egg yolk were investigated in this study. Forty Rhode Island Red (RR) and 40 Silky Fowl (SF) hens that were 60 weeks old were used. Hens of each breed were randomly divided into four dietary groups. One group was fed a basal diet (crude protein 17%, metabolizable energy 2800 kcal/kg) only, whereas the other gro...
Research Note: Effect of egg storage length on spread of hatch window, chick quality, and organ development in Transylva...
Published in Poultry science
Two hundred and twenty eggs from Transylvanian naked neck (TNN) chickens aged 30 wk were used to determine the effect of storage length on hatch window, chick quality, and organ development. Forty-four eggs (11 eggs in 4 replicates) were stored in cold room (16±1.5°C) in batches for 0, 3, 6, 9, and 12 d before setting in incubator. Data collected w...
