Results 41 to 50 of about 108,757 (282)

Implications for welfare, productivity and sustainability of the variation in reported levels of mortality for laying hen flocks kept in different housing systems: A meta-analysis of ten studies [PDF]

, 2016
Data from ten sources comprising 3,851 flocks were modelled to identify variation in levels of mortality in laying hens. The predicted increase with age was curvilinear with significant variation between the seven breed categories. Mortality was higher
Lambton, Sarah L., Weeks, Clare A., Williams, Adrian G.   +2 more
core   +5 more sources

Effect of housing arrangement on fecal-oral transmission of avian hepatitis E virus in chicken flocks

BMC Veterinary Research, 2017
Background Avian hepatitis E virus (HEV) infection is common in chicken flocks in China, as currently no measures exist to prevent the spread of the disease.
Baoyuan Liu, Yani Sun, Yiyang Chen, Taofeng Du, Yuchen Nan, Xinjie Wang, Huixia Li, Baicheng Huang, Gaiping Zhang, En-Min Zhou, Qin Zhao   +10 more
doaj   +1 more source

Seasonal variations in egg quality traits in Belgrade supermarkets [PDF]

Biotechnology in Animal Husbandry
The aim of this study was to determine the quality of eggs available in Belgrade supermarkets during different seasons (winter, spring, summer), for various housing systems (cage, floor, and free-range), and to assess the representation of eggs from cage
Tolimir Nataša, Maslovarić Marijana, Urbancl Stefana, Nedeljković-Trailović Jelena, Pezo Lato, Lukić Miloš, Čanak Stevan, Škrbić Zdenka   +7 more
doaj   +1 more source

Emissions of ammonia, carbon dioxide and particulate matter from cage-free layer houses in California [PDF]

Atmospheric Environment, 2017
Abstract Cage-free housing systems have attracted considerable attention in the United States recently as they provide more space and other resources (such as litter area, perches, and nest boxes) for hens and are considered to be more favorable from the standpoint of hen welfare. This study was carried out to quantify emissions of aerial ammonia (NH
Xingjun Lin, Ruihong Zhang, Shumei Jiang, Hamed El-Mashad, Hongwei Xin   +4 more
openaire   +1 more source

Characterization of the eukaryotic microbial communities in the chicken ileum in cage-free and conventional commercial housing systems

Poultry Science, 2023
The current shift from conventional cage (CC) hen housing facilities towards cage-free (CF) hen housing in the egg industry has left many questions regarding how level of fecal exposure and exposure to other hens may influence the hen intestinal microbiota.
C.J. Anderson, B.J. Altendorf, S. Schmitz-Esser, D.A. Koltes   +3 more
openaire   +4 more sources

Impact of Corporate Commitments to Source Cage-Free Eggs on Layer Hen Housing - Preregistration

, 2020
Over the last decade, hundreds of companies around the world have committed to source cage-free eggs by 2025 or earlier. Commitments sometimes result from conversation with groups advocating to improve the treatment of animals, as cage-free housing is widely believed to provide better welfare for egg-laying hens.
Samara Mendez, Jacob Robert Peacock, Matt Butner   +2 more
openaire   +3 more sources

Use of location tracking to link egg production with toe pecking injuries, feather quality, body mass in laying hens

Journal of Applied Poultry Research
Summary: The current study sought to validate a proxy for egg laying that could be used within cage-free housing systems towards breeding programs of laying hens.
M.J. Toscano, M. Neuditschko, S.G. Gebhardt-Henrich   +2 more
doaj   +1 more source

Genetic Improvement of Livestock for Organic Farming Systems [PDF]

, 2003
Organic farming which experienced a constant rise over the last two decades is a system based on sustainability and on a concept tending towards functional integrity.
Boelling, D., Groen, A.F., Jensen, J., Madsen, P., Sørensen, P.   +4 more
core   +3 more sources

Assessing environmental control strategies in cage-free aviary housing systems: Egg production analysis and Random Forest modeling

Computers and Electronics in Agriculture, 2022
Since 1990, worldwide egg production has increased on average 2.8% per year. This increase has drawn the attention of animal welfare advocates. In Canada, new challenges have emerged, among them: increased awareness in animal welfare and environmental footprint and a shift to cage-free egg production systems (CFSs).
Gonzalez-Mora, Andrés F., Rousseau, Alain N., Larios, Araceli Dalila, Godbout, Stéphane, Fournel, Sébastien   +4 more
openaire   +2 more sources

Effect of housing system and age of laying hens on eggshell quality, microbial contamination, and penetration of microorganisms into eggs

Czech Journal of Animal Science, 2018
Hens of the laying hybrid ISA Brown were used in the study with the objective to evaluate eggshell quality, microbial contamination of eggshells, and penetration of microorganisms into the egg content in different housing systems (enriched cage: 60 hens,
Jana Vlčková, Eva Tůmová, Mohamed Ketta, Michaela Englmaierová, Darina Chodová   +4 more
doaj   +1 more source