Results 261 to 270 of about 87,548 (299)

Copper Deficiency in the Laying Hen

The Journal of Nutrition, 1978
Copper deficiency in the laying hen resulted in anemia and the production of eggs which were abnormal in size and shape. Many of the eggs had shells which were wrinkled and rough in texture. There was also an increase in the number of shell-less eggs.
S, Baumgartner, D J, Brown, E, Salevsky, R M, Leach   +3 more
openaire   +2 more sources

Calcium Logistics in the Laying Hen

The Journal of Nutrition, 1987
The hourly changes in the Ca2+ content of various physiological compartments in relation to shell formation has been calculated for the domestic hen throughout a 4-d ovulatory sequence. These calculations consider the circadian rhythm in Ca2+ intake when the hen is fed a complete feed or a diet containing oyster shell, the effect of the stage of the ...
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Cannibalism in laying hens

Veterinary Record, 1992
P E, Curtis, N W, Marsh
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The laying hen and bone fractures

Veterinary Record, 2011
THE laying hen has undergone considerable artificial selection pressure over the past century, to increase its egg output in order to provide a protein-rich food source for humans. While its wild counterpart will lay just five to six eggs per breeding season, modern breeds will lay in excess of 300 eggs per year (Lever 2011). With increased egg output,
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Vitamin e hypervitaminosis in laying hens

Archiv für Tierernaehrung, 1999
The aim of this investigation was to contribute to the problem of overdosing vitamin E. A total of 80 laying hens, divided into 5 groups, were fed diets supplemented with 0, 100, 1000, 10,000 and 20,000 mg/kg vitamin E over a period of 20 weeks within two brooding tests. Laying performance and hatching parameters were registered.
A, Sünder, I, Halle, G, Flachowsky
openaire   +2 more sources

Play in Laying Hens

Dataset for the manuscript 'Fowl play: Do age and aviary design affect play in cage-free laying hens?' Authors: Xiaowen Ma (马晓文), Vrinda Ambike, Valentina Bongiorno, Jacquelyn A. Jacobs, Janice C. Swanson, Tina M. Widowski, Janice M. Siegford The project examined play behavior in cage-free laying hens focusing on effects of age (17-32 weeks of age ...
Ma, Xiaowen, Siegford, Janice
openaire   +1 more source

Corticosteroids in Laying Hens

1980
In the literature adrenal hormones have often been related to stress and sometimes equalised as stress hormones.
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Tetrachlorvinphos metabolism in laying hens

Journal of Agricultural and Food Chemistry, 1981
M H, Akhtar, T S, Foster
openaire   +2 more sources

Dietary supplementation of porcine bile acids improves laying performance, serum lipid metabolism and cecal microbiota in late-phase laying hens

Animal Nutrition, 2022
Bowen Yang, Guoxian Zhao, Qiugang
exaly  

Comfrey polysaccharides modulate the gut microbiota and its metabolites SCFAs and affect the production performance of laying hens

International Journal of Biological Macromolecules, 2022
Jiangchao Zhao, Hong Mei Shang
exaly