scholarly journals Oviposition time, flock age, and egg position in clutch in relation to brown eggshell color in laying hens

2016 ◽  
Vol 95 (9) ◽  
pp. 2052-2057 ◽  
Author(s):  
S. Samiullah ◽  
J. Roberts ◽  
K. Chousalkar
Keyword(s):  
Laying Hens ◽  
Eggshell Color

scholarly journals The Effect of the Type of Alternative Housing System, Genotype and Age of Laying Hens on Egg Quality

2018 ◽  
Vol 18 (2) ◽  
pp. 541-556 ◽  
Author(s):  
Zofia Sokołowicz ◽  
Józefa Krawczyk ◽  
Magdalena Dykiel
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Housing System ◽  
Color Intensity ◽  
Egg Weight ◽  
Blood Spots ◽  
Alternative Housing ◽  
Housing Systems ◽  
System Type ◽  
Eggshell Color

Abstract The present study investigated the effect of the type of alternative housing system, and genotype and age of laying hens on physical traits of egg shell and contents. It was demonstrated that alternative housing system type influenced egg weight and shape, and eggshell color and yolk color intensity. Eggs from free-range system were heavier and were characterized by more intense yolk color. No effect of alternative housing system type on albumen height, value of Haugh units (HU value) and presence of meat and blood spots was noted. Hen genotype had a significant effect on egg weight and eggshell color intensity in each of the alternative housing systems tested in this study. Hy-line Brown hens laid heavier eggs than hens of native breeds. Genotype was also observed to affect egg content traits (albumen height, HU values and presence of meat and blood spots). Independently of the type of alternative housing system, most blood and meat spots were noted in eggs of hens laying brown-shelled eggs, i.e. R-11 and Hy-line Brown layers. Laying hen age significantly impacted on egg weight, yolk percentage, eggshell traits (color intensity, weight, thickness and strength) and egg content traits (HU value, yolk weight and color intensity, presence of meat and blood spots). Older hens laid heavier eggs with a greater yolk percentage but with thinner eggshell.

scholarly journals PSIV-3 Late-Breaking: Transcriptomic analysis in the liver of aged brown-egg laying hens with different intensity of eggshell color.

2018 ◽  
Vol 96 (suppl_3) ◽  
pp. 286-286
Author(s):  
G Han ◽  
D Kil ◽  
D Goo ◽  
G Park ◽  
J Kim ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Laying ◽  
Transcriptomic Analysis ◽  
Eggshell Color

scholarly journals Eggshell color in brown-egg laying hens — a review

2015 ◽  
Vol 94 (10) ◽  
pp. 2566-2575 ◽  
Author(s):  
S. Samiullah ◽  
J.R. Roberts ◽  
K. Chousalkar
Keyword(s):  
Laying Hens ◽  
Egg Laying ◽  
Eggshell Color

Effect of Vitamin D3 on Cadmium Retention by Laying Hens

2002 ◽  
Vol 52 (2) ◽  
pp. 81-84
Author(s):  
B. Koréneková ◽  
A. Jacková ◽  
J. Kottferová ◽  
P. Siklenka ◽  
M. Skalická ◽  
...  
Keyword(s):  
Vitamin D ◽  
Laying Hens
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