Shell gland RNA-seq reveals key genes regulating eggshell quality and potential links between eggshell quality and hatchability across different laying stages [PDF]
Poultry ScienceThe quality of hatching eggs and their hatchability are key factors affecting the production efficiency of breeding flocks. The quality of hatching eggs is commonly graded directly based on the eggshell quality.
Chenxi Zhang +11 more
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Effect of Uniformity of Eggshell Thickness on Eggshell Quality in Chickens
The Journal of Poultry Science, 2014 Numerous parameters have been proposed to evaluate eggshell quality in order to reduce losses from damaged eggshells. The uniformity of eggshell thickness (UET), as a newly proposed parameter, is defined as the reciprocal of the coefficient of variation
Yi-Yuan Yan +5 more
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Relationship between eggshell thickness and other eggshell measurements in eggs from litter and cages [PDF]
Italian Journal of Animal Science, 2018 The objective of the present study was to determine the relationship between eggshell thickness and other eggshell characteristics in eggs produced in litter housing system and enriched cages.
Mohamed Ketta, Eva Tůmová
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The Effect of Eggshell Thickness on the Hatchability of Guinea Fowl and Pheasants [PDF]
Brazilian Journal of Poultry Science, 2016 Successful incubation affects the number of healthy chicks in all poultry species. This study examined the effect of eggshell thickness on the hatching rates of guinea fowl and pheasant eggs. In total, 964 guinea fowl and 1,728 pheasant eggs were used in
US Yamak +4 more
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Comparison of different eggshell thickness measurement methods
TURKISH JOURNAL OF VETERINARY AND ANIMAL SCIENCES, 2020 This study was conducted to examine how various methods affect the results of eggshell thickness measurements.Direct and indirect measurements were performed on 700 table eggs which were daily collected from the same flock. The shell thickness of the eggs was calculated according to a logarithm which uses egg weight.
Abdulkadir ARSLAN, Umut Sami YAMAK
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The effect of developmental stage on eggshell thickness variation in endangered falcons [PDF]
Zoology, 2010 We compared eggshell thickness of hatched eggs with that of non-developed eggs in endangered falcon taxa to explore the effect of embryo development on eggshell thinning. To our knowledge, this has never been examined before in falcons, despite the fact that eggshell thinning due to pollutants and environmental contamination is often considered the ...
Castilla, Aurora M. +4 more
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Variation in Bird Eggs-Does Female Factor, Season, and Laying Order Impact the Egg Size, Pigmentation, and Eggshell Thickness of the Eggs of Capercaillie? [PDF]
Animals (Basel), 2021 Rosenbeger J +3 more
europepmc +3 more sources
Ultrasonic eggshell thickness measurement for selection of layers
Poultry Science, 2015 This study aimed to develop a methodology for using ultrasonic technology (USG) to record eggshell thickness for selection of layers. Genetic correlations between eggshell strength and its thickness have been reported to be around 0.8, making shell thickness a selection index candidate element.
Lucyna, Kibala +4 more
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Disequilibrium feeding pattern more consistent with egg-laying physiology improves eggshell quality of laying hens during late laying period [PDF]
Animal NutritionDisequilibrium feeding pattern, as a new feeding technique, more suitable for egg-laying physiology, was feeding two-thirds diet to hens after 14:00 every day without modifying diet nutrient levels and changing daily feed rationing, to better meet ...
Yan Hu +5 more
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Impact of cuticle quality and eggshell thickness on egg antibacterial efficiency
Poultry Science, 2019 The cuticle is the first barrier against bacterial trans-shell penetration. To evaluate the cuticle quality among different colored eggshells, an efficient and reliable method is proposed in this paper on the basis of the opacity theory. It is shown that the Spearman's rank correlation coefficients between the proposed opacity method and the reported ...
Xia Chen +7 more
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