Results 31 to 40 of about 887,351 (211)

Effect of 25-hydroxyvitamin D and essential oil complex on productive performance, egg quality, and uterus antioxidant capacity of laying hens

Poultry Science, 2021
: This study was conducted to determine the effect of 25-hydroxyvitamin D (HDV) and essential oils (EO) on the uterus antioxidant capacity, egg quality, and eggshell ultrastructure in laying hens.
Pinyao Zhao, Lei Yan, Tao Zhang, Huadong Yin, Jingbo Liu, Jianping Wang   +5 more
doaj   +1 more source

Determination of hen eggshell stress by the puncture method [PDF]

Journal on Processing and Energy in Agriculture, 2021
The aim of this study was to design and apply the measuring acquisition system, or a device for determining the limit values of eggshell stress using the puncture method.
Koprivica Ranko, Veljković Biljana, Rakonjac Simeon, Božić Miloš, Vujičić Vojislav, Radivojević Dušan, Marković Dušan, Đokić Dragoslav   +7 more
doaj   +1 more source

Eggshell structure, measurements, and quality-affecting factors in laying hens: a review

Czech Journal of Animal Science, 2016
Eggshell quality is one of the most significant factors affecting poultry industry; it economically influences egg production and hatchability. Eggshell consists of shell membranes and the true shell that includes mammillary layer, palisade layer, and ...
M. Ketta, E. Tůmová
doaj   +1 more source

Research Note: Changes in eggshell quality and microstructure related to hen age during a production cycle

Poultry Science, 2021
: We have studied in detail the changes that occur in eggshell structure and composition during a production cycle in order to better understand the deterioration of eggshell quality with hen age (at 33, 45, and 67 wk).
Cristina Benavides-Reyes, Elisa Folegatti, Nazaret Dominguez-Gasca, Gilberto Litta, Estefania Sanchez-Rodriguez, Alejandro B. Rodriguez-Navarro, Murtala Umar Faruk   +6 more
doaj   +1 more source

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
openaire   +1 more source

Eggshell thickness and egg morphometrics in five songbird species from the Central Valley, California

Journal of Field Ornithology
Avian eggshell thickness is an important life history metric in birds and has broad applications across disciplines ranging from animal behavior to toxicology.
Carley R. Schacter, Sarah H. Peterson, C. Alex Hartman, Mark P. Herzog, Joshua T. Ackerman   +4 more
doaj   +1 more source

Eggshell thickness, pore density, pore diameter, cuticle opacity, and cuticle layer thickness in ten bird species.

, 2019
Eggshell thickness, pore density, pore diameter, cuticle opacity, and cuticle layer thickness in ten bird species.
Zhuocheng Hou (1916329), Guiyun Xu (192935), Xia Chen (299366), Xingzheng Li (7037351), Zhaoxiang He (7037354), Jiangxia Zheng (192932), Ning Yang (114965)   +6 more
core   +1 more source

The partial replacement of sodium chloride with sodium bicarbonate or sodium sulfate in laying hen diets improved laying performance, and eggshell quality and ultrastructure

Poultry Science, 2021
: This study investigated the effects of dietary chloride (Cl) reduction on laying performance and eggshell quality by substitution of sodium bicarbonate (NaHCO3) or sodium sulfate (Na2SO4) for part of dietary sodium chloride (NaCl), and further explored
Yu Fu, Jing Wang, Hai-jun Zhang, Shu-geng Wu, Jian-min Zhou, Guang-hai Qi   +5 more
doaj   +1 more source

Eggshell appearance does not signal maternal corticosterone exposure in Japanese quail: an experimental study with brown-spotted eggs [PDF]

, 2013
Reproduction is a critical period for birds as they have to cope with many stressful events. One consequence of an acute exposure to stress is the release of corticosterone, the avian stress hormone.
Ivan Mikšík (492331), Spencer, Karen A., Duval Camille, Miksik, Ivan, Mikšík Ivan, Paul G Lovell, Duval, C., Lovell, P., Karen A Spencer, Paul G. Lovell (492330), Reynolds, S., Spencer Karen A., Reynolds S. James, Karen A. Spencer (492333), Phillip Cassey, Camille Duval (360534), Spencer, K., Phillip Cassey (244230), S. James Reynolds (492332), Camille Duval, Miksik, I., S James Reynolds, Lovell Paul G., Cassey, Phillip, Reynolds, S. James, Cassey, P., Duval, Camille, Lovell, Paul G., Ivan Mikšík, Lovell, P. George; id_orcid, Cassey Phillip, Spencer, Karen A.; id_orcid   +31 more
core   +1 more source

Shell gland RNA-seq reveals key genes regulating eggshell quality and potential links between eggshell quality and hatchability across different laying stages

Poultry Science
The 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, Ranran Cao, Siqin Wei, Shu Wang, Zhao Cai, Junlai Shi, Yanru Lei, Kejun Wang, Yadong Tian, Guirong Sun, Xiangtao Kang, Wenting Li   +11 more
doaj   +1 more source