scholarly journals Genetic and Phenotypic Correlations Between Feather Pecking Behavior, Stress Response, Immune Response, and Egg Quality Traits in Laying Hens

2004 ◽  
Vol 83 (7) ◽  
pp. 1077-1082 ◽  
Author(s):  
A.J. Buitenhuis ◽  
T.B. Rodenburg ◽  
P.H. Wissink ◽  
J. Visscher ◽  
P. Koene ◽  
...  
Keyword(s):  
Immune Response ◽  
Stress Response ◽  
Laying Hens ◽  
Egg Quality ◽  
Quality Traits ◽  
Feather Pecking ◽  
Phenotypic Correlations ◽  
Genetic And Phenotypic Correlations

Heritability, genetic and phenotypic correlations of egg quality traits in Iranian native fowl

2010 ◽  
Vol 51 (6) ◽  
pp. 740-744 ◽  
Author(s):  
H. Emamgholi Begli ◽  
S. Zerehdaran ◽  
S. Hassani ◽  
M.A. Abbasi ◽  
A.R. Khan Ahmadi
Keyword(s):  
Egg Quality ◽  
Quality Traits ◽  
Phenotypic Correlations ◽  
Genetic And Phenotypic Correlations

Genetic and Phenotypic Correlations Between Feather Pecking and Open-Field Response in Laying Hens at Two Different Ages

2004 ◽  
Vol 34 (4) ◽  
pp. 407-415 ◽  
Author(s):  
T. B. Rodenburg ◽  
A. J. Buitenhuis ◽  
B. Ask ◽  
K. A. Uitdehaag ◽  
P. Koene ◽  
...  
Keyword(s):  
Open Field ◽  
Laying Hens ◽  
Feather Pecking ◽  
Phenotypic Correlations ◽  
Field Response ◽  
Different Ages ◽  
Genetic And Phenotypic Correlations

scholarly journals Heritabilities and genetic and phenotypic correlations of egg quality traits in brown-egg dwarf layers

2005 ◽  
Vol 84 (8) ◽  
pp. 1209-1213 ◽  
Author(s):  
L.-C. Zhang ◽  
Z.-H. Ning ◽  
G.-Y. Xu ◽  
Z.-C. Hou ◽  
N. Yang
Keyword(s):  
Egg Quality ◽  
Quality Traits ◽  
Phenotypic Correlations ◽  
Genetic And Phenotypic Correlations

scholarly journals Influence of the energy and digestible lysine contents of the diet on performance and egg quality traits of brown-egg laying hens from 19 to 59 weeks of age

2021 ◽  
pp. 101211
Author(s):  
R. Scappaticcio ◽  
J. Garcia ◽  
G. Fondevila ◽  
A.F. de Juan ◽  
L. Cámara ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Egg Laying ◽  
Quality Traits

scholarly journals The effects of space allowance on egg yield, egg quality and plumage condition of laying hens in battery cages

2008 ◽  
Vol 53 (No. 8) ◽  
pp. 345-353 ◽  
Author(s):  
M. Sarica ◽  
S. Boga ◽  
U.S. Yamak
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Stocking Density ◽  
Experimental Period ◽  
Egg Mass ◽  
Quality Traits ◽  
Body Parts ◽  
Battery Cages ◽  
And Performance

This study was conducted to investigate the effects of cage stocking density on egg yield, some egg quality traits and plumage condition in laying hens. Eighteen weeks-old 264 ISA-Brown pullets were divided into four cage density groups. The densities were 2 000, 1 000, 667 and 500 cm<sup>2</sup> per hen (by allocating 1, 2, 3 and 4 hens per cage; floor area 40 × 50 cm) with 48, 30, 24 and 21 replicate cages, totally 123 three-tier battery cages. During the experimental period from 18 to 53 weeks of age, all birds were provided illumination for 16 hours a day. The hens were fed a diet containing 11.7 MJ ME/kg and 180 g CP during the period of 18 to 40 weeks of age and 11.3 MJ ME/kg and 170 g CP during the period of 41 to 54 weeks of age. Feed and water were available for <I>ad libitum</I>. Egg yield, mortality, live weights at 50% egg production age and at the end of experiment, pecking related mortalities, some egg quality traits and plumage condition were recorded weekly. Hen-housed egg production, egg mass, viability, and live weights were significantly decreased by higher densities. Most of the egg quality traits were not affected by cage densities. Pecking related mortalities increased in cage densities of 667 cm<sup>2</sup> and 500 cm<sup>2</sup> per hen compared to the other densities (<I>P</I> < 0.05) while plumage scores were higher in all body parts of hens kept in cages of 2 000 cm<sup>2</sup> and 1 000 cm<sup>2</sup> densities compared to the higher densities. The results showed that brown laying hens should be kept in cages having 1 000–2 000 cm<sup>2</sup> densities in order to improve their welfare and performance.

Providing laying hens in group-housed enriched cages with access to barley silage reduces aggressive and feather-pecking behaviour

2016 ◽  
Vol 96 (2) ◽  
pp. 161-171 ◽  
Author(s):  
S.G. Johannson ◽  
C. Raginski ◽  
K. Schwean-Lardner ◽  
H.L. Classen
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Free Access ◽  
Feather Pecking ◽  
Nest Boxes ◽  
And Performance ◽  
Barley Silage ◽  
Effect Of Feeding ◽  
Bird Weight

Two trials were conducted to study the effect of feeding barley silage on the behaviour and performance of beak-trimmed laying hens. In each trial, 20 hens and 2 roosters were housed in each of eight group-housed enriched cages, with four cages provided a laying hen diet and four cages additionally given free access to barley silage. Egg production and quality, and hen behaviour were assessed throughout the trials (Trial One 20–30 weeks; Trial Two 19–28 weeks). Data were analysed using Proc Mixed of SAS 9.4 and differences were significant when P ≤ 0.05. Silage-fed hens consumed 41 (13.9 g DM) and 50 (13.5 g DM) grams of silage per hen per day in Trials One and Two, respectively, while consuming less layer diet. Birds fed silage spent less time expressing aggressive and feather-pecking behaviours and in nest boxes, and more time feeding than control birds. Egg production, egg quality, and bird weight were not affected by treatment; yolk colour was darker for the silage treatment. Feathering quality was improved in silage-fed birds compared to control birds. It was concluded that providing hens with access to barley silage can improve welfare indicators without negatively affecting the egg production and egg quality.

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