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Bayesian inference of genetic parameters for reproductive and performance traits in White Leghorn hens
egg production fertility genetic correlation hatchability heritability
2018/11/23
This study estimated the genetic parameters for reproductive and performance traits and determined which ones can be used as selection criteria for egg production in laying hens using the Bayesian inf...
Negative effect of phytase superdosing in laying hens
Hisex dietary calcium OptiPhos® performance
2018/11/23
Hisex hens, aged 24 weeks, were divided into 6 groups. Each group consisted of 4 cages with 10 hens per cage with dimensions and equipment meeting the EU directives. This 2 × 3 factorial experiment in...
Effect of Housing System and Age of Laying Hens on Eggshell Quality, Microbial Contamination, and Penetration of Microorganisms into Eggs
antimicrobial effect gastrointestinal tract pathogens palm oil lauric acid capric acid
2018/3/5
Increasing antibiotic resistance has led to a ban on antibiotic use in feed additives in the EU. Therefore, new
non-antibiotic, pathogen-inhibiting agents are urgently needed. Inhibitory effects of e...
Effect of Suboptimal Levels of Non-Phytate Phosphorus and Exogenous Phytase on Precaecal Digestibility of Phosphorus and Calcium in Laying Hens
layers ileum calcium and phosphorus absorption
2018/3/5
Musilova A., Lichovnikova M., Kupcikova L., Anderle V. (2017): Effect of suboptimal levels of non-phytate
phosphorus and exogenous phytase on precaecal digestibility of phosphorus and calcium in layi...
Differences in Oviposition and Egg Quality of Various Genotypes of Laying Hens
layers genotype sequence time of collection egg quality
2018/3/5
The differences in egg production traits in six laying hen genotypes (brown-egg hens Bovans Brown, Bovans
Sperwer, ISA Sussex; white-egg hen Dekalb White; laying hens with tinted shells Moravia Barre...
Effects of lupin seed supplementation on egg production performance,and qualitative egg traits in laying hens
Lupinus angustifolius L. laying performance egg quality yolk colour
2016/12/8
We investigated the effects of lupin (Lupinus angustifolius L.) seed supplementation on egg production performance and egg quality in laying hens. A total of 120 Hy-Line Brown laying hens (29-week old...
Effect of dietary magnesium,calcium,phosphorus,and limestone grain size on productive performance and eggshell quality of hens
magnesium oxide limestone granularity mixed feed Ca : NPP ratio egg shell strength layers
2016/11/11
Two experiments conducted on laying hens, aged 50 and 52 weeks, were carried out to evaluate the effect of dietary Mg and its relationship to the Ca : NPP (non-phytate phosphorus) ratio using a variou...
Levels of fatty acids in the whole body of hens and cocks of the Cobb 500 and Ross 308 hybrid combinations at the end of the fattening period
saturated fatty acids monounsaturated fatty acids polyunsaturated fatty acids n-6 n-3
2016/9/1
In this study, we determined the levels of individual fatty acids in the whole chicken body, as well as dry matter, nitrogenic substances and fat in Cobb 500 and Ross 308 chickens after 40 days of fat...
Eggshell structure,measurements,and quality-affecting factors in laying hens:a review
eggshell composition eggshell quality oviposition time genotype housing system
2016/8/1
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 ...
Differences in Physicochemical and Nutritional Properties of Breast and Thigh Meat from Crossbred Chickens, Commercial Broilers, and Spent Hens
Crossbred Chicken Commercial Broiler Spent Hen Physicochemical Properties
2016/7/27
The objective of this study was to compare the physicochemical and nutritional properties of breast and thigh meat from commercial Chinese crossbred chickens (817 Crossbred chicken, 817C), imported co...
Effects of Octacosanol Extracted from Rice Bran on the Laying Performance, Egg Quality and Blood Metabolites of Laying Hens
Octacosanol Laying Performance Egg Quality Blood Metabolites Laying Hens
2016/11/10
A 42-d study with 384 Hy-line brown laying hens was conducted to assess the effects of dietary octacosanol supplementation on laying performance, egg quality and blood metabolites of laying hens. Hens...
Effects of Dietary Calcium Levels on Productive Performance, Eggshell Quality and Overall Calcium Status in Aged Laying Hens
Dietary Calcium Levels Cracked Eggs Eggshell Strength Tibial Breaking Strength
2016/11/10
This study was conducted to investigate the effects of diets with varying levels of calcium on egg production, shell quality and overall calcium status in aged laying hens. A total of five hundred 70-...
Effects of a low-phosphorus diet and exogenous phytase on performance,egg quality,and bacterial colonisation and digestibility of minerals in the digestive tract of laying hens
layers eggshell microbial 3-phytase ileum caecum Lactobacillus spp
2015/12/17
The objective of the experiment was to determine the effects of different levels of phytase (0, 150, 250, and 350 phytase units (FTU)/kg; F) produced by Aspergillus niger in the diets of hens fed decr...
Effects of dietary gamma-aminobutyric acid on egg production, egg quality, and blood profiles in layer hens
gamma-aminobutyric acid egg production egg quality
2015/11/26
Hy-line brown commercial layers (32 weeks old) were used to investigate the effects of GABA
(gamma-aminobutyric acid) derived from E. coli strains on productivity, egg quality, and blood profile. In...
Novel Polymorphisms of Adrenergic, Alpha-1B-, Receptor and Peroxisome Proliferator-activated Receptor Gamma, Coactivator 1 Beta Genes and Their Association with Egg Production Traits in Local Chinese Dagu Hens
Polymorphisms ADRA1B PPARGC1B Chinese Dagu Hens Egg Production Traits
2016/11/10
Adrenergic, alpha-1B-, receptor (ADRA1B) and peroxisome proliferator-activated receptor gamma, coactivator 1 beta (PPARGC1B) genes are involved in regulation of hen ovarian development. In this study,...