scholarly journals Welfare assessment of two hybrids of laying hens housed in conventional cages

2008 ◽  
Vol 18 (1) ◽  
pp. 128-134
Author(s):  
H.D.H. Mahboub ◽  
I.M. Fares ◽  
R.A. Darwish
Keyword(s):  
Laying Hens ◽  
Welfare Assessment

scholarly journals Qualitative behaviour assessment as part of a welfare assessment in flocks of laying hens

2021 ◽  
pp. 105535
Author(s):  
Guro Vasdal ◽  
Karianne Muri ◽  
Solveig Marie Stubsjøen ◽  
Randi Oppermann Moe ◽  
Kathe Kittelsen
Keyword(s):  
Laying Hens ◽  
Qualitative Behaviour ◽  
Welfare Assessment

scholarly journals Developing a novel welfare assessment tool for loose-housed laying hens – the Aviary Transect method

2021 ◽  
pp. 101533
Author(s):  
Guro Vasdal ◽  
Joanna Marchewka ◽  
Ruth C. Newberry ◽  
Inma Estevez ◽  
Kathe Kittelsen
Keyword(s):  
Assessment Tool ◽  
Laying Hens ◽  
Welfare Assessment

scholarly journals A computer model for welfare assessment of poultry production systems for laying hens

2006 ◽  
Vol 54 (2) ◽  
pp. 157-168 ◽  
Author(s):  
R.M. De Mol ◽  
W.G.P. Schouten ◽  
E. Evers ◽  
H. Drost ◽  
H.W.J. Houwers ◽  
...  
Keyword(s):  
Computer Model ◽  
Laying Hens ◽  
Production Systems ◽  
Poultry Production ◽  
Welfare Assessment

Overall welfare assessment of laying hens: Comparing science-based, environment-based and animal-based assessments

2011 ◽  
Vol 82 (1) ◽  
pp. 150-160 ◽  
Author(s):  
Tsuyoshi SHIMMURA ◽  
Marc B. M. BRACKE ◽  
Rudi M. DE MOL ◽  
Satoshi HIRAHARA ◽  
Katsuji UETAKE ◽  
...  
Keyword(s):  
Laying Hens ◽  
Welfare Assessment

Aggregating Welfare Indicators into an Operational Welfare Assessment System: A Bottom-up Approach

2001 ◽  
Vol 51 (2) ◽  
pp. 53-57 ◽  
Author(s):  
Tine Rousing ◽  
Marianne Bonde ◽  
Jan Tind Sørensen
Keyword(s):  
Assessment System ◽  
Bottom Up ◽  
Welfare Assessment ◽  
Welfare Indicators ◽  
System A

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

ПРЕРЫВИСТОЕ ОСВЕЩЕНИЕ ПОВЫШАЕТ ЭФФЕКТИВНОСТЬ ИСКУССТВЕННОГО ОСЕМЕНЕНИЯ КУР В КЛЕТКАХ

2019 ◽  
Keyword(s):  
Reproductive Performance ◽  
Artificial Insemination ◽  
Egg Production ◽  
Laying Hens ◽  
Electric Energy ◽  
Productive Performance ◽  
Feed Conversion ◽  
Scientific Center ◽  
Academy Of Sciences ◽  
Egg Fertility

Intermittent Lighting Improves the Efficiency of Artificial Insemination in Cage Housed Laying Hens Kavtarashvili A.Sh., Kolokolnikova T.N. Federal Scientific Center “All-Russian Research and Technological Poultry Institute” of Russian Academy of Sciences Omsk Agrarian Scientific Center Summary: The effects of different lighting regimes on the oviposition schedule, productive performance, and reproductive efficiency in cage housed laying hens of layer parental flock (Hisex White-R) were studied; the reasonable regime of artificial insemination (AI) under intermittent lighting is proposed. It was found that intermittent lighting regime 1L:4D:4L:1D:4L:10D compared to the constant lighting significantly alters oviposition schedule: under this regime 82.3% of all daily eggs were laid until 9 am (vs. 66.6% in control). This regime and AI at 10 am improved the productive and reproductive performance compared to control (constant lighting 16L:8D and AI at 12 am): mortality by 1.9%, egg production per initial hen by 3.8%, egg weight by 1.1%, percentage of eggs suitable for incubation by 1.9%, egg fertility by 0.9%, hatchability by 2.3%, hatch of chicks by 2.9%, feed conversion ratio (kg of feed per 10 eggs) by 5.3%, the expenses of electric energy for lighting (per 1000 eggs suitable for incubation) by 54.5%. Key words: INTERMITTENT LIGHTING, CAGE HOUSED LAYERS, ARTIFICIAL INSEMINATION (AI), OVIPOSITION SCHEDULE, AI TIMING, PRODUCTIVE PERFORMANCE, REPRODUCTIVE PERFORMANCE

RADIOIMMUNOASSAY OF OESTRONE AND OESTRADIOL IN THE PERIPHERAL PLASMA OF THE DOMESTIC FOWL IN VARIOUS PHYSIOLOGICAL STATES AND OF HYPOPHYSECTOMIZED AND OVARIECTOMIZED FOWLS

1974 ◽  
Vol 75 (1) ◽  
pp. 133-140 ◽  
Author(s):  
B. E. Senior
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Diethyl Ether ◽  
Bovine Serum ◽  
Domestic Fowl ◽  
Laying Hens ◽  
Peripheral Plasma ◽  
The Mean ◽  
Precision And Accuracy ◽  
Chicken Ovary

ABSTRACT A radioimmunoassay was developed to measure the levels of oestrone and oestradiol in 0.5–1.0 ml of domestic fowl peripheral plasma. The oestrogens were extracted with diethyl ether, chromatographed on columns of Sephadex LH-20 and assayed with an antiserum prepared against oestradiol-17β-succinyl-bovine serum albumin using a 17 h incubation at 4°C. The specificity, sensitivity, precision and accuracy of the assays were satisfactory. Oestrogen concentrations were determined in the plasma of birds in various reproductive states. In laying hens the ranges of oestrone and oestradiol were 12–190 pg/ml and 29–327 pg/ml respectively. Levels in immature birds, in adult cockerels and in an ovariectomized hen were barely detectable. The mean concentrations of oestrone and oestradiol in the plasma of four non-laying hens (55 pg/ml and 72 pg/ml respectively) and one partially ovariectomized hen (71 pg/ml and 134 pg/ml respectively) were well within the range for laying hens. It is evident that the large, yolk-filled follicles are not the only source of oestrogens in the chicken ovary.

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