scholarly journals Floor Space Studies Using Slat Floor and Litter Floor for Laying Hens

1962 ◽  
Vol 41 (5) ◽  
pp. 1394-1400 ◽  
Author(s):  
Q.B. Kinder ◽  
A.B. Stephenson
Keyword(s):  
Laying Hens ◽  
Floor Space ◽  
Slat Floor

Behavioural responses to different floor space allowances in small groups of laying hens

2006 ◽  
Vol 47 (2) ◽  
pp. 120-124 ◽  
Author(s):  
C.J. Savory ◽  
M.C. Jack ◽  
V. Sandilands
Keyword(s):  
Small Groups ◽  
Laying Hens ◽  
Behavioural Responses ◽  
Floor Space

Floor space allowances for laying hens

1983 ◽  
Vol 113 (1) ◽  
pp. 23-23 ◽  
Author(s):  
B. Hughes
Keyword(s):  
Laying Hens ◽  
Floor Space

scholarly journals The effects of floor space and nest box access on the physiology and behavior of caged laying hens

2019 ◽  
Vol 98 (2) ◽  
pp. 533-547 ◽  
Author(s):  
J.M. Engel ◽  
T.M. Widowski ◽  
A.J. Tilbrook ◽  
K.L. Butler ◽  
P.H. Hemsworth
Keyword(s):  
Laying Hens ◽  
Nest Box ◽  
Floor Space ◽  
And Behavior

scholarly journals Suggestions to Derive Maximum Stocking Densities for Layer Pullets

Animals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 348 ◽  
Author(s):  
E. Tobias Krause ◽  
Lars Schrader
Keyword(s):  
European Union ◽  
Broiler Chickens ◽  
Laying Hens ◽  
Stocking Density ◽  
Gallus Domesticus ◽  
Gallus Gallus Domesticus ◽  
The European Union ◽  
Floor Space ◽  
Additional Space ◽  
Key Parameter

Stocking densities for domestic chickens (Gallus gallus domesticus) are regulated by the Council Directives of the European Union for both laying hens and broiler chickens. For layer pullets no regulation of stocking density has been established yet. Based on the existing Council Directives for laying hens (1999/74/EC), broiler chickens (2007/43/EC) and calculations of the floor space that is required for the respective chicken’s body, we exemplarily calculated maximum stocking densities for layer pullets. Based on the calculations we obtained absolute additional spaces for birds of different live body mass classes, i.e., useable floor space that the birds have additionally available to the space covered by their body. This allowed us to calculate the relative additional space per individual. We suggest the relative additional space to be a key parameter to derive requirements for a maximum stocking density in layer pullets. We analysed several scenarios for pullets under consideration of the Council Directives for laying hens and for broiler chickens, coming to the conclusion that layer pullets at the end of their rearing period should be provided ideally with a relative additional space of about 40–60%.

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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