Incorporation of dietary linoleic and conjugated linoleic acids and related effects on eggs of laying hens

In mammals, (n-3) PUFA and conjugated linoleic acids (CLA) act as activators of PPARα and alter nuclear concentrations of sterol regulatory element-binding proteins (SREBP) in the liver, and thereby influence hepatic lipid catabolism and synthesis. In this study, we investigated the hypothesis that (n-3) PUFA and CLA exert similar effects in the liver of laying hens. Thirty hens (64 weeks old) were fed diets containing 30 g/kg of sunflower oil (control), fish oil (salmon oil) or CLA in TAG form (containing predominantlycis-9,trans-11 CLA andtrans-10,cis-12 CLA) for 5 weeks. Hens fed fish oil had a higher expression of some PPARα target genes and a lower nuclear concentration of SREBP-2 in the liver and lower concentrations of cholesterol and TAG in plasma than control hens. Nuclear concentration of SREBP-1 and its target genes involved in lipogenesis were not altered in hens fed fish oil. Hens fed CLA had increased concentrations of TAG and cholesterol in the liver. However, their mRNA levels of PPARα target genes and nuclear concentrations of SREBP-1 and SREBP-2 as well as mRNA levels of their target genes in the liver were largely unchanged compared to control hens. The results of this study suggest that (n-3) PUFA cause a moderate activation of PPARα and lower cholesterol synthesis but do not impair fatty acid synthesis in the liver of laying hens. CLA lead to an accumulation of TAG and cholesterol in the liver of hens by mechanisms to be elucidated in further studies.

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Effects of dietary conjugated linoleic acids on lipid metabolism and antioxidant capacity in laying hens

Archives of Animal Nutrition ◽

10.1080/1745039x.2011.617546 ◽

2011 ◽

Vol 65 (5) ◽

pp. 354-365 ◽

Cited By ~ 20

Author(s):

Xiaolong Qi ◽

Shugeng Wu ◽

Haijun Zhang ◽

Hongyuan Yue ◽

Shaohui Xu ◽

...

Keyword(s):

Lipid Metabolism ◽

Antioxidant Capacity ◽

Laying Hens ◽

Conjugated Linoleic Acids

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Effect of Vitamin D3 on Cadmium Retention by Laying Hens

CrossRef Listing of Deleted DOIs ◽

10.1080/09064700252927737 ◽

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

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IMPROVEMENT OF INDICATORS OF EGG PRODUCTION AND QUALITY OF EGGS UNDER THE INTRODUCTION OF NON-TRADITIONAL FEED SOURCES INTO THE DIET FOR LAYING HENS

PROCEEDINGS of Nizhnevolzhskiy agrouniversity complex science and higher vocational education ◽

10.32786/2071-9485-2019-03-37 ◽

2019 ◽

Vol 3 ◽

Keyword(s):

Egg Production ◽

Laying Hens

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EFFICIENCY OF WASTE USE OF OIL EXTRACTION PRODUCTION IN FEEDING BROILER CHICKENS AND LAYING HENS

PROCEEDINGS of Nizhnevolzhskiy agrouniversity complex science and higher vocational education ◽

10.32786/2071-9485-2018-04-34 ◽

2018 ◽

Keyword(s):

Broiler Chickens ◽

Laying Hens ◽

Oil Extraction

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ПРЕРЫВИСТОЕ ОСВЕЩЕНИЕ ПОВЫШАЕТ ЭФФЕКТИВНОСТЬ ИСКУССТВЕННОГО ОСЕМЕНЕНИЯ КУР В КЛЕТКАХ

10.33845/0033-3239-2019-68-7-8-51-55 ◽

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

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

Acta Endocrinologica ◽

10.1530/acta.0.0750133 ◽

1974 ◽

Vol 75 (1) ◽

pp. 133-140 ◽

Cited By ~ 9

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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NEW GENERATION FEED ADDITIVE IN POULTRY BREEDING

Vestnik of the Russian agricultural science ◽

10.30850/vrsn/2019/1/67-69 ◽

1970 ◽

pp. 67-69

Author(s):

L. I. Naumova ◽

М. Т. Klychnikov ◽

N. F. Klychnikova

Keyword(s):

Laying Hens ◽

Far East ◽

Brown Seaweed ◽

Test Group ◽

Live Weight ◽

Production Quality ◽

Feed Additive ◽

Poultry Production ◽

Omega 3 ◽

Mineral Substances

The analysis of different doses of complex feed additive to poultry ration have been made. The influence of new feed additive with bioresources of the Far East use on productive poultry indexes, on production quality and digestibility of nutritious matters of mixed feed has been studied. Patrinia scabiosifolia, Acanthopanax sesseliflorum, cones of cedare nut husk, brown seaweed, macro- and microelements, vitamins were the object of research. As a result of these researches author presents more effective norms of complex feed additive use in poultry farming of Khabarovsk Kray. The recipe of feed additive from local vegetable resources and complex of vitamins and minerals for use in laying hens nutrition was worked out. The aim of this work was to rise zootechnic and economic indexes of poultry production. The introduction of complex feed additive in ration influenced positively on the digestibility, raised the content of Omega-3 fat acid in egg of laying hens. The increase of Omega-3 fat acid quantity promotes decrease of cholesterol in yolk of egg. In the experimental groups there was a more intensive use of nutrients in diet, mainly due to raw protein, fats, mineral substances – calcium and phosphorus. The use of a new feed additive had a positive effect on the hatchability of eggs, the development of internal organs (heart, liver) and the live weight of chicks obtained from the eggs of chickens in experimental groups. Additionally, the content of mineral substances (calcium, potassium, phosphorus) in the egg of test group was higher than in the control on average by 2.3-5.1%.

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