IgY Production by Taiwan Native Tsaiya Ducks and White Leghorn Laying Hens
نویسندگان
چکیده
منابع مشابه
eggshell formation in Tsaiya ducks and Leghorn hens. DIETARY CALCIUM EFFECT ON CALCIUM AND MAGNESIUM CONTENT IN EGGSHELL
Tsaiya ducks and Leghorn hens are the two major laying birds raised in Taiwan. They are all excellent egg layers. Tsaiya ducks are small in body size (1.3 kg) with bigger egg weight (65 g) and stronger eggshell breaking strength than eggs from hens. The eggshell consists mainly of calcium carbonate, hence calcium plays an important role in the eggshell formation. Magnesium is also present in eg...
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s of papers 89 feed, warmth and potential negative social interaction are potential factors that could affect mortality immediately after hatch. The post-hatch body weight at time of mortality used as a risk factor indicated that the divergently selected lines have about the same risk and less sensitive to reduced body weight compared to the control population. Through survival analysis, this s...
متن کاملEgg production curve fitting using nonlinear models for selected and nonselected lines of White Leghorn hens.
Egg production curves describe the laying patterns of hen populations over time. The objectives of this study were to fit the weekly egg production rate of selected and nonselected lines of a White Leghorn hen population, using nonlinear and segmented polynomial models, and to study how the selection process changed the egg-laying patterns between these 2 lines. Weekly egg production rates over...
متن کاملEffect of Inoculation Route on the Production of Antibodies and Histological Characteristics of the Spleen in Laying Hens
Recent studies have reported the use of IgY antibody in the prevention or treatment of diseases in animals. IgY can be obtained in large amounts from the yolk of chicken eggs through a low-cost process. This study evaluated the effect of different routes of inoculation on antibody production and spleen morphological characteristics of laying hens (White Leghorn) inoculated with sheep red blood ...
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Prolactin is considered to influence the taking of pauses in between ovulatory sequences in White Leghorn hens. Therefore modulating concentrations of prolactin using bromocriptine a dopamine agonist during early life (17 to 36 weeks of age) could overcome the inhibitory effects of high concentration of prolactin on ovarian activity. The effect of modulation of prolactin concentration on egg pr...
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ژورنال
عنوان ژورنال: Journal of Agricultural Science
سال: 2014
ISSN: 1916-9760,1916-9752
DOI: 10.5539/jas.v6n9p106