Behavior of white leghorn laying hens after withdrawal of feed
نویسندگان
چکیده
منابع مشابه
Effect of Different Levels of Dietary Crude Protein, Lysine and Methionine on Performance of White Leghorn Laying Hens
Objective: An experiment was conducted to study the effect of feeding of different levels of dietary crude protein (17.5, 16.5 and 15.5%) with varying levels of lysine (0.77, 0.73 and 0.68%) and methionine (0.36, 0.34 and 0.32%) on performance of white leghorn layers from 34-53 weeks of age. Methodology: Each diet was fed ad libitum to 12 replicates consisting of 88 birds in each replicate. Egg...
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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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The parenchymal cells recorded were dark chief, 21.33%; intermediate, 73.46% and light chief, 5.20% and their dimensions (in microns) were, 17.30 ± 4.49, 19.98 ± 4.15 and 850 ± 8.49, respectively, and mean of serum calcium was 49.66 mg/100 ml.
متن کاملFeed Conversion and Feeding Behaviour in Laying Hens
T_e high proportion of feed costs in total operating expenses (1,2,6) indicates that the utilization of feed by the birds is closely related to the profitability of >oultry operations. The relationship between feed conversion (expressed as a ratio between weight units of feed consumed per weight unit of product) and profitability (defined as an increment .of total income over total costs) is es...
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Concern for the welfare of the hen during an induced molt has been expressed by animal activists groups, poultry scientists, and commercial poultrymen in recent years. Most commercial laying hen molting programs utilize some length of feed removal to initiate a molt. These practices have raised some questions and concerns by the general public regarding the practice of removing feed from laying...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 2000
ISSN: 0032-5791
DOI: 10.1093/ps/79.2.192