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Pathogenesis of Fowlpox in Laying Hens
Avian Diseases, 1978Egg production dropped after hens were inoculated with fowlpox virus originally isolated from a natural mild infection. The drop started from the 2nd week and continued to the 5th week after inoculation. All birds developed focal lesions at the site of inoculation, and some developed secondary lesions.
D N, Tripathy, L E, Hanson
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Calcium Logistics in the Laying Hen
The Journal of Nutrition, 1987The hourly changes in the Ca2+ content of various physiological compartments in relation to shell formation has been calculated for the domestic hen throughout a 4-d ovulatory sequence. These calculations consider the circadian rhythm in Ca2+ intake when the hen is fed a complete feed or a diet containing oyster shell, the effect of the stage of the ...
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Climatic adaptation of laying hens
Tropical Animal Health and Production, 1994Three hundred Warren Isabrown female day old chicks were raised for 18 weeks in 3 distinct artificial climates described as temperate (20 degrees C, 60% RH), hot dry (32 degrees C, 40% RH) and hot humid (32 degrees C, 90% RH). At 18 weeks each group was divided into 3 and re-allocated to 3 similar air-conditioned laying rooms as during the growing ...
Njoya, J., Picard, M.
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Fluoride tolerance of laying hens
British Poultry Science, 19971. One thousand Silver Grey Hyline hens were given drinking water containing 5 concentrations of added sodium fluoride (0, 6, 10, 14 and 20 mg/l) over a 17-week growth and 57-week laying period. The natural fluoride content of the water was 0.21 mg/l during the growing period and 0.29 mg/l throughout lay. 2. During the rearing phase, efficiency of food
C B, Coetzee, N H, Casey, J A, Meyer
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Antifertilityeffects of clonidine in laying hens
Experientia, 1981Clonidine was anovulatory and markedly antigonadal in laying hens when infused for 1 week from minipump implants at daily rates of 1.08 mg per hen or greater. The ovaries of hens treated with clonidine responded to FSH injections which suggests that the antigonadal effect of clonidine resulted from a reduction in the output of gonadotropin by the ...
R M, Weppelman +4 more
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Utilization of Urea in Laying Hens
Archiv für Tierernaehrung, 1986K, Gruhn, A, Hennig
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Corticosteroids in Laying Hens
1980In the literature adrenal hormones have often been related to stress and sometimes equalised as stress hormones.
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Tetrachlorvinphos metabolism in laying hens
Journal of Agricultural and Food Chemistry, 1981M H, Akhtar, T S, Foster
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1994
The excrement of laying hens represent a sometimes important volume but above all non negligible quantities of nitrogen used to decrease the surplus of animal excrements in certain cantons under the " nitrate " directive. The article gives technical references of droppings production in terms of quantity and quality. In view of existing disparities, it
Bertrand, M. +4 more
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The excrement of laying hens represent a sometimes important volume but above all non negligible quantities of nitrogen used to decrease the surplus of animal excrements in certain cantons under the " nitrate " directive. The article gives technical references of droppings production in terms of quantity and quality. In view of existing disparities, it
Bertrand, M. +4 more
openaire +1 more source