| Titles |
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English :
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Effect of high temperature and ascorbic acid injection during incubation in Muscovy duck eggs on thermoregulation and bone characteristics,
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Arabic :
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تأثير الحرارة المرتفعة و حقن حمض الاسكوربيك خلال تفريخ بيض البط المسكوفى على التنظيم الحرارى و صفا ت العظام
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| Abstract |
The main objective of this study was to elucidate the effects of high temperature during late incubation with injection of ascorbic acid on bone development and the ability of post hatched ducklings to cope with subsequent heat stress conditions during the growing period.
A total of 900 Muscovy duck eggs were divided into two groups, the first group (450 eggs) was maintained at the recommended incubation temperature (37.5 °C), while the second group (450 eggs) was exposed to 39°C at last 4 days of incubation Eggs from each group were divided into three treatments, the first and second were used as control and, sham control (0.5 m1 of physiological saline/egg) respectively, the third treatment was injected 0.5 m1 of physiological saline plus 5 mg ascorbic acid ( AA).
During the experimental period all of the ducklings were fed ad-libitum and they received similar hygienic and managerial conditions. The rearing temperature was 33.6-37°C during the entire experimental period. The results indicated that hatchability increased and late embryonic mortality percentages decreased significantly by AA injection as compared to the control during heat incubation. Pre-hatching exposure of eggs to 39°C did not significantly affect the post-hatching body weight and weight gain at the starter phase of growth (3 wk), while vitamin C increased it. Body temperature was significantly decreased by the pre hatching temperature or injected ascorbic acid as compared to the control at week 3 of age. Bone measurements were negatively affected by high incubation temperature but, these measurements were significantly improved by AA injection as compared to the control at week 30 of age.
It was concluded that pre-hatching exposure of duck eggs to high temperature had a positive effect on thermoregulation. Ascorbic acid injection can be recommended for alleviating the deleterious effects of heat stress on bone measurements during this period.
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| Publication year |
2013
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| Pages |
281-295
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| Availability location |
معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
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| Availability number |
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| Organization Name |
Animal Production Research Institute (APRI)
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| serial title |
The 4th Scientific Conference of Animal Production Research Institute (APRI)
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| Author(s) from ARC |
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| Agris Categories |
Animal physiology - NutritionAnimal physiology - Reproduction
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AGROVOC
TERMS |
Ascorbic acid.
Ducks.
Growth period.
Heat.
Heat stress.
Young animals.
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| Proposed Agrovoc |
bone development;
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| Publication Type |
Conference/Workshop
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