منابع مشابه
Effects of a combined hatching and brooding system on hatchability, chick weight, and mortality in broilers.
Chicks hatch over a time window of approximately 36 to 48 h and are removed from the hatchers only when the majority of the chicks has hatched. Consequently, chicks are exposed to prolonged posthatch holding periods and delays in feed and water access, leading to dehydration and impaired posthatch performance. It is questionable whether the physiological requirements of the hatchlings can be me...
متن کاملEarly Chick and Poultry Mortality
Birds that are hatched early, or from small eggs, may have reduced blood glucose levels when taken from the hatcher. Chicks and poults are subjected to various procedures in the hatchery, each adding to the stress load on the animal. As the stress load increases the demand for blood glucose increases, with the result that adrenalin is secreted and glycogen reserves are mobilized from the body. ...
متن کاملInfluence of air composition during egg storage on egg characteristics, embryonic development, hatchability, and chick quality.
Egg storage beyond 7 d is associated with an increase in incubation duration and a decrease in hatchability and chick quality. Negative effects of prolonged egg storage may be caused by changes in the embryo, by changes in egg characteristics, or by both. An adjustment in storage air composition may reduce negative effects of prolonged egg storage because it may prevent changes in the embryo an...
متن کاملInfluence of egg storage time and preincubation warming profile on embryonic development, hatchability, and chick quality.
When eggs are stored beyond 7 d, hatchability and chick quality decrease. The cause of the negative effects of prolonged egg storage is not clear. The negative effects may be caused by a decrease in embryo viability due to an increase in cell death. The optimal time and curve of preincubation warming (the preincubation warming profile) may be different for eggs stored over short and long period...
متن کاملEffects of Age of Broiler Breeders and Egg Storage on Egg Quality, Hatchability, Chick Quality, Chick Weight, and Chick Posthatch Growth to Forty-Two Days
Nutritional and environmental conditions influence broiler flock performance. Besides these factors, other less-well-understood factors, such as incubating egg characteristics, affect the embryonic life of chicks. This study demonstrated that egg storage depressed egg albumen Haugh units (HU) and chick quality; these effects of storage were greater in egg and chicks from old breeders. Absolute ...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1921
ISSN: 0032-5791
DOI: 10.3382/ps.0010033