Perinatal broiler physiology between hatching and chick collection in 2 hatching systems
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چکیده
منابع مشابه
BIBLIOGRÁFICA - Broiler adaptation to post - hatching period
In the latest years more attention has been given to mechanisms for bird adaptation at post-hatching period by management of environmental conditions and formulations of diets offered during this period when digestive, immune, and thermo-regulating systems suffer slight changes. In posthatching period, digestive system is anatomically complete, but its functionality is still immature in relatio...
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Elise D. Ferree, Janis Dickinson, Wallace Rendell, Caitlin Stern, and Stephanie Porter Cornell Lab of Ornithology, Cornell University, Ithaca, NY 14850, USA, Department of Natural Resources, Cornell University, Ithaca, NY 14850, USA, Department of Biosciences, Loyalist College, Belleville, Ontario K8N 2H4, Canada, Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14850, US...
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Fertile eggs from Cobb 500 broiler breeder hens were incubated to provide low starting egg shell temperatures (EST; 36.9°C to 37.3°C) which were gradually increased to 37.8°C during the first 7 to 15 days of incubation compared with eggs incubated with a constant EST of 37.8°C (standard conditions) over the first 18 days of incubation. Time of individual chick hatching (measured at 6 h interval...
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We present a method for drawing lines on an object that depict both the shape and shading of the object. To do so, we construct a gradient field of the diffuse intensity of the surface to guide a set of adaptively spaced lines. The shape of these lines reflect the lighting under which the object is being viewed and its shape. When the light source is placed at the viewer’s location, these lines...
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Incubation temperature plays a prominent role in shaping the phenotypes and fitness of embryos, including affecting developmental rates. In many taxa, including turtles, eggs are deposited in layers such that thermal gradients alter developmental rates within a nest. Despite this thermal effect, a nascent body of experimental work on environmentally cued hatching in turtles has revealed unexpec...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 2013
ISSN: 0032-5791
DOI: 10.3382/ps.2012-02534