منابع مشابه
Comparison of two regimes for artifically incubating kiwi eggs
Kiwi hatching success and chick survival were compared under two incubation protocols and two chick-rearing procedures, to fine-tune the procedure and determine best practice in terms of hatching rate, chick survival and growth. Analysis of the combined 1998/1999 and 1999/2000 data show 10 live chicks from 12 eggs incubated under Protocol 1, compared with 7 live chicks from 13 eggs under Protoc...
متن کاملChanges in pituitary somatotroph and lactotroph distribution in laying and incubating turkey hens.
Turkey hens can rapidly shift from a laying condition to one characterized by ovarian regression, incubation behavior, and hyperprolactinemia. Although remarkable changes occur in hormonal profiles as turkey hens pass from a laying to an incubating state, studies have not been undertaken to examine histochemical alterations of functionally relevant pituicytes in the adenohypophysis. The objecti...
متن کاملWater balance in the eggs of the Atlantic salmon Salmo salar.
The osmotic and ionic properties of the eggs of trout and salmon have attracted the interest of physiologists for many years. The eggs are convenient biological material and immense numbers of large, almost identical eggs can readily be obtained. The very slow development of the eggs raises in an acute form the ionic and osmotic problems common to the eggs of all freshwater animals. When shed i...
متن کاملThe time-course of broiler intestinal microbiota development after administration of cecal contents to incubating eggs
BACKGROUND The microbial populations that inhabit the gastrointestinal tract (GIT) are known to influence the health and growth performance of the host. Clean hatcheries and machine-based incubation practices in the commercial poultry industry can lead to the acquisition of aberrant microbiota in the GIT of chickens and a very high level of bird-to-bird variation. The lack of microbial profile ...
متن کاملEffect of short-term pre-hatch heat shock of incubating eggs on subsequent broiler performance
________________________________________________________________________________ Abstract The aim of this study was to investigate the effect of thermal conditioning of broiler chickens during embryonic development on subsequent performance under standard rearing conditions. During incubation eggs from 32-, 45and 56-week old Ross 308 broiler parent stock were subjected to a 2 h heat shock of 39...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1987
ISSN: 0032-5791
DOI: 10.3382/ps.0661835