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The hatching egg is examined with by light beam, with a hyperspectral measuring technology the sex is determined on the basis of the calculated light spectrum. This method works for hatching eggs from sex-linked breeds where male and female birds have different color plumage, all males white-feathered and all females brown-feathered for example ...
However, the rate of development can be affected by a range of factors; including the specific breed, the temperature of incubation, the delay between laying and incubation, and the time of year, raising the need to create a standardised system based on morphology rather than chronological age.
During the last few days of incubation, the residual yolk is retracted into the body cavity as an extension of the intestine. Post hatch, the residual yolk is the only nutrient source of the chicken until exogenous feed is available. Chickens can use the residual yolk for maintenance during the first few days post hatch. [1]
Even in other birds, ambient temperatures can lead to variation in incubation period. [7] Normally the egg is incubated outside the body. However, in one recorded case, the egg incubation occurred entirely within a chicken. The chick hatched inside and emerged from its mother without the shell, leading to internal wounds that killed the mother ...
Broodiness is more common in some chicken breeds than others, indicating that it is a heritable characteristic. Breeds such as Cochin , Cornish and Silkie exhibit a tendency to broodiness, including brooding eggs from other species such as quails , pheasants , turkeys and geese .
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Biden's political remark did not sit well with conservatives, who slammed him for using the opportunity to attack instead of merely honoring Carter's legacy -- and for having the audacity to speak ...
The proactive approach of vaccinating stray dogs, which helps to prevent the disease at its source, has been seen to be the most cost-effective prevention of rabies. In Bangladesh there was a mass dog vaccination campaign between 2010 and 2013, this resulted in a 50% decrease in rabies related deaths. [20]