Candling
Candling
Candling (pronounced: /ˈkændlɪŋ/) is a practice used in embryology to study the growth and development of an embryo inside an egg. The term is derived from the traditional practice of using a bright light source, typically a candle, to observe the interior of an egg.
Etymology
The term "candling" comes from the method's historical practice of using candles as the light source. Today, most candlers use a bright electric light, but the term has stuck.
Procedure
Candling involves shining a light source directly onto the shell of an egg and observing the interior contents. The light penetrates the eggshell, allowing the observer to see the growing embryo inside. This method is used to check the egg's viability and to monitor the embryo's development.
Applications
Candling is commonly used in the poultry industry to determine whether eggs are fertile or infertile. It is also used in avian veterinary medicine to monitor the health and development of bird embryos. In addition, candling can be used to detect blood spots or meat spots in egg yolks.
Related Terms
- Embryo: An animal or plant in the early stages of development after fertilization.
- Eggshell: The outer covering of a bird's egg, composed mainly of calcium carbonate.
- Veterinary medicine: The branch of medicine that deals with the prevention, diagnosis, and treatment of disease, disorder, and injury in animals.
External links
- Medical encyclopedia article on Candling
- Wikipedia's article - Candling
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