In the commercial egg industry, male chicks are often culled because they cannot lay eggs and are not suitable for meat production. However, this practice is inhumane and has led to the development of new technologies to sex chicken eggs before they hatch. One such technology is laser spectroscopy, which allows scientists to determine the sex of a chicken egg embryo with a high degree of accuracy.
Laser spectroscopy works by shining a laser beam through the eggshell and measuring the light that is scattered back. The scattered light can provide information on the composition of the egg, including the presence of pigments, proteins, and other molecules. Scientists have found that the sex of a chicken egg can be determined by measuring the levels of certain pigments, such as biliverdin and protoporphyrin, that are present in the yolk of the egg.
One of the advantages of laser spectroscopy is that it can be used to sex chicken eggs at an early stage of development, before the embryos have developed into distinct sexes. This means that the sex of the egg can be determined before it hatches, allowing for the culling of only male eggs and the hatching of only female eggs. This can significantly reduce the number of male chicks that are culled each year.
It's worth noting that laser spectroscopy is not the only technology being developed to sex chicken eggs before hatching. Other methods include genetic engineering, in-ovo sexing, and microfluidic methods. These methods can also provide accurate and non-invasive ways to sex chicken eggs.
In summary, scientists are using laser spectroscopy as a tool to sex chicken egg embryos. This technology allows for the identification of the sex of a chick while it is still inside the egg, before it hatches. This means that only female chicks are hatched and raised for egg production, eliminating the need to cull male chicks. This technology can provide a more humane and sustainable alternative to the traditional practice of culling male chicks, but it's not the only one available, and further research is needed to improve and implement it on a large scale.