Methods for controlling sex of oviparous embryos using light sources
The sex of embryos in eggs is influenced or controlled through the application of light having selected wavelengths in order to promote the development of embryos of a selected sex. An incubating device is provided having an interior cavity that can be sealed from an outside, and having a plurality of lighting elements disposed on each of a plurality of trays disposed in the interior cavity. Eggs are disposed on the trays, and pre-determined environmental conditions are applied to the interior cavity to promote hatching of the eggs. Concurrently with the application of the environmental conditions, the eggs are irradiated according to pre-determined lighting conditions. The lighting conditions include applying light having wavelengths substantially concentrated in selected ranges, such as light wavelengths within the 390-419 nm, 410-450 nm, 420-450 nm, 450-495 nm, or other narrow range.
1. A method of promoting hatching of a plurality of eggs comprising:
disposing the plurality of eggs in an incubating device having a plurality of trays configured to receive the plurality of eggs for incubation;
selecting, based on a sex-ratio to be promoted in embryos of the plurality of eggs, a narrow range of wavelengths for a spectrum of light with which to irradiate the plurality of eggs; and
emitting light from a plurality of lighting elements onto the plurality of eggs, the plurality of lighting elements comprising a first set of lighting elements having the selected narrow range of wavelengths including a spectrum substantially concentrated within a blue wavelength range to promote the sex-ratio in the embryos and a second set of lighting elements emitting light having a spectrum substantially concentrated within a red wavelength range to promote hatching of the plurality of eggs.
2. The method of claim 1 further comprising the step of:
activating the first and second sets of lighting elements at a predetermined lighting intensity to promote hatching of the eggs and promote the sex-ratio in the embryos of the eggs.
3. The method of claim 1 further comprising the step of:
activating the first and second sets of lighting elements on a continuous basis to promote hatching of the eggs.
4. The method of claim 1 further comprising the step of:
activating the first and second sets of lighting elements in a time-varying basis to promote hatching of the eggs.
5. The method of claim 1 further comprising the step of:
dimming the first and second sets of lighting elements to promote hatching of the eggs.
6. The method of claim 1 further comprising the step of:
synchronously activating the first and second sets of lighting elements to promote hatching of the eggs.
7. The method of claim 1 further comprising the step of:
activating the first set of lighting elements for a first period of time and activating the second set of lighting elements for a second period of time to promote hatching of the eggs.
8. The method of claim 7 wherein the first period of time and the second period of time are different.