Related Experiment Video
Updated: Dec 16, 2025
High Throughput Assay to Examine Egg-Laying Preferences of Individual Drosophila melanogaster
Published on: March 24, 2016
Targeted differential monochromatic lighting improves broiler breeder reproductive performance
Sagi Zaguri1, Joanna Bartman1, Natalie Avital-Cohen1
1Department of Animal Sciences, Robert H. Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, Rehovot, Israel.
Targeted light stimulation, using long-day red light for extraretinal photoreceptors and short-day blue or green light for retinal photoreceptors, significantly boosted reproductive performance in broiler breeders. This approach enhances egg production and gonadal activity.
Area of Science:
- Avian biology
- Photobiology
- Animal reproduction
Background:
- Avian light perception involves both retinal and extraretinal photoreceptors.
- Extraretinal photostimulation generally increases reproductive performance, while retinal stimulation can decrease it.
- Differential light wavelengths (green for retina, red for extraretinal) and blue light's effect on retinal receptors are key factors.
Purpose of the Study:
- To investigate the "brain activate/eye deactivate" hypothesis in broiler breeders.
- To determine the impact of targeted photostimulation on gonadal axis activity and reproductive performance.
- To compare the effects of different light treatments on egg production, fertility, and hatchability.
Main Methods:
- Broiler breeders (ROSS 308) were exposed to five light treatments: warm white (control), red-green, green-red, red-blue, and blue-red, using LED lamps from 20 to 55 weeks of age.
- Reproductive parameters including egg production, fertility, and hatchability were monitored.
- Plasma analysis and gene expression trials were conducted on tissue samples.
Main Results:
- Long-day red light (extraretinal) combined with short-day blue or green light (retinal) significantly improved egg production and gonadal axis activity compared to controls.
- Long-day green light negatively impacted reproductive performance.
- Targeted photostimulation protocols enhanced reproductive and gonadal activities.
Conclusions:
- The "brain activate/eye deactivate" hypothesis is supported in broiler breeders.
- Strategic manipulation of light wavelengths and photoperiods can optimize avian reproductive efficiency.
- Targeted photostimulation offers a promising method for enhancing broiler breeder performance.
More Related Videos
Related Concept Videos
02:27Background and Environment Affect Phenotype
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
01:11Testing a Claim about Mean: Known Population SD
Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...