WHAT IS IMPORTANT IN SWINE PRODUCTION REGARDING LIGHTING?
Pigs have a panoramic vision of 330º, with a preference for monocular vision, which helps them detect danger more effectively. However, their relatively small binocular vision limits their ability to accurately estimate distances, presenting a challenge in spatial awareness despite their overall wide field of view, as showed in Figure 1.
Interactive POS Displays
The visible spectrum refers to the portion of the electromagnetic spectrum that is perceivable by the human eye, commonly known as visible light. Different wavelengths within this spectrum correspond to various colors, with red representing the longest wavelength and violet the shortest. Notably, the visible spectrum perceived by humans differs significantly from that of pigs, as illustrated in Figure 2.
How appropriate lighting does impact the welfare and behavior of pigs
Visible Spectrum of Pigs:
Pigs have a visible spectrum ranging from 380 nm to 694 nm, with peak sensitivities at 439 nm (blue) and 556 nm (green).
Spectral Sensitivity:
There are two types of spectral sensitivity:
• Cone Sensitivity: Based on the types of cones and rods in the eyes.
• Behavioral Responses: More relevant for assessing the welfare and performance of pigs.
Welfare and Performance:
To effectively enhance pigs'welfare and performance, it is crucial to focus on spectral sensitivity related to their behavioral responses.
Benefits of Adapting Light
By adjusting lighting to align with the pig's visible spectrum:
• Vision Improvement: Pigs' vision will be enhanced.
• Behavioral Enhancements: This can lead to better social behavior and more effective use of their environment.
• Stress Reduction: Improved lighting conditions contribute to decreased stress levels in pigs..
