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A Study on Light Preference in Gilts via Behavioral Pattern Analysis.

Shaojuan Ge1, Haiyun Ma2, Xiusong Li3

  • 1Department of Agricultural Structure and Environmental Engineering, College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China.

Animals : an Open Access Journal From MDPI
|September 13, 2025
PubMed
Summary
This summary is machine-generated.

Gilts (young female pigs) prefer green light, spending more time in it and eating less. White light maximizes gilt activity, informing precision lighting for better animal welfare and farm productivity.

Keywords:
behavioral analysisgiltslight color preferenceprecision livestock farming

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Area of Science:

  • Animal Science
  • Agricultural Engineering
  • Ethology

Background:

  • Artificial lighting in pig housing is crucial for animal welfare and farm economics.
  • Understanding gilt (young female pig) light preferences is key for optimizing production environments.
  • Precision lighting protocols can enhance gilt health and reproductive performance.

Purpose of the Study:

  • To determine the optimal light environments for gilts using self-selection photic preference testing.
  • To provide insights for developing welfare-centric precision lighting in swine production.
  • To investigate gilt behavioral responses to different light spectra and intensities.

Main Methods:

  • A dynamic multi-chromatic self-selection system with RGBW-LEDs was developed for spectral control.
  • Twenty-four gilts were housed for five weeks, with free access to white, yellow, green, blue, and red light zones (100 lux).
  • A YOLOv8n deep learning framework quantified gilt distribution, activity, and eating behavior in real-time.

Main Results:

  • Gilts showed a significant preference for green light (21.29% distribution), particularly during specific daytime and evening periods.
  • Average gilt activity was highest under white light (25.49%), significantly more than yellow or green light.
  • Daily feed consumption was lowest under green light, significantly less than under white, blue, or red light.

Conclusions:

  • Green light environments are preferred by gilts, potentially indicating reduced stress or enhanced comfort.
  • White light may promote higher activity levels, which could be beneficial for certain production stages.
  • Manipulating light color offers a promising avenue for improving gilt welfare and potentially influencing feeding patterns in swine production.