Evidence map›Paper›PMID 31623071›Full record

ArticleAnimals : an open access journal from MDPI2019

Effects of LED Light Color and Intensity on Feather Pecking and Fear Responses of Layer Breeders in Natural Mating Colony Cages.

Haipeng Shi, Baoming Li, Qin Tong, Weichao Zheng, Dan Zeng, Guobin Feng

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Animals : an open access journal from MDPI, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
  4. Review
  5. Article
  6. BioClocks UK: driving robust cycles of discovery to impact.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
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  8. Article
  9. Deep Learning Methods for Tracking the Locomotion of Individual Chickens.Animals : an open access journal from MDPI · 2024
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Effects of Key Farm Management Practices on Pullets Welfare-A Review.Animals : an open access journal from MDPI · 2022
    Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. Impact of Housing Environment on the Immune System in Chickens: A Review.Animals : an open access journal from MDPI · 2020
    Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Haipeng ShiDepartment of Agricultural Structure and Bioenvironmental Engineering, College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, China. shihaipeng@cau.edu.cn.
Baoming LiDepartment of Agricultural Structure and Bioenvironmental Engineering, College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, China. libm@cau.edu.cn.ORCID 0000-0001-5368-4969
Qin TongDepartment of Agricultural Structure and Bioenvironmental Engineering, College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, China. tongqin@cau.edu.cn.
Weichao ZhengDepartment of Agricultural Structure and Bioenvironmental Engineering, College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, China. weichaozheng@cau.edu.cn.
Dan ZengHebei Industrial Technology Research Institute of Layers, Handan 056800, China. 15101124340@163.com.
Guobin FengHebei Industrial Technology Research Institute of Layers, Handan 056800, China. feng181020@sina.com.

Funding

National Key R&D Program of China 2017YFB0404000
6 · The paper itself

Abstract

Natural mating colony cages for layer breeders have become commonplace for layer breeders in China. However, feather pecking (FP) and cannibalism are prominent in this system. The objective of this study was to investigate the effects of four light-emitting diode (LED) light colors (white: WL, red: RL, yellow-orange: YO, blue-green: BG) with two light intensities for each color, on FP, plumage condition, cannibalism, fear, and stress. A total of 32 identical cages were used for the eight treatments (four replicates for each treatment). For both light intensities, hens in RL had a lowest frequency of severe FP, whereas hens in WL had the highest frequency of severe FP. Hens in RL and BG had better plumage conditions than in WL and YO. Compared with RL and BG treatments, hens treated with WL and YO had a significantly longer tonic immobility (TI) duration. Hens treated with RL had a higher concentration of 5-hydroxytryptamine (5-HT), a lower concentration of corticosterone (CORT), and a lower heterophil to lymphocyte ratio than WL and YO. Furthermore, RL could significantly reduce mortality from cannibalism. Overall, hens treated with RL and low light intensity showed a lower frequency of severe FP, less damaged plumage, were less fearful, had lower physiological indicators of stress, and had reduced mortality from cannibalism. Transforming the light color to red or dimming the light could be regarded as an effective method to reduce the risk of FP and alleviate the fear responses of layer breeders.

Indexed as

animal welfarecannibalismfeather peckinglight illuminancelight spectrumpoultry

Identifiers

PMID31623071
PMCPMC6826393

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.