Effect of the addition of ultraviolet light on broiler growth, fear, and stress response

House, G.M.; Sobotik, Eric B.; Nelson, Jill R.; Archer, Gregory S.

doi:10.1016/j.japr.2020.01.003

Cited by 27 publications

(23 citation statements)

References 31 publications

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“…A more recent study on the impacts of specifically UVA supplementation, reared broilers with LED light only or LED light with additional UVA lights (House et al, 2020a). Results across several physiological stress measures and behavioral tests of fear showed the UVA supplementation reduced stress [lower heterophil/lymphocyte (H/L) ratio, composite asymmetry, and plasma corticosterone] and fear (shorter tonic immobility duration, lower wing flapping during inversion) although there were no effects on immune responses, body weight or feed conversion ratio (House et al, 2020a). Another study by James et al (2018James et al ( , 2020 supplemented both UVA and UVB to look at the different impacts of both types of UV radiation.…”

Section: Effects Of Uv Light In Meat Chickens (Excluding Breeder Birds)mentioning

confidence: 99%

Application of Ultraviolet Light for Poultry Production: A Review of Impacts on Behavior, Physiology, and Production

Rana

Campbell

2021

Front. Anim. Sci.

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The application of ultraviolet (UV) light in poultry production is garnering increased interest with the drive toward improved poultry welfare and optimized production. Poultry can see in the UV spectrum (UVA wavelengths: 320–400 nm) thus inclusion of these shorter wavelengths may be viewed as more natural but are typically excluded in conventional artificial lights. Furthermore, UVB wavelengths (280–315) have physiological impact through stimulation of vitamin D pathways that can then improve skeletal health. However, better understanding of the effects of UV supplementation must occur before implementation practically. This non-systematic literature review aimed to summarize the impacts of UV supplementation on the behavior, welfare, and production of laying hens, meat chickens (breeders and growers), and other domestic poultry species including directions for future research. The literature demonstrated that UVA light has positive impacts on reducing fear and stress responses but in some research, it significantly increases feather pecking over age during the production phase. UVB light will significantly improve skeletal health, but an optimum duration of exposure is necessary to get this benefit. Supplementation with UVB light may have more distinct impacts on egg production and eggshell quality when hens are experiencing a dietary vitamin D3 deficiency, or if they are at the terminal end of production. The relative benefits of UVB supplementation across different ages needs to be further verified along with commercial trials to confirm beneficial or detrimental impacts of adding UVA wavelengths. Further research is warranted to determine whether adding natural light wavelengths to indoor poultry production is indeed a positive step toward optimizing commercial housing systems.

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Section: Effects Of Uv Light In Meat Chickens (Excluding Breeder Birds)mentioning

confidence: 99%

Application of Ultraviolet Light for Poultry Production: A Review of Impacts on Behavior, Physiology, and Production

Rana

Campbell

2021

Front. Anim. Sci.

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“…Likewise, Archer [133] reported a lower H/L ratio in laying hens under red light compared to white light, while Hassan et al [134] did not note a difference in the H/L ratio under different light colors. However, recent studies showed that UV light lowers the H/L ratio in laying hens [135] and broilers [136]. The number of intraepithelial lymphocytes and IgA+ cells in cecal tonsils and in the small intestine were shown to be higher under green and blue light compared to red light [137,138].…”

Section: Light Color/wavelengthmentioning

confidence: 94%

“…Certain light colors also have a positive influence on animal welfare and stress load. Lower CORT concentrations were observed when chickens were housed under red light compared to white light [ 132 , 133 ] or if exposed to UV [ 135 , 136 ]. Xie et al [ 140 ] reported alleviated stress levels especially under blue light.…”

Section: Impact Of Light Regime On the Immune System In Chickensmentioning

confidence: 99%

“…Xie et al [ 140 ] reported alleviated stress levels especially under blue light. Similarly, chickens displayed lower fear responses (TI reaction) under UV light [ 135 , 136 ] or under green and blue light compared to red light [ 148 ] or white light [ 132 ]. Hence, light color may be an additional management tool to alleviate stress and fear responses in chickens, thereby improving immune functions.…”

Section: Impact Of Light Regime On the Immune System In Chickensmentioning

confidence: 99%

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Impact of Housing Environment on the Immune System in Chickens: A Review

Hofmann

Schmucker

Bessei

et al. 2020

Animals

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During their lifespan, chickens are confronted with a wide range of acute and chronic stressors in their housing environment that may threaten their welfare and health by modulating the immune system. Especially chronic stressful conditions can exceed the individual’s allostatic load, with negative consequences for immunity. A fully functional immune system is mandatory for health and welfare and, consequently, also for high productivity and safe animal products. This review provides a comprehensive overview of the impact of housing form, light regime as well as aerial ammonia and hydrogen sulfide concentrations on the immune system in chickens. Certain housing conditions are clearly associated with immunological alterations which potentially impair the success of vaccinations or affect disease susceptibility. Such poor conditions counteract sustainable poultry production. This review also outlines current knowledge gaps and provides recommendations for future research.

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“…What's more, exposure to FIR might improve protein metabolism and decrease the emission of ammonia of broilers, as a result, reducing the secretion of nitrogen to environment ( Son, 2015 ). Moreover, broilers reared under UV light have lower stress susceptibility and fear responses, which may be critical to maximize welfare and growth performance of broilers ( House et al, 2020 ; James et al, 2020 ).…”

Section: Effects Of Light Parameters On Health and Growth Of Broilersmentioning

confidence: 99%

Light regimen on health and growth of broilers: an update review

Huang

Quan

et al. 2022

Poultry Science

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The importance of lighting regimen is increasing with the industrialization of poultry production, as lighting has been intimately associated with not only the establishment of rhythm and synchronous physiology of broiler chickens, but also the secretion of hormones associated with broiler maturation and growth. In recent years, increasing attention has been paid to the effects of lighting management on growth performance, immune status, and welfare of broilers. An appropriate lighting regimen, including proper source of lighting, intensity, duration, and wavelength (color) of light, is crucial to improve the growth performance and welfare of broilers. In this review, we updated the impacts of different light regimens on health and growth performance of broilers.

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Effect of the addition of ultraviolet light on broiler growth, fear, and stress response

Cited by 27 publications

References 31 publications

Application of Ultraviolet Light for Poultry Production: A Review of Impacts on Behavior, Physiology, and Production

Application of Ultraviolet Light for Poultry Production: A Review of Impacts on Behavior, Physiology, and Production

Impact of Housing Environment on the Immune System in Chickens: A Review

Light regimen on health and growth of broilers: an update review

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