Lighting environment: What colour of light do male C57BL/6J prefer?

Paronis, Efthymios; Kapogiannatou, Aspasia; Paschidis, Konstantinos; Stasinopoulou, Marianna; Alexakos, Pavlos; Skaliora, Irini; Kostomitsopoulos, Nikolaos

doi:10.1016/j.applanim.2018.08.018

Cited by 3 publications

(4 citation statements)

References 14 publications

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“…However, this preference diminished in the third experimental week to appear only on the early morning and late evening hours, before completely fading in the fifth experimental week. Though it remains unclear why pigs had an initial preference for the colour temperature of 3000 K and no colour temperature preference anymore at the end of the experiment, this preference for "warmer" reddish light has also been observed in mice that were given the choice of being exposed to a colour temperature of 2500 K or 4000 K at 91 lux [13]. Kapogiannatou et al [14] observed that mice were less stressed under a light colour temperature of 2500 K than one of 4000 K at 60 lux, while spontaneous behaviours and locomotor activity levels were unaffected.…”

Section: Discussionmentioning

confidence: 97%

“…In pigs, the maximum sensitivity is at 439 nm for the blue cone and 556 nm for the green cone, whereas the L-cone responsible for recording the long-wave spectra (>650 nm) is missing [12]. Certain light wavelengths have been reported to affect the behaviour, performance and welfare of broiler chickens [7,8], mice [13,14] and dairy cows [15]. However, to our knowledge, no study ever investigated the influence of different light colour temperatures on the behaviour of pigs.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Different LED Light Colour Temperatures on the Preference Behaviour of Weaned Piglets

et al. 2020

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This study investigates the effect of different LED lighting colour temperatures on the preference behaviour of 4-week-old weaned piglets. A total of 32 piglets were housed in two replications in an experimental pen area with four identically equipped pen compartments connected two by two. Each pen unit offered a compartment set to a colour temperature of 3000 kelvin and another set to 6500 kelvin, at 80 lux during the day. Each piglet could freely choose between the two compartments by using a passageway. Over a period of five weeks, the behaviours “lying”, “eating” and “activity” were video recorded for 72 h during the 1st, 3rd and 5th week of the experiment. The location of the piglet in the pen and its behaviour were determined by using time sampling. In the first week, the piglets preferred the colour temperature of 3000 K to perform all behaviours. In the following weeks this preference decreased. Results also show that feed consumption and soiling of the pens were higher under 6500 K. Pigs can differentiate between the different colour temperatures and use them for different behaviours. This can be used to divide pens into functional areas in order to better suit the behavioural needs of pigs.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Influence of Different LED Light Colour Temperatures on the Preference Behaviour of Weaned Piglets

et al. 2020

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“…Cattle can differentiate between red and blue, and red- and green-coloured light, but have a limited ability to differentiate between blue and green [ 26 ]. Although no studies currently exist on whether cattle can differentiate between full-spectrum white light and single wavelengths, there is evidence to suggest that other dichromatic mammals can distinguish colour temperature [ 17 , 27 ]. Colour temperature is expressed in Kelvin, which indicates the relative colour of white light.…”

Section: Discussionmentioning

confidence: 99%

“…Cattle have cones that are maximally sensitive at 554 and 455 nm [ 20 ] and pigs have cones sensitive to 556 and 439 nm [ 29 ]. Furthermore, Paronis et al [ 27 ] found male laboratory mice spent more time in cages with warm fluorescent lighting (2500 K) compared to cool fluorescent lighting (4000 K). Cattle, pigs, and mice all have cone photoreceptors sensitive to short and medium wavelengths.…”

Section: Discussionmentioning

confidence: 99%

Preferences of Dairy Cattle for Supplemental Light-Emitting Diode Lighting in the Resting Area

Wilson

Wright

Cant

et al. 2022

Animals

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Light from the environment is important for vision and regulating various biological processes. Providing supplemental lighting in the stall area could allow for individually targeted or group-level control of light. This study aimed to determine whether dairy cattle had preferences for short-term exposure to white (full-spectrum) light-emitting diode (LED) light or no LED light, yellow-green or white LED light, and blue or white LED light in the stall area. In total, 14 lactating cows were housed in a free-stall pen with unrestricted access to 28 stalls. LED light was controlled separately for each side of the stall platform. Two combinations of light were tested per week, and each week consisted of three adaptation days and four treatment days. Lying behaviour and video data were recorded continuously using leg-mounted pedometers and cameras, respectively. Preference was assessed by the amount of time spent lying and the number of bouts under each light treatment. No differences occurred between treatments within each week for daily lying time and number of bouts. Similarly, no differences occurred between treatments within each time period. Further controlled studies of long-term exposure to different LED wavelengths and intensities are required to determine potential benefits on metabolic processes.

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Effects of Illumination Color on Hypothalamic Appetite-Regulating Gene Expression and Glycolipid Metabolism

Wang,

Li,

Quan

et al. 2024

Nutrients

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Irregular illumination is a newly discovered ambient factor that affects dietary and metabolic processes. However, the effect of the modulation of long-term light exposure on appetite and metabolism remains elusive. Therefore, in this current study, we systematically investigated the effects of up to 8 weeks of exposure to red (RL), green (GL), and white light (WL) environments on appetite, food preferences, and glucose homeostasis in mice on both high-fat and low-fat dietary patterns. It was found that the RL group exacerbated high-fat-induced obesity in mice compared with GL- or WL-treated mice. RL-exposed mice exhibited worsened metabolic profiles, including impaired glucose tolerance/insulin sensitivity, elevated lipid levels, and reduced serum insulin levels. Serological analyses showed that RL exposure resulted in decreased leptin levels and increased levels of orexigenic and hunger hormones in mice. Further qPCR analysis showed that the expression levels of the hypothalamic appetite-related genes NPY and AgRP mRNA were upregulated in RL-treated mice, while the expression level of the appetite suppressor gene POMC mRNA was downregulated. The results of this study will be instructive for the regulation of appetite and metabolism from the perspective of illumination colors.

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Lighting environment: What colour of light do male C57BL/6J prefer?

Cited by 3 publications

References 14 publications

Influence of Different LED Light Colour Temperatures on the Preference Behaviour of Weaned Piglets

Influence of Different LED Light Colour Temperatures on the Preference Behaviour of Weaned Piglets

Preferences of Dairy Cattle for Supplemental Light-Emitting Diode Lighting in the Resting Area

Effects of Illumination Color on Hypothalamic Appetite-Regulating Gene Expression and Glycolipid Metabolism

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