Effects of achromatic and chromatic lights on pupillary response, endocrinology, activity, and milk production in dairy cows.

Artificial light can be used as a management tool to increase milk yield in dairy production. However, little is known about how cows respond to the spectral composition of light. The aim of this study was to investigate how dairy cows respond to artificial achromatic and chromatic lights. A tie-sta...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Sofia Lindkvist, Emma Ternman, Sabine Ferneborg, Daniel Bånkestad, Johan Lindqvist, Björn Ekesten, Sigrid Agenäs
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/89ad12cfb532434382537d102de9b6fc
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:89ad12cfb532434382537d102de9b6fc
record_format	dspace
spelling	oai:doaj.org-article:89ad12cfb532434382537d102de9b6fc2021-12-02T20:06:38ZEffects of achromatic and chromatic lights on pupillary response, endocrinology, activity, and milk production in dairy cows.1932-620310.1371/journal.pone.0253776https://doaj.org/article/89ad12cfb532434382537d102de9b6fc2021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0253776https://doaj.org/toc/1932-6203Artificial light can be used as a management tool to increase milk yield in dairy production. However, little is known about how cows respond to the spectral composition of light. The aim of this study was to investigate how dairy cows respond to artificial achromatic and chromatic lights. A tie-stall barn equipped with light-emitting diode (LED) light fixtures was used to create the controlled experimental light environments. Two experiments were conducted, both using dairy cows of Swedish Red and light mixtures with red, blue or white light. In experiment I, the response to light of increasing intensity on pupil size was evaluated in five pregnant non-lactating cows. In experiment II 16h of achromatic and chromatic daylight in combination with dim, achromatic night light, was tested on pregnant lactating cows during five weeks to observe long term effects on milk production, activity and circadian rhythms. Particular focus was given to possible carry over effects of blue light during the day on activity at night since this has been demonstrated in humans. Increasing intensity of white and blue light affected pupil size (P<0.001), but there was no effect on pupil size with increased intensity of red light. Milk yield was maintained throughout experiment II, and plasma melatonin was higher during dim night light than in daylight for all treatments (P<0.001). In conclusion, our results show that LED fixtures emitting red light driving the ipRGCs indirectly via ML-cones, blue light stimulating both S-cones and ipRGCs directly and a mixture of wavelengths (white light) exert similar effects on milk yield and activity in tied-up dairy cows. This suggests that the spectral composition of LED lighting in a barn is secondary to duration and intensity.Sofia LindkvistEmma TernmanSabine FerneborgDaniel BånkestadJohan LindqvistBjörn EkestenSigrid AgenäsPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 7, p e0253776 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sofia Lindkvist Emma Ternman Sabine Ferneborg Daniel Bånkestad Johan Lindqvist Björn Ekesten Sigrid Agenäs Effects of achromatic and chromatic lights on pupillary response, endocrinology, activity, and milk production in dairy cows.
description	Artificial light can be used as a management tool to increase milk yield in dairy production. However, little is known about how cows respond to the spectral composition of light. The aim of this study was to investigate how dairy cows respond to artificial achromatic and chromatic lights. A tie-stall barn equipped with light-emitting diode (LED) light fixtures was used to create the controlled experimental light environments. Two experiments were conducted, both using dairy cows of Swedish Red and light mixtures with red, blue or white light. In experiment I, the response to light of increasing intensity on pupil size was evaluated in five pregnant non-lactating cows. In experiment II 16h of achromatic and chromatic daylight in combination with dim, achromatic night light, was tested on pregnant lactating cows during five weeks to observe long term effects on milk production, activity and circadian rhythms. Particular focus was given to possible carry over effects of blue light during the day on activity at night since this has been demonstrated in humans. Increasing intensity of white and blue light affected pupil size (P<0.001), but there was no effect on pupil size with increased intensity of red light. Milk yield was maintained throughout experiment II, and plasma melatonin was higher during dim night light than in daylight for all treatments (P<0.001). In conclusion, our results show that LED fixtures emitting red light driving the ipRGCs indirectly via ML-cones, blue light stimulating both S-cones and ipRGCs directly and a mixture of wavelengths (white light) exert similar effects on milk yield and activity in tied-up dairy cows. This suggests that the spectral composition of LED lighting in a barn is secondary to duration and intensity.
format	article
author	Sofia Lindkvist Emma Ternman Sabine Ferneborg Daniel Bånkestad Johan Lindqvist Björn Ekesten Sigrid Agenäs
author_facet	Sofia Lindkvist Emma Ternman Sabine Ferneborg Daniel Bånkestad Johan Lindqvist Björn Ekesten Sigrid Agenäs
author_sort	Sofia Lindkvist
title	Effects of achromatic and chromatic lights on pupillary response, endocrinology, activity, and milk production in dairy cows.
title_short	Effects of achromatic and chromatic lights on pupillary response, endocrinology, activity, and milk production in dairy cows.
title_full	Effects of achromatic and chromatic lights on pupillary response, endocrinology, activity, and milk production in dairy cows.
title_fullStr	Effects of achromatic and chromatic lights on pupillary response, endocrinology, activity, and milk production in dairy cows.
title_full_unstemmed	Effects of achromatic and chromatic lights on pupillary response, endocrinology, activity, and milk production in dairy cows.
title_sort	effects of achromatic and chromatic lights on pupillary response, endocrinology, activity, and milk production in dairy cows.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/89ad12cfb532434382537d102de9b6fc
work_keys_str_mv	AT sofialindkvist effectsofachromaticandchromaticlightsonpupillaryresponseendocrinologyactivityandmilkproductionindairycows AT emmaternman effectsofachromaticandchromaticlightsonpupillaryresponseendocrinologyactivityandmilkproductionindairycows AT sabineferneborg effectsofachromaticandchromaticlightsonpupillaryresponseendocrinologyactivityandmilkproductionindairycows AT danielbankestad effectsofachromaticandchromaticlightsonpupillaryresponseendocrinologyactivityandmilkproductionindairycows AT johanlindqvist effectsofachromaticandchromaticlightsonpupillaryresponseendocrinologyactivityandmilkproductionindairycows AT bjornekesten effectsofachromaticandchromaticlightsonpupillaryresponseendocrinologyactivityandmilkproductionindairycows AT sigridagenas effectsofachromaticandchromaticlightsonpupillaryresponseendocrinologyactivityandmilkproductionindairycows
_version_	1718375371823382528

Effects of achromatic and chromatic lights on pupillary response, endocrinology, activity, and milk production in dairy cows.

Ejemplares similares