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Sleep in beef cattle recorded using non-invasive device

Grant number: 22/16529-0
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): October 01, 2023
Effective date (End): June 30, 2025
Field of knowledge:Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
Principal Investigator:Danilo Domingues Millen
Grantee:Ana Laura Januário Lelis
Host Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil


Like humans, cattle also require a minimum amount of restorative sleep for their metabolic functions to be properly regulated, resulting in improved performance and in a reduced risk ofinflammation. The stages of sleep are basically divided into 1) REM (rapid eye movement), 2) non-REM (also known as deep sleep), and 3) light sleep. It is during the REM and non-REM sleep stages that hormone depletion occurs, as well as muscle and neurological recovery.However, little is known about the relationship between sleep quality and beef cattleproductivity and welfare, and the few studies available in the literature focused on the sleep physiology of dairy cows. Therefore, we propose in this project an evaluation of a methodology to measure sleep, as well as to develop a noninvasive device that can measure sleep stages in beef cattle. In this regard: 1) The aim is to validate a noninvasive device (accelerometer) that can measure sleep stages in beef cattle, and how it relates to immune function, health, and productivity. Our hypothesis is that cattle presenting improved sleep quality are more efficient in terms of productivity, which can improve animal health and welfare. Identifying the most productive and efficient animals based on sleep quality may generate significant gains in performance and beef production and reduce environmental impacts. (AU)

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