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    Absence of a causal relationship between environmental and body temperature in dairy cows (Bos taurus) under moderate climatic conditions

    Verwoerd, Wynand; Wellby, Martin; Barrell, Graham
    Abstract
    (1). Continuous body temperature records from dairy cows for 46 days of summer and contemporary data for climate temperature humidity index (THI) were analysed. (2). A large component of the body temperature data was not explained by changes in THI. (3). Outside a normal range of values (above 72 for THI and 39.05 °C for body temperature), there was evidence of a causal relationship with a time delay of about 120 minutes. (4). Both variables had a prominent circadian component, but these were more likely to be due to common and/or independent causes than to any direct relationship.
    Keywords
    development; circadian rhythm; core temperature; dairy cows; heat stress; climate; temperature rhythm
    Date
    2006
    Type
    Journal Article
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    • Department of Wine, Food and Molecular Biosciences [761]
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    DOI
    https://doi.org/10.1016/j.jtherbio.2006.07.001
    Metadata
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    Copyright © 2006 Elsevier Ltd All rights reserved.
    Citation
    Verwoerd, W., Wellby, M., & Barrell, G. (2006). Absence of a causal relationship between environmental and body temperature in dairy cows (Bos taurus) under moderate climatic conditions. Journal of Thermal Biology, 31(7), 533-540.
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