Journal of Veterinary Medical Science
Online ISSN : 1347-7439
Print ISSN : 0916-7250
ISSN-L : 0916-7250
Physiology
Evaluation of heat stress response in crossbred dairy cows under tropical climate by analysis of heart rate variability
Chan BUNYouki WATANABEYoshihisa UENOYAMANaoko INOUENahoko IEDAFuko MATSUDAHiroko TSUKAMURAMasayoshi KUWAHARAKei-ichiro MAEDASatoshi OHKURAVutha PHENG
Author information
JOURNALS FREE ACCESS

2018 Volume 80 Issue 1 Pages 181-185

Details
Abstract

The present study aims to examine the effect of tropical temperatures on autonomic nervous activity in Cambodian dairy cattle by analyzing heart rate variability (HRV). Holter-type electrocardiograms were recorded in adult crossbred cows (Cambodian native × Holstein) either in a sheltered area or under direct sunlight. Rectal temperatures and heart rates increased in animals under direct sunlight as compared to those in the shelter. The power spectral analysis of HRV revealed that three out of the five cows studied underwent a decrease in parasympathetic nervous activity under direct sunlight with the remaining two cows showing no apparent change. The HRV analysis would prove to be a useful tool to reveal information about heat tolerance in dairy cows.

Information related to the author

この記事はクリエイティブ・コモンズ [表示 - 非営利 - 改変禁止 4.0 国際]ライセンスの下に提供されています。
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.ja
Previous article Next article
feedback
Top