Changes in skin temperature and behaviors of preweaning Holstein calves in a hot environment monitored by a multimodal tail-attached device

Autor: Eri Furukawa, Tomomi Ozawa, Shogo Higaki, Tomoko Suda, Yosuke Sasaki, Kyotaro Murayama, Michiko Noguchi, Koji Yoshioka
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: JDS Communications, Vol 5, Iss 4, Pp 332-337 (2024)
Druh dokumentu: article
ISSN: 2666-9102
93369425
DOI: 10.3168/jdsc.2023-0515
Popis: This study aimed to determine the applicability of a tail-attached device in monitoring animal-based indicators (ABI) associated with changes in environmental conditions in calves through investigating the relationship between sensor-derived ABI and the temperature-humidity index (THI). Furthermore, to identify effective ABI indicative of heat stress status, sensor-derived ABI of calves under differing heat stress levels based on rectal temperature (RT) were compared. The tail-attached device, which is capable of measuring skin temperature (ST), activity intensity, and roll angle along the longitudinal axis of the tail at 3-min intervals, was attached to 99 preweaning female Holstein calves for an average of 4 wk (26.4 ± 6.8 d). After selecting data from mild to hot days (daily average THI of ≥55), physiological (daily maximum tail ST) and behavioral (daily average activity intensity, daily total lying time, and daily total body position change) ABI were computed, and their relationship with the daily average THI was determined using piecewise regression analysis. Additionally, during the hot season, RT of 20 randomly selected tested calves were measured thrice a week (every 2.4 ± 0.5 d), and a comparison was conducted between the ABI of calves with normal RT (
Databáze: Directory of Open Access Journals