干旱区生态环境知识资源中心(Arid): Understanding the environmental stress on thermoregulation actions of native goats using broken-line regression

Arid

DOI	10.1007/s00484-023-02476-6
	Understanding the environmental stress on thermoregulation actions of native goats using broken-line regression
	Ferreira, Josiel; Freitas Silveira, Robson Mateus; Evangelista Facanha, Debora Andrea; McManus, Concepta Margaret
通讯作者	Ferreira, J
来源期刊	INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
ISSN	0020-7128
EISSN	1432-1254
出版年	2023
卷号	67 期号:6 页码:1031-1037
英文摘要	This study's objective was to evaluate the thermoregulation aspects of native goats through broken-line regression to understand the triggering of physiological responses in the homeothermy process. Data were collected from ten healthy dams of the Caninde breed once a week at hourly intervals (24 h) for eight consecutive weeks. Air temperature (AT; degrees C), relative humidity (RH; %) were measured and temperature-humidity index (THI) calculated. The thermoregulation parameters evaluated were: respiratory rate (RR; breaths.min(-1)), rectal temperature (RT; degrees C) and sweating rate (SR; g.m(-2).h(-1)). All variables were subjected to analysis of variance with repeated measures over time. The hour was considered a fixed effect (00:00 h, 01:00 h, horizontal ellipsis , 23:00 h), and the animal was a random effect. Multiple regression analyses were also examined using General Linear Models and Variance Inflation Factors were calculated. Broken line non-linear regressions for RR, RT and SR were examined using independent variables. The highest average for AT and RH were 35.9 degrees C (13:00 h) and 92.4% (04:00 h), respectively. The lowest average of TA and RH were 22.1 degrees C (05:00 h) and 28.0% (12:00 h), respectively. The highest average THI was 102.1 (13:00 h), and the lowest 78.0 (05:00 h). The environmental thresholds at which RR, RT and SR began to increase for AT were between 17-21 degrees C and RH were > 17% (RR), >= 21 (RT) and > 23% (SR). For THI the limits were 108.4 for RR, 78.0 for RT and 100.1 for SR. Using THI, the thermoregulatory parameters are activated in the following order: SR, RR and RT. Estimates can serve as a basis to implement heat stress mitigation and improve animal welfare strategies for native goats.
英文关键词	Adaptation Semi-arid region Caninde goats Daily rhythmicity Heat stress
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000972493400001
WOS关键词	RESPONSES ; SHEEP
WOS类目	Biophysics ; Environmental Sciences ; Meteorology & Atmospheric Sciences ; Physiology
WOS研究方向	Biophysics ; Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Physiology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396963
推荐引用方式 GB/T 7714	Ferreira, Josiel,Freitas Silveira, Robson Mateus,Evangelista Facanha, Debora Andrea,et al. Understanding the environmental stress on thermoregulation actions of native goats using broken-line regression[J],2023,67(6):1031-1037.
APA	Ferreira, Josiel,Freitas Silveira, Robson Mateus,Evangelista Facanha, Debora Andrea,&McManus, Concepta Margaret.(2023).Understanding the environmental stress on thermoregulation actions of native goats using broken-line regression.INTERNATIONAL JOURNAL OF BIOMETEOROLOGY,67(6),1031-1037.
MLA	Ferreira, Josiel,et al."Understanding the environmental stress on thermoregulation actions of native goats using broken-line regression".INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 67.6(2023):1031-1037.