干旱区生态环境知识资源中心(Arid): Thermoregulatory responses, and acid-base and electrolytic balance of indigenous ewes of different coat colour in an equatorial semi-arid region

Arid

DOI	10.1071/AN20321
	Thermoregulatory responses, and acid-base and electrolytic balance of indigenous ewes of different coat colour in an equatorial semi-arid region
	Evangelista Facanha, Debora Andrea; Ferreira, Josiel; Freitas Silveira, Robson Mateus; Morais, Fabricio Xavier; de Medeiros, Chromacio Calafange; Faco, Olivardo; Rufino de Sousa, Jose Ernandes; de Paula, Valeria Veras
通讯作者	Silveira, RMF (corresponding author), Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Anim Sci, BR-13418900 Piracicaba, SP, Brazil.
来源期刊	ANIMAL PRODUCTION SCIENCE
ISSN	1836-0939
EISSN	1836-5787
出版年	2022
英文摘要	Context Animal husbandry in thermally stressful environments can be both complex and difficult, and the anticipated effects of climate change are expected to increase this condition. Aim Thermoregulatory responses, and acid-base and electrolytic balance were evaluated in indigenous ewes of different coat colour during different moments of natural heat stress. Methods Fifteen ewes of different colour (white, red and black; five of each) were used and data were collected for six consecutive weeks in the dry and rainy periods at three times of the day [(Moment 1) 0500 hours to 0600 hours; (Moment 2) 1200 hours to 1300 hours; and (Moment 3) 1700 hours to 1800 hours)]. Thermoregulatory (clinical measures), acid-base and electrolytic variables (blood examinations) were recorded. Air temperature and relative humidity were measured, and the radiant heat load was calculated. Key results Black ewes showed higher averages of respiratory rate (RR) and rectal temperature (RT). RT was different between before and after heat stress for all ewes, while the RR was not affected and cutaneous evaporation presented minor variations. Between 1200 hours and 1300 hours, there was an increase in the hydrogen potential, oxygen pressure, oxygen saturation and total carbon concentration averages, and a decrease in partial pressure of carbon dioxide for all ewes. The base excess was not significantly different for each time of the day between the periods, and were not affected by the time of the day or the season. White ewes were highly affected by the time of the day and the period regarding electrolytic parameters, followed by the red ewes and black ewes. The first two discriminant functions showed that ewes, regardless of coat colour, show similarity in the animal responses at Moments 1 and 3, compared with Moment 2. RT was the main variable that distinguished the three genetic groups. Conclusions Indigenous ewes of different coat colour recover physiological equilibrium after heat challenges. These adjustments enable them to maintain thermoregulatory responses, and acid-base and electrolytic balance within the physiological equilibrium. Implications These variations indicated the ability of Brazilian indigenous ewes of different coat colour to recover thermoregulatory, and acid-base and electrolytic balance after an environmentally challenging condition in an equatorial semi-arid region, regardless of the period.
英文关键词	adaptation blood gases heat stress Morada Nova ewes multivariate analysis semi-arid environment thermal biology
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000710422600001
WOS关键词	ADAPTED BRAZILIAN SHEEP ; ADAPTATION ; GOATS ; TEMPERATURE ; STRESS
WOS类目	Agriculture, Dairy & Animal Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367617
作者单位	[Evangelista Facanha, Debora Andrea; Ferreira, Josiel; Morais, Fabricio Xavier; de Medeiros, Chromacio Calafange; Rufino de Sousa, Jose Ernandes; de Paula, Valeria Veras] Fed Rural Univ Semiarid Reg UFERSA, Dept Anim Sci, BR-59625900 Mossoro, RN, Brazil; [Freitas Silveira, Robson Mateus] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Anim Sci, BR-13418900 Piracicaba, SP, Brazil; [Faco, Olivardo] Embrapa Caprinos & Ovinos, BR-62010970 Sobral, CE, Brazil
推荐引用方式 GB/T 7714	Evangelista Facanha, Debora Andrea,Ferreira, Josiel,Freitas Silveira, Robson Mateus,et al. Thermoregulatory responses, and acid-base and electrolytic balance of indigenous ewes of different coat colour in an equatorial semi-arid region[J],2022.
APA	Evangelista Facanha, Debora Andrea.,Ferreira, Josiel.,Freitas Silveira, Robson Mateus.,Morais, Fabricio Xavier.,de Medeiros, Chromacio Calafange.,...&de Paula, Valeria Veras.(2022).Thermoregulatory responses, and acid-base and electrolytic balance of indigenous ewes of different coat colour in an equatorial semi-arid region.ANIMAL PRODUCTION SCIENCE.
MLA	Evangelista Facanha, Debora Andrea,et al."Thermoregulatory responses, and acid-base and electrolytic balance of indigenous ewes of different coat colour in an equatorial semi-arid region".ANIMAL PRODUCTION SCIENCE (2022).