干旱区生态环境知识资源中心(Arid): Neonatal mortality of lambs in production systems in a semi-arid environment: main risk factors

Arid

DOI	10.1017/S0021859623000291
	Neonatal mortality of lambs in production systems in a semi-arid environment: main risk factors
	dos Santos, J. D. C.; Saraiva, E. P.; Pimenta Filho, E. C.; Neta, G. C. X.; Morais, L. K. C.; Teti, H. S.; Fidelis, S. S.
通讯作者	Saraiva, EP
来源期刊	JOURNAL OF AGRICULTURAL SCIENCE
ISSN	0021-8596
EISSN	1469-5146
出版年	2023
卷号	161 期号:3 页码:438-449
英文摘要	The sheep farming has economic and sociocultural importance in semi-arid regions worldwide. Of the total of 1.2 billion sheep in the world, 0.4 are found in semi-arid regions. In this review, we have discussed the main risk factors for neonatal lamb mortality and its association with the prevailing environmental conditions of tropical semi-arid regions. Over the last decades, the average mortality rate of newborn lambs remained relatively constant (similar to 15%) around the world. This rate is reported to be higher (Up to 30%) in small-scale sheep farming systems from developing countries. Overall, the main risk factors of neonatal mortality include low birth weight, dystocia, adverse weather conditions, inadequate milk, or colostrum supply, competition between siblings in multiple births, and poor expression of maternal behaviour. In tropical semi-arid regions, recent findings revealed that newborn lambs from hair coat sheep breeds are less vigorous to perform the first suckling when even exposed to moderate cold conditions (18-20 degrees C). On the other hand, the high radiant heat load in these areas can also challenge the thermoregulation of ewes and newborn lambs, especially if they are kept in areas without protection against direct short-wave solar radiation. Under such circumstances, newborn lambs were reported to be hyperthermic. The heat stress as risk factor for neonatal lamb mortality is a topic that deserves more investigation, particularly in tropical semi-arid areas, where is expected to be drier and hotter as consequence of rapid advances in climate change.
英文关键词	Homoeothermy heat stress newborn lambs radiant thermal environment tropical areas
类型	Review
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:001021328400001
WOS关键词	BIRTH-WEIGHT ; SHEEP PRODUCTION ; THERMOREGULATORY RESPONSES ; RADIATIVE PROPERTIES ; DIVERSE GENOTYPES ; IODINE DEFICIENCY ; BODY-TEMPERATURE ; METABOLIC-RATE ; HOLSTEIN COWS ; EWE FERTILITY
WOS类目	Agriculture, Multidisciplinary
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/2XILL650/397107
推荐引用方式 GB/T 7714	dos Santos, J. D. C.,Saraiva, E. P.,Pimenta Filho, E. C.,et al. Neonatal mortality of lambs in production systems in a semi-arid environment: main risk factors[J],2023,161(3):438-449.
APA	dos Santos, J. D. C..,Saraiva, E. P..,Pimenta Filho, E. C..,Neta, G. C. X..,Morais, L. K. C..,...&Fidelis, S. S..(2023).Neonatal mortality of lambs in production systems in a semi-arid environment: main risk factors.JOURNAL OF AGRICULTURAL SCIENCE,161(3),438-449.
MLA	dos Santos, J. D. C.,et al."Neonatal mortality of lambs in production systems in a semi-arid environment: main risk factors".JOURNAL OF AGRICULTURAL SCIENCE 161.3(2023):438-449.