The welfare risks and impacts of heat stress on sheep shipped from Australia to the Middle East

Phillips, Clive (2016) The welfare risks and impacts of heat stress on sheep shipped from Australia to the Middle East. Veterinary Journal, 218 78-85. doi:10.1016/j.tvjl.2016.09.011

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Author Phillips, Clive
Title The welfare risks and impacts of heat stress on sheep shipped from Australia to the Middle East
Journal name Veterinary Journal   Check publisher's open access policy
ISSN 1532-2971
1090-0233
Publication date 2016-12-01
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1016/j.tvjl.2016.09.011
Open Access Status File (Author Post-print)
Volume 218
Start page 78
End page 85
Total pages 8
Place of publication London, United Kingdom
Publisher Elsevier
Collection year 2017
Language eng
Abstract This review considers the welfare issues confronting sheep due to heat stress on board ships undertaking long distance voyages. Sheep engage in behavioural and physiologic mechanisms to attempt to mitigate heat stress, but the evidence from Australian shipments from 2005 to 2014 is that mortality approximately doubles when sheep are transported from Australia in winter to the Middle East in summer. Much of this increase has been attributed to salmonellosis and inanition, but this may have been mistaken for, or exacerbated by, heat stress. The Australian government's estimate of the heat stress threshold of sheep is substantially higher than that observed under simulated live export conditions, which leads to an underestimate of the importance of heat stress in sheep on voyages where mortality is high. Improved temperature monitoring on ships and the creation of both a robust model of the impact of increased temperatures on sheep morbidity and mortality, and a heat stress scale for sheep would assist in understanding and addressing this welfare concern. The high risk to sheep exported from Australia during summer in the Middle East is sufficient to warrant consideration of restriction of trade during this period.
Keyword Animal welfare
Heat stress
Live export
Sheep
Ship
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collections: HERDC Pre-Audit
School of Veterinary Science Publications
 
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