Surface temperature elevated by chronic and intermittent stress

Herborn, K. A., Jerem, P. , Nager, R. G. , McKeegan, D. E.F. and McCafferty, D. J. (2018) Surface temperature elevated by chronic and intermittent stress. Physiology and Behavior, 191, pp. 47-55. (doi: 10.1016/j.physbeh.2018.04.004) (PMID:29630961) (PMCID:PMC5945995)

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Stress in homeothermic animals is associated with raised body core temperature and altered patterns of peripheral blood flow. During acute stress, peripheral vasoconstriction causes a short-lived drop in surface temperature that can be detected non-invasively using infrared thermography (IRT). Whether and how skin temperature changes under chronic stress, and hence the potential of IRT in chronic stress detection, is unknown. We explored the impact of withdrawing environmental enrichments and intermittent routine handling on long-term skin temperature in laying hens (Gallus gallus domesticus). Immediately following enrichment withdrawal, comb, face and eye temperature dropped, suggesting this was acutely stressful. In the 3 weeks that followed, barren-housed hens displayed behavioural markers of frustration. Whilst control birds, housed in enriched conditions, showed a decline over weeks in both comb temperature and baseline corticosterone levels, barren-housed hens had no change in comb temperature and an increase in corticosterone. By the trial end, comb temperature (but not corticosterone) was significantly higher in barren-housed hens. This change in parameters over time may reflect cumulative impacts of enrichment withdrawal in barren pens and/or, as hens were young and maturing, age-related changes in controls. Comb, face and eye temperature were also higher on days following routine handling, and comb temperature higher on other days in hens that were regularly handled for blood sampling than for a less intensive weighing protocol. Together, these data support comb, face and eye surface temperature increase as a long-term marker of stress exposure in laying hens. It is important to recognise that the strength and even direction of these effects may vary with thermoregulatory and energetic context. However, in laboratory and indoor-reared farm animals that live in carefully managed environments, IRT of the skin can potentially be used to non-invasively monitor chronic and intermittent stress exposure.

Item Type:Articles
Glasgow Author(s) Enlighten ID:McCafferty, Dr Dominic and Jerem, Mr Paul and McKeegan, Dr Dorothy and Herborn, Dr Katherine and Nager, Dr Ruedi
Authors: Herborn, K. A., Jerem, P., Nager, R. G., McKeegan, D. E.F., and McCafferty, D. J.
College/School:College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine
Journal Name:Physiology and Behavior
ISSN (Online):0031-9384
Published Online:06 April 2018
Copyright Holders:Copyright © 2018 The Authors
First Published:First published in Physiology and Behavior 191:47-55
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
599051Thermography as a tool for the assessment of stress and affective states in an avian modelDorothy McKeeganBiotechnology and Biological Sciences Research Council (BBSRC)BB/K002775/1RI BIODIVERSITY ANIMAL HEALTH & COMPMED