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Cross-institutional assessment of stress responses in zoo animals using longitudinal monitoring of faecal corticoids and behaviour

Published online by Cambridge University Press:  11 January 2023

DJ Shepherdson ,
KC Carlstead  and
N Wielebnowski
DJ Shepherdson*
Affiliation:
Oregon Zoo, 4001 SW Canyon Road, Portland, Oregon 97221, USA
KC Carlstead
Affiliation:
Honolulu Zoo, 151 Kapahulu Avenue, Honolulu, Hawaii 96815, USA
N Wielebnowski
Affiliation:
BRookfield Zoo, 3300 Golf Road, BRookfield, Illinois 60513, USA
*
* Contact for correspondence and requests for reprints: shepherdsond@metro.dst.or.us
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Abstract

Cross-institutional studies that combine non-invasive physiological measures of stress responses and the assessment of individual differences in behaviour and temperament have great potential as tools for assessing the well-being of zoo animals and for identifying key environmental stimuli relevant to well-being. In addition, such studies allow comparison of animals under a wide variety of conditions and enable researchers to obtain sufficiently large samples sizes for statistical data analyses. Faecal corticoid measurements, a method recently developed to monitor adrenal activity in wildlife and domestic species, can be obtained non-invasively as part of the normal husbandry routine. While basic techniques still need improvement, and interpretation of the acquired measures can be challenging, assessment of faecal corticoid concentrations can provide a useful indicator of stress responses under a variety of captive conditions. Here we report on three studies that illustrate this approach and the results that can be obtained. An on-going study reveals significant differences in the pattern of variability of faecal corticoid concentrations between polar bears that are reported by keepers to perform stereotypic behaviour and those that do not. In another study, faecal corticoid measures indicated that stress responses to certain extraneous noises might interfere with the breeding of Hawaiian honeycreepers in captivity. In a study of clouded leopards, higher faecal corticoid concentrations were measured when cats were kept on public display or near potential predators compared to individuals maintained off exhibit or in the absence of visible predators. The findings of an on-going experimental study suggest a causal relationship between the provision of additional hiding spaces and a decline in faecal corticoid concentrations in clouded leopards.

Keywords

animal welfarecorticosteroidhousing and husbandrystereotypiesstresszoo
Type
Research Article
Information
Animal Welfare , Volume 13 , Issue S1: Science in the Service of Animal Welfare: Proceedings of the UFAW International Symposium, Edinburgh, 2-4 April 2003 , February 2004 , pp. S105 - S113
Copyright
© 2004 Universities Federation for Animal Welfare

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