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Hormonal and behavioural stress responses to capture and radio-collar fitting in free-ranging pampas deer (Ozotoceros bezoarticus)

Published online by Cambridge University Press:  01 January 2023

MS Munerato ,
JA Marques ,
NA Caulkett ,
WM Tomás ,
ES Zanetti ,
RG Trovati ,
GT Pereira  and
R Palme
MS Munerato*
Affiliation:
Department of Clinical and Veterinary Surgery, Faculty of Agrarian and Veterinary Sciences, São Paulo State University (FCAV-UNESP), Via de Acesso Professor Paulo Donato Castellane s/n, Jaboticabal - SP, 14884-900, Brazil
JA Marques
Affiliation:
Department of Clinical and Veterinary Surgery, Faculty of Agrarian and Veterinary Sciences, São Paulo State University (FCAV-UNESP), Via de Acesso Professor Paulo Donato Castellane s/n, Jaboticabal - SP, 14884-900, Brazil
NA Caulkett
Affiliation:
Department of Clinical and Diagnostic Sciences, Faculty of Veterinary Medicine, University of Calgary HM 383, 3330 Hospital Drive, North-West Calgary T2N 4N1, Canada
WM Tomás
Affiliation:
Wildlife Laboratory, Brazilian Agricultural Research Corporation (Embrapa Pantanal), CP 109, Corumbá, MS, 79320-900, Brazil
ES Zanetti
Affiliation:
FCAV-UNESP, Deer research and Conservation Center (NUPECCE)
RG Trovati
Affiliation:
Department of Ecology, ‘Luiz de Queiroz’ College of Agriculture (ESALQ-USP), Av Pádua Dias, 11, Piracicaba - SP, 13418-900, Brazil
GT Pereira
Affiliation:
Department of Exact Sciences, FCAV-UNESP, Via de Acesso Professor Paulo Donato Castellane s/n, Jaboticabal - SP, 14884-900, Brazil
R Palme
Affiliation:
Department of Biomedical Sciences/Unit of Physiology, Pathophysiology and Experimental Endocrinology, University of Veterinary Medicine (Vetmeduni), Veterinärplatz 1, A-1210 Vienna, Austria
*
* Contact for correspondence and requests for reprints: [email protected]
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Abstract

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This study evaluated the short-term hormonal and behavioural responses to capture and radio-collar fitting in free-ranging pampas deer (Ozotoceros bezoarticus). Twenty adult deer (eleven females and nine males) were captured in the South Pantanal wetland (Brazil) and equipped with VHF radio-collars (marked deer). Untreated adult deer of the same sex were randomly chosen as the control group (nine females and nine males). On the day following capture, an observer followed all deer for faecal collection and behaviour evaluation. Faecal samples were immediately refrigerated and frozen at-20°C within a maximum of 12 h. Faecal glucocorticoid metabolites (FGM) were measured using an 11-oxoaetiocholanolone enzyme immunoassay. A qualitative behaviour assessment and the consequences of capture were evaluated using pre-defined terminologies and scores. Flight distance was recorded using a range finder. FGM increased from 19-22 h after capture onwards and peak concentrations were five times (median) higher as the respective baseline values. FGM values of marked deer were significantly higher at 22-25 and 25-28 h compared with controls. Marked male but not female deer had significantly higher FGM values at 22-25 and 25-28 h compared with their baseline values. Marked deer were significantly more fearful, less sociable and defensive than controls. The absences of significant increases of FGM in the captured female deer may indicate that females are less prone to capture stress. The significantly more fearful, and less sociable and defensive patterns observed in marked deer may be relevant during capture of lactating females or in areas with high predator pressure.

Keywords

animal welfareenzyme immunoassayglucocorticoidspampas deerqualitative behaviour assessmentSouthern Pantanal wetland
Type
Research Article
Information
Animal Welfare , Volume 24 , Issue 4 , November 2015 , pp. 437 - 446
Copyright
© 2015 Universities Federation for Animal Welfare

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