Monitoring the effects of land transformation on African clawless otters (Aonyx capensis) using fecal glucocorticoid metabolite concentrations as a measure of stress.
African clawless otter
fecal glucocorticoid metabolites
non-invasive hormone measurement
stress
urbanization
Journal
Integrative zoology
ISSN: 1749-4877
Titre abrégé: Integr Zool
Pays: Australia
ID NLM: 101492420
Informations de publication
Date de publication:
Jul 2020
Jul 2020
Historique:
pubmed:
9
1
2020
medline:
10
9
2020
entrez:
9
1
2020
Statut:
ppublish
Résumé
In a time of increasing environmental change caused by anthropogenic disturbance, there is a greater need to understand animal adaptations to manmade environments. In this regard, the measurement of stress-related endocrine markers provides a useful tool to examine the impact of environmental challenges and the physiological consequences for wildlife occupying such space. The aims of the present study were to validate fecal glucocorticoid metabolite (fGCM) concentrations as a measure of stress using samples from a male African clawless otter (Aonyx capensis; n = 1) and to compare fGCM concentrations of otters occurring in a transformed and in 2 natural areas in South Africa. From the 5 different enzyme-immunoassays (EIA) tested, a cortisol and oxoetiocholanolone (measuring 11,17 dioxoandrostanes) EIA revealed the highest response (74% and 48% increase, respectively) 30 and 24 hours after a stress event (translocation of a captive individual as part of its rehabilitation prior to release), respectively. For both EIAs, fGCM concentrations were comparable for samples collected up to 3 h post-defecation. Using the cortisol EIA for subsequent analyses, fGCM concentrations of animals from the transformed area (n = 20; mean [± SD]: 0.468 [± 0.539] µg/g dry weight [DW]) were significantly higher (P = 0.013) than those from otters in the natural areas (n = 17; 0.242 [± 0.226] µg/g DW). These preliminary results suggest that African clawless otters may have increased adrenocortical activity that could be due to conditions linked to living in a transformed environment.
Identifiants
pubmed: 31912606
doi: 10.1111/1749-4877.12428
doi:
Substances chimiques
Glucocorticoids
0
Hydrocortisone
WI4X0X7BPJ
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
293-306Informations de copyright
© 2020 International Society of Zoological Sciences, Institute of Zoology/Chinese Academy of Sciences and John Wiley & Sons Australia, Ltd.
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