Response to long-distance relocation in Asian elephants (Elephas maximus)

Monitoring adrenocortical activity via serum, urine, and feces

Kerry V. Fanson, Michael Lynch, Larry Vogelnest, Gary Miller, Tamara Keeley

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Understanding how elephants respond to potentially stressful events, such as relocation, is important for making informed management decisions. This study followed the relocation of eight Asian elephants from the Cocos (Keeling) Islands to mainland Australia. The first goal of this study was to examine patterns of adrenocortical activity as reflected in three different substrates: serum, urine, and feces. We found that the three substrates yielded very different signals of adrenocortical activity. Fecal glucocorticoid metabolites (FGM) increased as predicted post-transport, but urinary glucocorticoid metabolites (UGM) were actually lower following transport. Serum cortisol levels did not change significantly. We suggest that the differences in FGM and UGM may reflect changes in steroid biosynthesis, resulting in different primary glucocorticoids being produced at different stages of the stress response. Additional studies are needed to more thoroughly understand the signals of adrenocortical activity yielded by different substrates. The second goal was to examine individual variation in patterns of adrenal response. There was a positive correlation between baseline FGM value and duration of post-transfer increase in FGM concentration. Furthermore, an individual's adrenocortical response to relocation was correlated with behavioral traits of elephants. Elephants that were described by keepers as being "curious" exhibited a more prolonged increase in FGM post-transfer, and "reclusive" elephants had a greater increase in FGM values. Future research should investigate the importance of these personality types for the management and welfare of elephants.

Original languageEnglish
Pages (from-to)655-664
Number of pages10
JournalEuropean Journal of Wildlife Research
Volume59
Issue number5
DOIs
Publication statusPublished - Oct 2013

Keywords

  • Cortisol
  • Glucocorticoids
  • Individual variation
  • Noninvasive
  • Transfer
  • Transport

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