Non-Invasive Assessment of Physiological Stress in Captive Asian Elephants

Abstract

Simple SummaryFecal glucocorticoid metabolite (fGCM) concentrations were examined in captive Asian elephants in relation to sex, body condition score, and working conditions. A total of 870 samples from 37 elephants in four elephant facilities were collected. We used a cortisol enzyme immunoassay for quantification of fGCM concentrations in fecal samples. Mean fGCM varied significantly across elephant facilities. Female elephants born in the wild exhibited elevated fGCM concentrations across all the facilities compared to males and captive-born elephants.Asian elephant (Elephas maximus) populations, both in the wild and in captivity, have been continually declining over the decades. The present study examined the physiological stress response of captive Asian elephants in relation to body condition score and different working conditions. A total of 870 dung samples of 37 captive elephants (24 males and 13 females) from four facilities were collected to examine fecal glucocorticoid metabolite concentrations (fGCM). The elephants in forest camps with exposure to natural habitats had a higher body condition score than those in more confined spaces. Wild born elephants and females (except in one case) had higher concentrations of fGCM than captive born elephants and males, respectively. Elephants engaged in the Dussehra festival had elevated fGCM concentrations than their counterparts at Mysore zoo. We recommend a few management practices for the long-term survival of rapidly declining captive elephant populations.