has significantly contributed to the monitoring of health, welfare and management of
animals. Immunoreactive cortisol in hair (hC) has been used widely for deciphering
'stressful'past-events in various wild and captive animals. However, no such studies have
been done in long-lived mammals. Methods In this first exploratory study in elephants, we
assessed (i) tail-hair growth rate (TGR) and (ii) hC levels in tail-hair samples from six captive …