Circadian rhythm of salivary cortisol secretion in female zoo-kept African elephants (Loxodonta africana)
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Salivary samples were collected over a 24-hr period from one group of six juvenile (7-12 years) and one group of three adult (24-25 years) African elephant females, Loxodonta africana, and the cortisol concentration was measured in unextracted samples by EIA. ... ...
