A Reliable Procedure for Measuring Cortisol Levels in Rhesus Macaque Hair Samples

January 2009

Chunlu Li, Dongdong Qin, Xiaoli Feng, Bo Zhang, Shangchuan Yang, Xintian Hu, Yuanye Ma

TLDR The procedure reliably measures cortisol in rhesus macaque hair.

The study developed a reliable procedure for measuring cortisol levels in rhesus macaque hair samples, using liquid nitrogen to deep freeze and powder the samples. It involved 3 treatment groups: a blank group (n=3), an old tube group (n=10), and a new tube group (n=10). The results showed no significant difference between old and new tubes, and a high correlation between repeated measures of the same individuals (r=0.893, P=0.000). Additionally, hair cortisol concentrations were moderately correlated with the number of received intense aggressions (r=0.591, P=0.008), confirming the procedure's reliability.

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