Mean ± standard error (SE) of serum cortisol (ng/ml) across periods of renovation in the elephant house.

aOnly one serum collection occurred during renovations. *Value is outside of the 95% confidence interval (CI) for the baseline value. Mean ± standard error (SE) of serum cortisol (ng/ml) across periods of renovation in the elephant house.装修期间仅完成一次血清样本采集。 * 该值超出基线值的95%置信区间（Confidence Interval, CI）。 象舍装修各阶段血清皮质醇（serum cortisol，ng/ml）的平均值±标准误（Standard Error, SE）。