1. The concentrations of 8 variables in the blood of impala and roan antelope exposed to acute stress were investigated. 2. An objective measure of the acute stress response, based on the % maximal change of the 8 variables, is suggested. 3. The method takes into account the species specificity of the stress response and is based on changes in the concentration of variables which reflect the (general) hormonal and (neuro-) endocrine balance of an animal at a given time. 4. The species-specific experimental response to stress (SSERTS), thus obtained, is time and procedure dependent.
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