Adrenocorticol responsiveness to immobilization stress in spotted hyenas (Crocuta crocuta) |
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| Affiliation: | 1. Graduate School of Science, Faculty of Science, Kyoto University, Kyoto, Japan;2. Department of Biology, University of Konstanz, Konstanz, Germany;3. Department of Collective Behaviour, Max Planck Institute of Animal Behaviour, Konstanz, Germany;4. Center for the Advanced Study of Collective Behaviour, University of Konstanz, Konstanz, Germany |
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| Abstract: | - 1.1. The adrenocortical responsiveness to an induced Stressor was monitored in free-living spotted hyenas belonging to a number of social and reproductive categories.
- 2.2. No significant differences between sexes, or changes in mean cortisol concentrations during serial sampling within the sexes, could be demonstrated.
- 3.3. The extreme individual variance in temporal cortisol profiles recorded in this study is inexplicable, as it was not related to differences in immobilization procedure, sex, age, reproductive or social category.
- 4.4. Females, which are the dominant sex in this species, generally showed larger percentage increases in cortisol concentrations during serial sampling.
- 5.5. Significant correlations between initial cortisol concentrations, as well as cortisol responsiveness and androgen concentrations, in a number of social and reproductive categories, suggest that these categories do not provide sufficient resolution for the identification of specific dominance-related trends.
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