ArticleProceedings. Biological sciences2013
Do smart birds stress less? An interspecific relationship between brain size and corticosterone levels.
Article in Proceedings. Biological sciences, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
11 citing papers in PubMed.
- Among-species variation in hormone concentrations is associated with urban tolerance in birds.Proceedings. Biological sciences · 2022Article
- Optimal hormonal regulation when stressor cues are imperfect.Hormones and behavior · 2022Article
- Problems with using comparative analyses of avian brain size to test hypotheses of cognitive evolution.PloS one · 2022Article
- Play behaviour, not tool using, relates to brain mass in a sample of birds.Scientific reports · 2020Article
- Stress-induced changes in color expression mediated by iridophores in a polymorphic lizard.Ecology and evolution · 2017Article
- Longevity is associated with relative brain size in birds.Ecology and evolution · 2017Article
- Loner or socializer? Ravens' adrenocortical response to individual separation depends on social integration.Hormones and behavior · 2016Article
- Weathering the storm: parental effort and experimental manipulation of stress hormones predict brood survival.BMC evolutionary biology · 2015Article
- Food supplementation fails to reveal a trade-off between incubation and self-maintenance in female house wrens.PloS one · 2014Article
- Measures of physiological stress: a transparent or opaque window into the status, management and conservation of species?Conservation physiology · 2014Article
- Experimental food restriction reveals individual differences in corticosterone reaction norms with no oxidative costs.PloS one · 2014Article
Corrections and comments
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Vertebrates respond to unpredictable noxious environmental stimuli by increasing secretion of glucocorticoids (CORT). Although this hormonal stress response is adaptive, high levels of CORT may induce significant costs if stressful situations are frequent. Thus, alternative coping mechanisms that help buffer individuals against environmental stressors may be selected for when the costs of CORT levels are elevated. By allowing individuals to identify, anticipate and cope with the stressful circumstances, cognition may enable stress-specific behavioural coping. Although there is evidence that behavioural responses allow animals to cope with stressful situations, it is unclear whether or not cognition reduces investment in the neuroendocrine stress response. Here, we report that in birds, species with larger brains relative to their body size show lower baseline and peak CORT levels than species with smaller brains. This relationship is consistent across life-history stages, and cannot be accounted for by differences in life history and geographical latitude. Because a large brain is a major feature of birds that base their lifetime in learning new things, our results support the hypothesis that enhanced cognition represents a general alternative to the neuroendocrine stress response.
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