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• W2598269737 endingPage "163" @default.
• W2598269737 startingPage "153" @default.
• W2598269737 abstract "Activation of the hypothalamic–pituitary–adrenal (HPA) axis liberates glucocorticoids, which provides an acute indication of an individual’s response to stressors. The heritability of the stress response in wild mammals, however, remains poorly documented. We quantified the cortisol stress response of female Richardson’s ground squirrels (RGSs) to handling and physical restraint, testing for: (1) the effects of individual age, time of day, and sample latency; (2) repeatability within individuals; (3) narrow-sense heritability; and (4) differences among individuals owing to potential genetic and/or environmental effects. We detected a positive linear relationship between baseline plasma cortisol (BL-cortisol) concentration and stress-induced plasma cortisol (SI-cortisol) concentration that defined each individual’s cortisol stress response. BL-cortisol, SI-cortisol, and stress response did not differ according to the time the sample was taken, or by subject age. Cortisol stress response was highly repeatable within individuals, had a mother–offspring heritability of h2 = 0.40 ± 0.24 (mean ± SE), full-sibling heritability of hFS2 = 0.37 ± 0.71⁠, and half-sibling heritability of hHS2= 0.75 ± 1.41⁠. Stress responses of sibling groups, immediate-family groups, and squirrels within a given area did not differ, whereas those of individuals from more distantly related matrilines did. Our results highlight the natural variability in HPA axis reactivity among individuals by quantifying both BL- and SI-cortisol levels, demonstrate partial heritability of the stress response that is not attributable to environmental variation, and suggest that at least part of an individual’s stress response can be accounted for by differences in matrilineal history." @default.
• W2598269737 created "2017-04-07" @default.
• W2598269737 creator A5010051134 @default.
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• W2598269737 creator A5069098908 @default.
• W2598269737 creator A5071208935 @default.
• W2598269737 creator A5090206416 @default.
• W2598269737 date "2017-03-23" @default.
• W2598269737 modified "2023-10-18" @default.
• W2598269737 title "Like mother, like daughter: heritability of female Richardson’s ground squirrel Urocitellus richardsonii cortisol stress responses" @default.
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• W2598269737 doi "https://doi.org/10.1093/cz/zox014" @default.
• W2598269737 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5905375" @default.
• W2598269737 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30402055" @default.

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