caa a22 4500 605513899 CHVBK 20210128100702.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00360-014-0866-4 doi (NATIONALLICENCE)springer-10.1007/s00360-014-0866-4 Sex differences in the long-term repeatability of the acute stress response in long-lived, free-living Florida scrub-jays ( Aphelocoma coerulescens ) [Elektronische Daten] [Thomas Small, Stephan Schoech] There is increasing evidence that individual differences in the physiological stress response are persistent traits in many animals. To test the hypothesis that the stress-induced CORT (SI-CORT) response is repeatable over the adult life span of Florida scrub-jays (Aphelocoma coerulescens), we sampled 32 male and 25 female free-living scrub-jays (aged 2-13years) during a 9-year period (2004-2012). Each individual was sampled two to five times and samples were collected one or more years apart during the pre-breeding season (Jan-March). In addition, individuals sampled over the greatest time period (6-8years) were analyzed separately to more closely assess long-term repeatability. SI-CORT was repeatable in females, but not males, when values were not corrected for confounding variables (agreement repeatability). However, when the year and time of day of sample collection were controlled (adjusted repeatability), SI-CORT was repeatable in both sexes. SI-CORT was also repeatable in the males and females sampled 6-8years apart. Finally, baseline CORT levels of males, but not females, exhibited low but significant repeatability when adjusted for year. The results of this study demonstrate that differences in SI-CORT levels were repeatable within adult scrub-jays sampled up to 8years apart. Further, the female SI-CORT response was more consistent between pre-breeding seasons than males, which may have resulted from males having higher SI-CORT plasticity in response to environmental conditions. These data support the hypothesis that the SI-CORT response of Florida scrub-jays develops before adulthood and persists throughout much, if not all, of their natural adult life span. Springer-Verlag Berlin Heidelberg, 2014 Glucocorticoids nationallicence Stress response nationallicence Repeatability nationallicence Plasticity nationallicence Florida scrub-jay nationallicence Personality nationallicence Small Thomas Department of Biological Sciences, University of Memphis, 3774 Walker Ave, 38152, Memphis, TN, USA aut Schoech Stephan Department of Biological Sciences, University of Memphis, 3774 Walker Ave, 38152, Memphis, TN, USA aut Journal of Comparative Physiology B Springer Berlin Heidelberg 185/1(2015-01-01), 119-133 0174-1578 185:1<119 2015 185 360 https://doi.org/10.1007/s00360-014-0866-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00360-014-0866-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Small Thomas Department of Biological Sciences, University of Memphis, 3774 Walker Ave, 38152, Memphis, TN, USA aut NATIONALLICENCE 700 1- Schoech Stephan Department of Biological Sciences, University of Memphis, 3774 Walker Ave, 38152, Memphis, TN, USA aut NATIONALLICENCE 773 0- Journal of Comparative Physiology B Springer Berlin Heidelberg 185/1(2015-01-01), 119-133 0174-1578 185:1<119 2015 185 360