November 2023 in “Journal of animal science/Journal of animal science ... and ASAS reference compendium” In this study, researchers examined the genetic factors impacting cortisol and DHEA concentrations in the hair of healthy pigs; they found that cortisol levels were heritable and genetically correlated with behavioral stress responses, suggesting these hormones could potentially serve as indicators for selecting disease-resilient pigs.
5 citations
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January 2010 in “The anatomical record” This study assessed hair whorl characteristics in domestic dogs and found that simple whorls predominate, with tufted whorls more common in specific regions like elbows and chests, influenced by factors such as coat traits and source.
This study found no differences in psychopathic traits between women with and without polycystic ovary syndrome, challenging the proposed link between testosterone levels and psychopathy.
15 citations
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December 2021 in “Nature Communications” In studying wild meerkats, researchers observed that matriarchs with high androgen levels during late gestation exhibited increased dominance and aggression, affecting both their behavior and their offspring's aggression.
This study found that social hair plucking in captive rhesus macaques may share traits with both prosocial and aggressive behaviors and is associated with alopecia and hair cortisol levels.