Article
Biology
Kelly J. Wallace, Kavyaa D. Choudhary, Layla A. Kutty, Don H. Le, Matthew T. Lee, Karleen Wu, Hans A. Hofmann
Summary: This study assessed male Astatotilapia burtoni fish in cognitive tasks before and after a community perturbation. The researchers found that ascending males underwent physiological changes and showed preference for novel object recognition during the perturbation, and differed in social competence from non-ascenders. Principal component analysis also identified specific cognitive and physiological attributes that predispose certain individuals to ascend in social status.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Psychology, Biological
Todd Armstrong, Jessica Wells, Danielle L. Boisvert, Richard H. Lewis, Eric M. Cooke, Matthias Woeckener, Nicholas Kavish
Summary: The interaction between testosterone and cortisol is associated with variation in aggressive behavior, but results are mixed. In a large sample of university students, the association between hormones and aggression varies across sex and different types of aggressive behavior. Baseline cortisol and testosterone have different effects on reactive and proactive aggression, with cortisol showing negative and positive associations with aggression in women, respectively. Testosterone is not directly related to aggression in either men or women.
BIOLOGICAL PSYCHOLOGY
(2021)
Review
Biology
T. M. Milewski, W. Lee, F. A. Champagne, J. P. Curley
Summary: Individuals in dominant and subordinate positions in social hierarchies exhibit different behaviors, physiology, and neural functioning. Dominant animals display higher levels of dominance behaviors and reproductive behaviors, while subordinate animals inhibit these behaviors and adapt to socially stressful contexts. These changes may have short-term benefits but pose long-term challenges to health. Additionally, rapid changes in social ranks are associated with dynamic modulations in the brain and periphery.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Behavioral Sciences
Aaryn Mustoe
Summary: Callitrichid primates are characterized by their high levels of sociality, behavioral flexibility, and single-female dominant hierarchies. Dominant, breeding individuals engage in reproductive suppression of subordinates through increased offspring production, higher ovulatory hormone levels, and greater sociosexual opportunities. The extent of reproductive suppression varies based on social stability and group composition. Dominant males also induce reproductive suppression in subordinate males, but to a lesser extent than females. Callitrichids exhibit an absence of intersexual dominance, likely to maintain breeding pairs and social cooperation. Further research is needed to understand the neuroendocrine mechanisms underlying sex differences in callitrichid behavior and its implications for overall health and wellbeing.
HORMONES AND BEHAVIOR
(2023)
Article
Behavioral Sciences
Ana Lilia Cerda-Molina, Lilian Mayagoitia-Novales, Claudio de la O-Rodriguez, Javier Borraz-Leon, Gilberto Matamoros-Trejo
Summary: The role of androgens, age, and rank position in the regulation of intrasexual competition and aggression in primate females was studied. The study found that levels of estradiol were positively associated with female-to-female aggression, while testosterone levels were negatively associated with female-to-male aggression and positively associated with dominance rank. Age was not found to affect aggressive behaviors. Male-to-female aggression was predicted by sexual behaviors, but not by female hormonal levels.
BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY
(2022)
Article
Biology
Aubrey M. Kelly, Jose AntonioGonzalez Abreu, Richmond R. Thompson
Summary: The study found that testosterone can facilitate or inhibit prosocial behaviors depending on social context, and have rapid and prolonged effects on prosocial responses. This hormone also affects oxytocin signaling mechanisms which mediate its context-dependent behavioral influences.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Biology
Patricia Beltrao, Ana Cristina R. Gomes, Goncalo C. Cardoso
Summary: Bullying is a phenomenon where individuals attack those lowest in the social dominance hierarchy, and its purpose is not yet fully understood because the victims do not pose a challenge to the aggressors. However, it appears that bullying may serve as a means of displaying dominance to others. This can help manage dominance hierarchies and avoid direct confrontations with potentially dangerous opponents.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Biology
Tobit Dehnen, Danai Papageorgiou, Brendah Nyaguthii, Wismer Cherono, Julia Penndorf, Neeltje J. Boogert, Damien R. Farine
Summary: Male vulturine guineafowl strategically exhibit higher-cost aggressive interactions toward individuals with lower ranks, while lower-cost aggressive interactions are directed toward individuals further down the hierarchy. These results support the hypothesis that the costs associated with different interaction types can determine their expression in social groups with steep dominance hierarchies.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Behavioral Sciences
Katrina J. White, Melissa G. Rivas, Devaleena S. Pradhan
Summary: The neuroendocrine system regulates aggressive interactions during status establishment in vertebrates living in social hierarchies. Sex steroids (E2 and KT) and cortisol are associated with aggression in different phases of teleost fishes' life history. Brain E2, CORT, and KT play important roles in the regulation of hierarchy re-establishment and maintenance during protandrous and protogynous sex change in bluebanded gobies.
HORMONES AND BEHAVIOR
(2023)
Article
Multidisciplinary Sciences
Hikari Koyasu, Hironobu Takahashi, Moeka Yoneda, Syunpei Naba, Natsumi Sakawa, Ikuto Sasao, Miho Nagasawa, Takefumi Kikusui, Hikari Koyasuid
Summary: This study investigated the relationships between sociality, hormone concentrations, and gut microbiome in domestic cats. It was found that individuals with high cortisol and testosterone concentrations had less contact with others, while those with high oxytocin concentrations exhibited less affiliative behaviors than expected. The frequency of contact among individuals was related to the similarity in gut microbiome, which was also associated with behavioral patterns and cortisol secretion. Interestingly, individuals with low cortisol and testosterone concentrations were more tolerant, making high-density living easier.
Article
Multidisciplinary Sciences
Nora Nickels N. McLean, Dario N. Maestripieri
Summary: This study aims to investigate the impact of psychosocial stress on hormonal responses during social interactions, specifically in terms of courtship opportunities. Heterosexual men and women were divided into control and stress groups, and engaged in social interactions with members of the opposite sex. The expected increase of testosterone levels in the control group was not observed, and there were no significant changes in testosterone levels in the stress group. However, analyses showed that relationship status played a significant role in cortisol and testosterone levels, with single individuals exhibiting higher cortisol levels and individuals in relationships experiencing a decrease in testosterone following the social interaction. These findings suggest that relationship status and psychosocial stress are important factors influencing the physiological responses to potential courtship opportunities.
Article
Multidisciplinary Sciences
Hongpeng Lv, Tianfang Wang, Jing Zhang, Zhaolan Liu, Jian Dong, Haotian Xie, Yingying Yang, Peiwen Xue, Yuwen Che, Pengpeng Han
Summary: Facial appearance provides insights into personality traits, particularly in relation to facial width-to-height ratio (fWHR) and mandibular morphology. This study found that males had larger bilateral mandibular line angles, while females had a greater fWHR. Canonical correlation analysis demonstrated that facial features were correlated with personality traits, with the loadings of bilateral mandibular line angles being more significant than fWHR. Moreover, the correlations between these facial features and certain personality factors varied between males and females.
Article
Behavioral Sciences
Nobuyuki Kutsukake, Migaku Teramoto, Seijiro Honma, Yusuke Mori, Takafumi Ishida, Toshikazu Hasegawa
Summary: The re-introduction of a temporally separated individual to a group has significant effects on social integration and hormone levels in captive animals. This study found that social reunion leads to increased agonism and tension reduction, suggesting the reformation of social relationships. Additionally, the acclimation stage appears to have a greater impact on hormone levels than the characteristics of the reunion itself.
Review
Biochemistry & Molecular Biology
Tiffany C. Ho, Anthony J. Gifuni, Ian H. Gotlib
Summary: Pubertal hormonal events play a significant role in the development of brain systems related to social stress regulation, which is critical to consider in understanding adolescent suicide risk. Investigating factors such as pubertal timing may help deepen the understanding of sex differences in the mechanisms underlying suicidal thoughts and behaviors in adolescents.
MOLECULAR PSYCHIATRY
(2022)
Article
Endocrinology & Metabolism
Lindsay Bochon, Brian M. Bird, Neil Watson
Summary: Exclusion from social relationships can negatively affect an individual's status and dominance. The hormone testosterone plays a role in the behavioral responses to exclusion, such as aggression or prosocial behavior, as individuals try to maintain or enhance their social status. The link between testosterone changes and behavior, however, depends on individual dispositions and the context of social exclusion.
PSYCHONEUROENDOCRINOLOGY
(2023)
Article
Behavioral Sciences
Farrah N. Madison, Verner P. Bingman, Tom Smulders, Christine R. Lattin
Summary: Although research on the avian hippocampus has been limited, it is crucial for understanding its evolution and changes over time. The avian hippocampus plays important roles in spatial cognition as well as regulating anxiety, approach-avoidance behavior, and stress responses. Future research should focus on elucidating the cellular and molecular mechanisms, including endocrinology, to resolve outstanding questions about avian hippocampal function and organization.
HORMONES AND BEHAVIOR
(2024)
Article
Behavioral Sciences
Judith A. H. Smit, Riet Vooijs, Peter Lindenburg, Alexander T. Baugh, Wouter Halfwerk
Summary: This study investigates the effects of urbanization on hormone levels in tungara frogs and found that urban frogs and forest frogs have different endocrine phenotypes. Exposure to urban noise and light pollution led to an increase in testosterone and a decrease in corticosterone in urban frogs, while forest frogs showed no endocrine response to sensory pollutants. These results suggest that urbanization can modulate hormone levels and influence behavior in frogs.
HORMONES AND BEHAVIOR
(2024)
Article
Behavioral Sciences
Hannah D. Fulenwider, Yangmiao Zhang, Andrey E. Ryabinin
Summary: Social hierarchies have significant effects on overall health of individuals in animal groups, particularly the lowest-ranking individuals. Tube test can be used to determine social rank in male and female mice, and the complex interactions between social rank, sex, environment, and testing length influence peptide levels.
HORMONES AND BEHAVIOR
(2024)