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Concept

Hiérarchie de dominance

Publications associées (22)

Cortical ensembles orchestrate social competition through hypothalamic outputs

Hao Li, Sébastien Benjamin Hausmann

Most social species self-organize into dominance hierarchies(1,2), which decreases aggression and conserves energy(3,4), but it is not clear how individuals know their social rank. We have only begun to learn how the brain represents social rank(5-9) and g ...

2022

The glucocorticoid receptor in the nucleus accumbens plays a crucial role in social rank attainment in rodents

Maria del Carmen Sandi Perez, Olivia Zanoletti, Fiona Hollis, Jocelin Grosse, Ioannis Zalachoras, Meltem Weger, Aurélie Lattion, Thomas Didier Larrieu, Alexandre Claude Gustave Bacq

Social hierarchy in social species is usually established through competitive encounters with conspecifics. It determines the access to limited resources and, thus, leads to reduced fights among individuals within a group. Despite the known importance of s ...

2020

Astrocytic release of ATP through type 2 inositol 1,4,5‐trisphosphate receptor calcium signaling and social dominance behavior in mice

Maria del Carmen Sandi Perez, Fiona Hollis, Jocelin Grosse, Marie-Isabelle Guillot de Suduiraut, Eva Ramos Fernandez

Brain mitochondrial function is critical for numerous neuronal processes. We recently identified a link between brain energy and social dominance, where higher levels of mitochondrial function resulted in increased social competitive ability. The underlyin ...

2020

Metabolic signature in nucleus accumbens for anti-depressant-like effects of acetyl-L-carnitine

Rolf Gruetter, Maria del Carmen Sandi Perez, Jocelin Grosse, Antoine Timothée Cherix, João Pedro de Matos Rodrigues, Thomas Didier Larrieu

Emerging evidence suggests that hierarchical status provide vulnerability to develop stress-induced depression. Energy metabolic changes in the nucleus accumbens (NAc) were recently related to hierarchical status and vulnerability to develop depression-lik ...

2020

Latency to Reward Predicts Social Dominance in Rats: A Causal Role for the Dopaminergic Mesolimbic System

Maria del Carmen Sandi Perez, Simone Astori, Ioannis Zalachoras, Laura Lozano Montes

Reward signals encoded in the mesolimbic dopaminergic system guide approach/seeking behaviors to all varieties of life-supporting stimuli (rewards). Differences in dopamine (DA) levels have been found between dominant and submissive animals. However, it is ...

2019

Neuropharmacology of the mesolimbic system and associated circuits on social hierarchies

Maria del Carmen Sandi Perez, Sriparna Ghosal

Most socially living species are organized hierarchically, primarily based on individual differences in social dominance. Dominant individuals typically gain privileged access to important resources, such as food, mating partners and territories, whereas s ...

2019

Increased brain glucocorticoid actions following social defeat in rats facilitates the long-term establishment of social subordination

Maria del Carmen Sandi Perez, Jocelin Grosse, Olivia Zanoletti, Meltem Weger

Social rank is frequently established through aggressive encounters between new conspecifics. Despite increasing evidence suggesting that social rank is critical for the well-being of both humans and animals, knowledge about the factors influencing social ...

2018

Hierarchical status predicts behavioral vulnerability and nucleus accumbens metabolic profile following chronic social defeat stress

Rolf Gruetter, Maria del Carmen Sandi Perez, Hongxia Lei, João Pedro de Matos Rodrigues, Antoine Timothée Cherix, Thomas Didier Larrieu

Extensive data highlight the existence of major differences in individuals’ susceptibility to stress [1; 2; 3 ; 4]. While genetic factors [5 ; 6] and exposure to early life stress [7 ; 8] are key components for such neurobehavioral diversity, intriguing ob ...

2017

Stoichiometric N:P flexibility and mycorrhizal symbiosis favour plant resistance against drought

Pierre Rémi Mariotte

Drought induces changes in the nitrogen (N) and phosphorus (P) cycle but most plant species have limited flexibility to take up nutrients under such variable or unbalanced N and P availability. Both the degree of flexibility in plant N:P ratio and of ro ...

Wiley2017

Stress, glucocorticoid receptor and social behaviors

Aurélie Lattion

Peripuberty, comprising childhood and adolescence, constitutes an important time window in the brain development and maturation. Exposure to prolonged stress during this period has been shown to increase the risk for the development of psychopathologies la ...

EPFL2017

Oral transfer of chemical cues, growth proteins and hormones in social insects

Laurent Keller, Laure Menin, Daniel Ortiz Trujillo, Oksana Riba Grognuz

Social insects frequently engage in oral fluid exchange trophallaxis between adults, and between adults and larvae. Although trophallaxis is widely considered a food-sharing mechanism, we hypothesized that endogenous components of this fluid might underlie ...

Elife Sciences Publications Ltd2016

Subordinate plants mitigate drought effects on soil ecosystem processes by stimulating fungi

Alexandre Buttler, Vincent Eric Jules Jassey, Pierre Rémi Mariotte, Bjorn Jozef Maria Robroek

The subordinate insurance hypothesis suggests that highly diverse communities contain greater numbers of subordinate species than less diverse communities. It has previously been reported that subordinate species can improve grassland productivity durin ...

Wiley-Blackwell2015

The impact of anxiety and reward-seeking traits on social competition and the role of the mesolimbic dopaminergic system

Laura Lozano Montes

Social hierarchies are established across a range of different taxa in the animal kingdom. Given that hierarchy inequalities are highly present in nowadays society and the health problems that low rank individuals suffer from this, it is surprising that no ...

EPFL2015

The genetics of social hierarchies

Maria del Carmen Sandi Perez

The organization of individuals in social hierarchies is ubiquitous in social species. Although the evolution of dominance at the population level is constrained by its interactive character, selective breeding shows that dominance and subordination can be ...

2015

How do subordinate and dominant species in semi-natural mountain grasslands relate to productivity and land-use change?

Alexandre Buttler, Pierre Rémi Mariotte, Thomas Spiegelberger

Changes in agricultural practices of semi-natural mountain grasslands are expected to modify plant community structure and shift dominance patterns. Using vegetation surveys of 11 sites in semi-natural grasslands of the Swiss Jura and Swiss and French Alps ...

Elsevier Gmbh, Urban & Fischer Verlag2013

Effects of Subordinate Plant Species in Plant and Soil Community Structure and Ecosystem Functioning

Pierre Rémi Mariotte

The relevance of biodiversity to human health is an increasing international political issue as it causes concern for ethical and aesthetic reasons, but also has a strong impact on ecosystem properties and ecological goods and services utilised by humanity ...

EPFL2012

Evidence for biological roots in the transgenerational transmission of intimate partner violence

Maria del Carmen Sandi Perez, Maria Isabel Cordero Campana, Guillaume Poirier, Vandana Veenit, Basira Salehi

Intimate partner violence is a ubiquitous and devastating phenomenon for which effective interventions and a clear etiological understanding are still lacking. A major risk factor for violence perpetration is childhood exposure to violence, prompting the p ...

2012

Neurobiological Mechanisms Involved in the Establishment and Maintenance of Dominance Hierarchies and its Modulation by Stress in Rats

Maria del Carmen Sandi Perez, Marjan Timmer

Stress can have a strong and long lasting effect on the establishment and maintenance of dominance hierarchies in rats. When two rats of a pair have not been stressed (non-stressed pair) before a first social encounter, they establish a dominance hierarchy ...

EPFL2011

Evidence for a role of oxytocin receptors in the long-term establishment of dominance hierarchies

Maria del Carmen Sandi Perez, Maria Isabel Cordero Campana, Marjan Timmer

Exposure to stress can affect the establishment of dominance hierarchies. In our model, a social hierarchy established by two male rats during a first encounter is not maintained 1 week later. If one of the two rats is stressed, the stressed rat becomes su ...

2011

Stochastic modelling of prey depletion processes

Anthony Christopher Davison

The modelling of prey-predator interactions is of major importance for the understanding of population dynamics. Classically, these interactions are modelled using ordinary differential equations, but this has the drawbacks of assuming continuous populatio ...

2009