Related Experiment Video
Updated: Feb 17, 2026
09:12
The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
Published on: July 4, 2013
72.8K
COMT Val158 Met moderates the link between rank and aggression in a non-human primate
D R Gutleb1,2,3, C Roos4,5, A Noll5
1Department of Behavioral Ecology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, University of Goettingen, Göttingen, Germany.
Genes, Brain, and Behavior
|December 2, 2017
Summary
The Catechol-O-methyltransferase (COMT) Val158Met polymorphism, previously thought human-specific, was found in Assamese macaques. This genetic variation influences aggression, interacting with social rank in wild primates.
Area of Science:
- Behavioral genetics
- Primate behavior
- Evolutionary biology
Background:
- The Catechol-O-methyltransferase (COMT) Val158Met polymorphism is extensively studied for its role in human aggression and stress response.
- Previous research has largely focused on human populations, with limited understanding of this polymorphism's presence and function in other species.
- Investigating non-human primates can provide insights into the evolutionary origins and broader biological significance of such genetic variations.
Purpose of the Study:
- To screen a wild primate population for the COMT Val158Met polymorphism.
- To determine if this polymorphism is associated with variations in aggressive behavior in Assamese macaques.
- To explore the interaction between COMT genotype, dominance rank, and aggression rates in a naturalistic setting.
Main Methods:
- Behavioral data was collected through focal animal observations of Assamese macaques (Macaca assamensis) in Thailand.
- Fecal samples were used for non-invasive DNA analysis to identify COMT Val158Met genotypes.
- Statistical analyses, including time series analysis, were employed to examine the relationship between genotype, rank, and aggression.
Main Results:
- The human COMT Val158Met polymorphism was identified in the studied macaque population.
- A significant interaction effect was observed between COMT genotype and dominance rank on aggression rates.
- Aggression patterns varied based on genotype: Val/Val individuals showed increased aggression with higher rank, while Met/Met and Val/Met individuals showed decreased aggression.
Conclusions:
- The COMT Val158Met polymorphism is not unique to humans and influences behavior in other primate species.
- The interaction between genotype and social status is crucial for understanding aggression variation in wild primates.
- This study provides evidence for the evolutionary roots of inter-individual variation in aggression, informing human behavioral genetics.
Related Concept Videos
01:47Aggression
30.5K
Humans engage in aggression when they seek to cause harm or pain to another person. Aggression takes two forms depending on one’s motives: hostile or instrumental. Hostile aggression is motivated by feelings of anger with intent to cause pain; a fight in a bar with a stranger is an example of hostile aggression. In contrast, instrumental aggression is motivated by achieving a goal and does not necessarily involve intent to cause pain (Berkowitz, 1993); a contract killer who murders for...
30.5K
01:21Secondary Motives: Affiliation Motivation and Aggression Motivation
737
Affiliation motivation is the intrinsic desire to connect with others and belong to a social group, which plays a crucial role in forming and maintaining personal relationships. This type of motivation is essential for psychological well-being, as it provides individuals with a sense of community and support. An example of this is a student who joins a study group in order to feel a sense of connection. People with high affiliation motivation actively seek social approval, take satisfaction in...
737
02:12Relationship Formation
46.3K
What do you think is the single most influential factor in determining with whom you become friends and whom you form romantic relationships? You might be surprised to learn that the answer is simple: the people with whom you have the most contact. This most important factor is proximity. You are more likely to be friends with people you have regular contact with. For example, there are decades of research that shows that you are more likely to become friends with people who live in your dorm,...
46.3K
01:20Evolutionary Psychology
1.1K
Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the...
1.1K
01:28Causes of Social Behavior III: Biological and Environmental Influences
341
Social behavior is a complex phenomenon that arises from the interaction between biological predispositions and environmental influences. This intricate interplay shapes how individuals think, feel, and act in various social contexts. Understanding these mechanisms requires insights from psychology, neuroscience, genetics, and evolutionary theory.Environmental Influences on Social BehaviorEnvironmental factors, including temperature, odors, and visual stimuli, play a crucial role in shaping...
341
01:15Causes of Social Behavior II: Cognitive Processes
227
Cognitive processes affect social behavior by guiding how individuals perceive, interpret, and respond to social stimuli. These mental processes enable individuals to assess others' behaviors, attribute causes to their actions, and form expectations based on past experiences.Causes of Behavior and Social JudgmentsIndividuals determine the causes of others' behaviors by distinguishing between personal traits and external circumstances. For example, if a friend frequently arrives late, an...
227