Intermale aggression in mice, selected for the cognitive trait.

Area of Science:

• Behavioral Neuroscience
• Animal Cognition
• Ethology

Background:

• Intermale aggression is a complex behavior influenced by various factors.
• Cognitive traits and emotional states like anxiety can modulate aggressive behaviors.
• Selection studies in animal models provide insights into the genetic and neurobiological underpinnings of behavior.

Purpose of the Study:

• To investigate the relationship between a specific cognitive trait (extrapolation of movement direction) and intermale aggression in mice.
• To examine how selection for enhanced cognitive ability affects aggression levels over generations.
• To explore the potential role of anxiety in mediating changes in aggression during cognitive selection.

Main Methods:

• Mice were selectively bred for high scores in the ability for extrapolation of movement direction.
• Intermale aggression was assessed in selected mice and compared to control groups.
• Anxiety levels were monitored across selection generations in both selected and control mice.

Main Results:

• Mice selected for high cognitive trait scores exhibited significant changes in intermale aggression levels.
• A correlation was observed between the changes in aggression and alterations in anxiety levels during the selection process.
• Control groups did not show comparable changes in aggression or anxiety, highlighting the effect of selection.

Conclusions:

• Selection for enhanced cognitive extrapolation ability in mice influences intermale aggression.
• Anxiety levels appear to be a potential mediating factor in the observed behavioral changes.
• These findings suggest a link between cognitive function, anxiety, and aggression in this mouse model.