Socially driven negative feedback regulates activity and energy use in ant colonies

Area of Science:

• Collective behavior
• Social energetics
• Animal behavior

Background:

• Energy regulation in social groups, such as ant colonies, remains poorly understood despite extensive research.
• Key questions involve decentralized control of collective activity and workload distribution among individuals.
• Understanding how social groups conserve energy by avoiding constant activity is crucial.

Purpose of the Study:

• To investigate the mechanisms of energy regulation in social insect colonies.
• To explore the role of social interactions in modulating collective activity and energy expenditure.
• To explain how social groups achieve energetic efficiency.

Main Methods:

• Development of an intuitive compartmental model.
• Calibration and validation of the model using data from ant colonies.
• Analysis of system stability to understand feedback mechanisms.

Main Results:

• A novel balance between positive and negative social feedback was identified, driven by individual activity levels.
• Low activity stimulates work, while high activity leads to self-inhibition, capping the active proportion.
• Group-level energy expenditure scales sub-linearly with group size, similar to Kleiber's law.

Conclusions:

• Social interactions are critical for the collective energetic efficiency of group-living organisms.
• The identified feedback balance provides a mechanism for decentralized energy regulation in social groups.
• Findings offer new insights into the energetic scaling of social systems.