Does resource-mediated stress affect colony personality in leaf-cutting ants?

Area of Science:

• Ecology
• Animal Behavior
• Entomology

Background:

• Animal personality describes consistent behavioral patterns.
• Limited understanding exists on colony personality and foraging in social insects.
• Leaf-cutting ants (Acromyrmex subterraneus) were studied for personality traits and foraging behavior.

Purpose of the Study:

• Assess personality traits in Acromyrmex subterraneus colonies.
• Examine behavioral consistency under toxic substrate stress (nasturtium leaves).
• Investigate the link between colony personality, foraging, and fungus garden growth for pest management.

Main Methods:

• Behavioral assays were conducted on Acromyrmex subterraneus colonies.
• Colonies were exposed to nasturtium leaves to assess stress response.
• Fungus garden growth was measured to evaluate colony health and foraging efficacy.

Main Results:

• Behavioral variation was greater between colonies than subspecies.
• Behavioral traits remained correlated before and after stress, indicating behavioral syndromes.
• Colony activity, aggressiveness, and boldness were key personality dimensions linked to foraging.

Conclusions:

• Colony personality, influenced by caste interactions, impacts foraging behavior.
• Nasturtium leaves act as a toxic substrate, impairing interactions and potentially suppressing colonies.
• Resource-mediated stress affects colony personality, suggesting control potential against these ant species.