Study Shows Ant Brain Signals Linking Hunger to Parental Care Evolved Across Species

In a Nature paper, scientists examined clonal raider ants and identified neuropeptide F and allatostatin A as opposing regulators of social role: the former encourages nursing of larvae, the latter stimulates foraging. Younger ants naturally exhibit higher F and lower A, a pattern that reverses with age, mirroring the colony's division of labor. Experimental boosting or suppressing each peptide switched individual ants between caregiving and food-searching behaviors.

Starvation raised F and lowered A, making ants act more like caregivers, while feeding produced the opposite effect. The researchers note that similar neuropeptides modulate parental care in mammals, hinting at a shared biological blueprint. Future work will map the exact neural circuits involved, potentially illuminating how complex social behaviors arise in diverse animals.