About 40% of "worker" ants just hang around, doing nothing.
Ants are cultural signifiers of busy industriousness, but a new paper in Plos One reveals that, across species, about 40% of "worker" ants spend most of their days doing nothing.
The researchers hypothesize that the "lazy" ants form both a reservoir of genetic material and a reserve workforce that serves as a hedge against the death of the "productive" ants.
They may also serve as an emergency food supply for hard, cannibalistic times.
Charbonneau observed that the lazy ants tend to have more distended abdomens, hinting at the possibility that they could serve as "living pantries."
Published in another recent paper, this observation awaits further testing to determine whether their larger circumference is a cause or a consequence of the lazier workers' lifestyle.
Inactive workers act as a ‘reserve’ labor force replacing active workers, but inactive workers are not replaced when they are removed [Daniel Charbonneau, Takao Sasaki and Anna Dornhaus/Plos One]. »