Pleometrosis

Content sourced from Wikipedia, licensed under CC BY-SA 3.0.

Pleometrosis: A short, simple guide

What it is
Pleometrosis is a behavior in social insects where more than one queen starts a new colony at the same time. It is best known in ants but also occurs in some wasps, bees, and termites.

Why it happens
In areas with many colonies and limited resources, starting a colony with several queens can give a big early boost. More queens mean more initial workers, which helps the new colony grow fast and compete with rivals.

How it works
- Several queens team up to found one colony.
- They produce workers quickly, helping the colony reach a mature, reproductive stage faster.
- Over time, most pleometrotic colonies end up with a single dominant queen. The other queens are often killed or pushed out.
- In some species, multiple queens stay in the colony longer, at least during the early growth stages.

Costs and benefits
- Benefits: Faster growth, more workers early on, better early defense, and a stronger push to take resources from surrounding colonies.
- Costs: Competition among queens can be fierce, leading to the death or displacement of some queens and ongoing internal competition.

Examples and variation
- Azteca ants that live in Cecropia trees often use pleometrosis to quickly build a large workforce and control a tree’s resources.
- Different species show different patterns: some quickly become one-queen colonies, while others keep several queens for longer.

Key takeaways
- Pleometrosis is not mainly about helping relatives; it’s about beating competing colonies early on.
- It’s a strategy that improves short-term survival and growth in crowded, resource-limited environments, even though it often ends with a single queen ruling the colony.