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October 1, 2012

Enslaved worker ants fight back through acts of sabotage

It would appear that ants that are kept as slaves by more powerful species aren't as helpless as they might appear. New research from Gutenberg University Mainz in Germany shows that enslaved ants conduct their own form of civil disobedience, by neglecting and killing the offspring of their oppressors. And by doing so, the ants may be preventing their comrades outside the nest from being enslaved themselves.

This discovery was made by ant researcher Susanne Foitzik who started to observe this behavior back in 2009. But what she has since discovered is that this is not an isolated trick limited to one species; over the course of her studies, Foitzik has observed at least three different ant populations in which these acts of rebellion occur. It would appear, therefore, that it may be a fairly common way for enslaved ants to fight back.

Ants such as Temnothorax longispinosus become enslaved when workers from the slave-making ant colony, Protomognathus americanus, attack their nests. The parasitic master ants kill the adults of the subjugated population, and steal their offspring. Once back at their nest, the master ants force the new generation to feed and clean their larvae, thus compelling them to raise the offspring of their oppressors (what's called "brood parasitism").

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