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A Million Cannibal Ants Trapped In Nuclear Bunker Have Escaped

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5 November 2019
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A Million Cannibal Ants Trapped In Nuclear Bunker Have Escaped
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A “colony” of up to one million cannibal ants trapped in a nuclear bunker for years have escaped, scientists in Poland have said.

The ants, which had no food source other than dead ants, were first discovered in 2013.w hey ere found to be solely made up of worker ants meaning they could not reproduce—how their numbers grew so large was a mystery.

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Habermas ordnet die Philosophiegeschichte: Das neue Werk des 90-jährigen Gelehrten ist nicht nur eine Bilanz, es ist auch ein Appell

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In a study published in the Journal of Hymenoptera Research, researchers have now studied the colony to understand how it functioned—and installed an escape route to see if its members would leave their home given the option.

The team, led by Wojciech Czechowski, from the Museum and Institute of Zoology and the Polish Academy of Sciences, were carrying out a survey of bats living in an abandoned Soviet nuclear bunker when they came across the wood ants living in an ammunition bunker where nuclear weapons were once kept. The ants had no access to the outside world and appeared to have come from a nest above that was positioned over a ventilation pipe. When the ants fell down the pipe, they were entombed in the bunker.

However, after returning to the site two years later, scientists found the colony was not only still there, but that it had grown in numbers. This was despite there being no obvious food source, no heat and no light. A population estimate suggested there were hundreds of thousands, if not one million ants living in the bunker, according to Newsweek.

The team wrote:

The masses of Formica polyctena workers trapped in the bunker had no choice. They were merely surviving and continuing their social tasks on the conditions set by the extreme environment.

In 2016, scientists found the colony was still there and the team set out to analyze its behavior. They installed a boardwalk that led to another ventilation pipe that the ants could use to escape the bunker. A year later, they returned to the site to find the colony had almost completely vanished. The team inspected the corpses that had been left behind and found bite marks and holes. This, they said, was evidence that the ants were eating their deceased nestmates in order to survive.

After being provided an escape route, the ants appear to have made their way back to the original nest.

The survival and growth of the bunker ‘colony’ through the years, without producing own offspring, was possible owing to continuous supply of new workers from the upper nest and accumulation of nestmate corpses. The corpses served as an inexhaustible source of food which substantially allowed survival of the ants trapped down in otherwise extremely unfavourable conditions.

Researchers say the case of the cannibal colony shows the extremes wood ants will go to in order to maintain self organization “even under conditions going far beyond the limits of the survival of the species.”

More generally, the present case adds a dimension to the great adaptive ability of ants to marginal habitats and suboptimal conditions, as the key to understanding their unquestionable eco-evolutionary success.

Source: Newsweek

Tags: antscannibalnuclear
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