Ants operate a unique rescue system: When an insect is injured during a fight, it calls for help. Its mates will then carry it back to the nest for recovery.
The African Matabele ants (Megaponera analis) are widespread south of the Sahara and are a specialised termite predator. Two to four times a day, the ants set out to hunt prey. Proceeding in long files, they raid termites at their foraging sites, killing many workers and hauling the prey back to their nest.
These attacks, however, are met with resistance and the ants get involved in fights with termites of the soldier caste. Injury and mortality can occur during such combats, as the soldiers are very adept at using their powerful jaws to fend off the attackers.
So the invasions bear an increased risk of injury. For this reason, the ants have developed a rescue behaviour hitherto unknown in insects.
Chemical signal triggers rescue
When an ant is injured in a fight, it will "call" its mates for help by excreting chemical substances. The injured insect is then carried back to the nest where it can recover after receiving treatment. What is the "therapy" like? Usually, treatment involves removing the termites still clinging to the ant.
A german research team of the University of Würzburg's Biocentre has discovered this rescue behaviour of Megaponera analis and describes it in the journal "Science Advances". Erik Frank, Thomas Schmitt, Thomas Hovestadt, Oliver Mitesser, Jonas Stiegler, and Karl Eduard Linsenmair, all from the Chair of Animal Ecology and Tropical Biology, have participated in the research.
Rescuing the injured pays off
"We have observed helping behaviour vis-à-vis injured animals for the first time in invertebrates," says Ph.D. student Erik Frank. This was an unexpected finding, especially for social insects, where individuals are usually of little value. But obviously, it pays off for the colony as a whole to invest in the rescue service as the researchers demonstrate in their publication.
Saving the injured: Rescue behaviour in the termite hunting ant Megaponera analis, Erik T. Frank, Thomas Schmitt, Thomas Hovestadt, Oliver Mitesser, Jonas Stiegler, Karl Eduard Linsenmair, Science Advances, 12. April 2017
Erik Frank, Biocentre of the Julius-Maximilians-Universität Würzburg (JMU), firstname.lastname@example.org
Information for journalists: Erik Frank will be working at the Ecological Research Station of the University of Würzburg in the Comoé National Park in the Republic of Côte d’Ivoire until July 2017. You can reach him there under the telephone number 0033 970 735 206, via e-mail to email@example.com and via Skype using the name erik_frank
Robert Emmerich | Julius-Maximilians-Universität Würzburg
ADP-ribosylation on the right track
26.04.2018 | Max-Planck-Institut für Biologie des Alterns
Flavins keep a handy helper in their pocket
25.04.2018 | University of Freiburg
Magnetic resonance imaging, or MRI, is a widely used medical tool for taking pictures of the insides of our body. One way to make MRI scans easier to read is...
At the Hannover Messe 2018, the Bundesanstalt für Materialforschung und-prüfung (BAM) will show how, in the future, astronauts could produce their own tools or spare parts in zero gravity using 3D printing. This will reduce, weight and transport costs for space missions. Visitors can experience the innovative additive manufacturing process live at the fair.
Powder-based additive manufacturing in zero gravity is the name of the project in which a component is produced by applying metallic powder layers and then...
Physicists at the Laboratory for Attosecond Physics, which is jointly run by Ludwig-Maximilians-Universität and the Max Planck Institute of Quantum Optics, have developed a high-power laser system that generates ultrashort pulses of light covering a large share of the mid-infrared spectrum. The researchers envisage a wide range of applications for the technology – in the early diagnosis of cancer, for instance.
Molecules are the building blocks of life. Like all other organisms, we are made of them. They control our biorhythm, and they can also reflect our state of...
University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.
Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.
Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...
13.04.2018 | Event News
12.04.2018 | Event News
09.04.2018 | Event News
26.04.2018 | Medical Engineering
26.04.2018 | Power and Electrical Engineering
26.04.2018 | Information Technology