idw – Informationsdienst Wissenschaft

Nachrichten, Termine, Experten

Grafik: idw-Logo
Science Video Project
idw-Abo

idw-News App:

AppStore

Google Play Store



Instance:
Share on: 
08/22/2023 15:29

Ants can predict queues an avoid them

Bastian Schmidt Präsidialabteilung, Bereich Kommunikation & Marketing
Universität Regensburg

    Ants understand if a place is easily crowded just by looking at it, and use this knowledge to avoid overcrowded food sources in advance, without actually seeing the overcrowding

    As humans, we are pretty good at working out how busy the cafeteria at work will be, and going elsewhere if we think it will be full. Now, researchers at the University of Regensburg have discovered that ants also understand that some feeding places can get full, and avoid them if they think lots of ants are going there already.
    Queuing is annoying and wastes our time, so we try to avoid it. Imagine if your favorite lunch place was a tiny take-out restaurant, and you saw lots of people coming your way with food from there. If you’re really hungry, you might think ‘oh, it’s probably quite busy, maybe I’ll go somewhere else today’. Ants can have exactly the same problem: they get a lot of their food from insects like aphids which make honeydew. But, small groups of aphids only make a bit of honeydew, and it takes a long time to make more once it’s been eaten.
    “Ants are more similar to us than most people think” said Dr Laure-Anne Poissonnier, who led the study. “So, I wondered – would ants also try to avoid food sources they like, if the food sources have limited space and look busy?” To test this, the researchers let ants eat from a special ant feeder, either with holes for lots of ants to feed from, or only enough space for one ant. They then let the ants know that there is another feeder, also easily crowded or not, somewhere else. When the hungry ants came again looking for something to eat, half of them met lots of full ants coming back from the first, favorite feeder, and half met no other ants. If the hungry ants had used feeders with lots of holes last time, or didn’t meet any other ants this time, they just went to their favorite feeder. But, if the hungry ants had used easily-crowded feeders, and met lots of other ants coming back from the favorite feeder, they avoided it, and went instead to the less-favored alternative.
    “The really crazy thing” says Dr Tomer Czaczkes, who also worked on the study “is not even that they avoided the crowded food at rush-hour. That makes sense. The real question is: how did they work out that the feeder could get crowded?”. The ants never saw that feeder before in their lives, and never experienced crowding. Yet, somehow, they worked out that this feeder can only fit a few ants. “This suggests,” adds Laure-Anne “that the ants have a very deep understanding of how the world works”.


    Contact for scientific information:

    Dr. Tomer J. Czaczkes
    Chair of Zoology / Evolutionary Biology
    University of Regensburg
    Tel.: +49 (0)941/943-2996
    Mobil: +49 176 344 27597
    E-Mail: tomer.czaczkes@ur.de
    tomer.czaczkes@gmail.com

    Dr. Laure-Anne Poissonnier
    Chair of Zoology / Evolutionary Biology
    University of Regensburg
    Tel.: +49 (0)941/943-3356
    Mobil: +33 627 43 57 67
    E-Mail: laure-anne.poissonnier@ur.de
    l.a.poissonnier@gmail.com


    Original publication:

    Laure-Anne Poissonnier, Yannick Hartmann, Tomer J. Czaczkes (2023), “Ants combine object affordance with latent learning to make efficient foraging decisions.", Proceedings of the National Academy of Sciences (PNAS), DOI: 10.1073/pnas.2302654120
    https://doi.org/10.1073/pnas.2302654120


    Images

    Criteria of this press release:
    Journalists, Scientists and scholars, all interested persons
    Biology, Zoology / agricultural and forest sciences
    transregional, national
    Research results, Scientific Publications
    English


     

    Help

    Search / advanced search of the idw archives
    Combination of search terms

    You can combine search terms with and, or and/or not, e.g. Philo not logy.

    Brackets

    You can use brackets to separate combinations from each other, e.g. (Philo not logy) or (Psycho and logy).

    Phrases

    Coherent groups of words will be located as complete phrases if you put them into quotation marks, e.g. “Federal Republic of Germany”.

    Selection criteria

    You can also use the advanced search without entering search terms. It will then follow the criteria you have selected (e.g. country or subject area).

    If you have not selected any criteria in a given category, the entire category will be searched (e.g. all subject areas or all countries).