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Sean Nash

Foraging ants navigate more efficiently when given energy-drink-like doses of caffeine ... - 0 views

www.sciencedaily.com/...240523112447.htm

ants learning memory caffeine navigation poison bait uptake efficiency invasive insects zoology HSR HSR-2025 science behavioralscience biology potential research idea

shared by Sean Nash on 01 Jun 24 - No Cached
  • Ants who receive a caffeine-laced sugary reward become more efficient at navigating back to the reward's location compared to ants that only receive sugar. Researchers report on May 23 in the journal iScience that caffeinated ants move toward the reward via a more direct path but do not increase their speed, suggesting that caffeine improved their ability to learn.
  • "The idea with this project was to find some cognitive way of getting the ants to consume more of the poisonous baits we put in the field,"
  • it pushes them into having straighter paths and being able to reach the reward faster
  • ...7 more annotations...
  • Control efforts, which focus on using poisonous baits, have proven ineffective, likely due to low bait uptake and bait abandonment. The researchers wanted to test whether using caffeine, which has been shown to improve learning in honeybees and bumblebees, might improve the ants' ability to learn the bait location and guide their nestmates back there
  • The ants walked down a Lego drawbridge onto a testing platform -- an A4 sheet of paper overlaying an acrylic surface -- on which the researchers had placed a drop of sucrose solution laced with 0, 25 ppm, 250 ppm, or 2,000 ppm of caffeine
  • The lowest dose we used is what you find in natural plants, the intermediate dose is similar to what you would find in some energy drinks, and the highest amount is set to be the LD50 of bees -- where half the bees fed this dose die -- so it's likely to be quite toxic for them," says Galante.
  • Overall, they tested 142 ants, and each ant was tested four times
  • Foraging time dropped by 28% per visit for ants that received 25 ppm of caffeine and by 38% per visit for ants that received 250 ppm of caffeine, meaning that if an ant took 300 s in its first visit, by the final trial, it would be expected to take 113 s at the low caffeine dose and 54 s at the intermediate dose. This effect was not seen at the highest caffeine dose.
  • The researchers showed that caffeine lowered the ants' foraging times by making them more efficient, not by making them speedier. There was no effect of caffeine on the ants' pace at any dosage, but ants that received low to intermediate doses of caffeine trips traveled by less tortuous paths. "What we see is that they're not moving faster, they're just being more focused on where they're going," says Galante. "This suggests that they know where they want to go, therefore, they have learned the locations of the reward."
  • Henrique Galante, Massimo De Agrò, Alexandra Koch, Stefanie Kau, Tomer J. Czaczkes. Acute exposure to caffeine improves foraging in an invasive ant. iScience, 2024; 109935 DOI: 10.1016/j.isci.2024.109935
Kylie John

Ants perform life saving operations - the only animal other than humans known to do so ... - 0 views

www.livescience.com/...her-than-humans-known-to-do-so

HSR-2025 HSR behavioralscience insects potential research idea

shared by Kylie John about 11 hours ago - No Cached
  • In experiments, they observed that the ants treated their nest members' femur injuries by cleaning the wound with their mouths before amputating the leg by repeatedly biting it, while the tibia wounds were treated with just cleaning.
    • Kylie John
      Kylie John about 11 hours ago
       
      I wonder how the ant functions after this. It mentions that later the survival rate goes up but is the ant still able to do everything it used to? Like how ants can carry a lot more than their body weight, does that change for the ant after it got amputated?
  • The scientists are now extending their research to other ant species that don't possess special antimicrobial glands to see if other ants have the ability to perform surgeries. 
    • Kylie John
      Kylie John about 11 hours ago
       
      Research oppurtunity?
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