Discovery spins new interest in fruit fly behavior
Fruit flies, known for their affinity for fruit, have unveiled another interest – riding on a carousel. Research by scientists specialising in neurobiology and genetics reveals a new dimension of these insects.
Fruit flies, or Drosophila melanogaster, are typically known for being drawn to fruit. However, the latest research suggests that these insects could just as easily be dubbed carousel flies. The study published in "Current Biology" by Dr Wolf Hütteroth, Dr Tilman Triphan, and Dr Clara Ferreira, shows that one in four fruit flies gladly spends time on a carousel.
As "Bild" reports, the scientists conducted an experiment reminiscent of a flea circus. Two groups of 95 flies were placed in two arenas, each 10 centimetres in diameter. Each had access to food, space to fly, and a mini-carousel with a diameter of 5 centimetres. The distinction was that one carousel would spin, while the other remained stationary.
The findings from the observations were unexpected. Dr. Wolf Hütteroth highlighted that a significant portion of the insects, around one-fourth, chose to spend more time on the rotating carousel than those in the control group on the stationary platform. The flies were also willing to sacrifice some of their eating time to engage with the carousel.
Why do flies choose carousels?
The reason behind fruit flies displaying this behavior is still uncertain. One possibility is that it provides evolutionary advantages associated with play. Dr. Hütteroth points out that passive, voluntary movements—such as those experienced on a carousel, swing, or slide—are standard on playgrounds and generally perceived as enjoyable. Insects may use these motions to refine their body awareness.
This discovery casts new light on the behaviour of fruit flies, showing that their lives are not confined solely to seeking food and reproduction. This may also provide a clue for further research on animal behaviours and their evolutionary advantages.
